Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Field often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Field, and based on these observations, apply Extract Interface, too.
1 | <?php |
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8 | class Field extends AbstractModel |
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9 | { |
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10 | public $type = 'string'; |
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11 | public $readonly = false; |
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12 | public $system = false; |
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13 | public $hidden = false; |
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14 | public $editable = true; |
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15 | public $visible = true; |
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16 | public $display = null; |
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17 | public $caption = null; |
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18 | public $placeholder = null; |
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19 | public $hint = null; |
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20 | public $group = null; |
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21 | public $allowHTML = false; |
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22 | public $sortable = false; |
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23 | public $searchable = false; |
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24 | public $mandatory = false; |
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25 | public $has_default_value = false; |
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26 | public $defaultValue = null; |
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27 | public $emptyText = null; |
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28 | public $auto_track_element = true; |
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29 | public $listData = null; |
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30 | public $theModel = null; |
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31 | |||
32 | public $relation = null; |
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33 | public $actual_field = null; |
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34 | |||
35 | public $onField = null; |
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36 | |||
37 | /** |
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38 | * Joins |
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39 | * @see from() |
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40 | * @var array |
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41 | */ |
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42 | public $relations = array(); |
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43 | |||
44 | /** @var SQL_Model */ |
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45 | public $owner; |
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46 | |||
47 | /** |
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48 | * Implementation of generic setter-getter method which supports "UNDEFINED" |
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49 | * constant. This method is used by all other sette-getters. |
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50 | * |
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51 | * @param string $type Corresponds to the name of property of a field |
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52 | * @param mixed $value New value for a property. |
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53 | * |
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54 | * @return mixed|$this new or current property (if value is UNDEFINED) |
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55 | */ |
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56 | View Code Duplication | public function setterGetter($type, $value = UNDEFINED) |
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57 | { |
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58 | if ($value === UNDEFINED) { |
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59 | return isset($this->$type) ? $this->$type : null; |
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60 | } |
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61 | $this->$type = $value; |
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62 | |||
63 | return $this; |
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64 | } |
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65 | |||
66 | /** |
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67 | * Sets the value of the field. Identical to $model[$fieldname]=$value. |
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68 | * |
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69 | * @param mixed $value new value |
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70 | * |
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71 | * @return $this |
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72 | */ |
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73 | public function set($value = null) |
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74 | { |
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75 | $this->owner->set($this->short_name, $value); |
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76 | |||
77 | return $this; |
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78 | } |
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79 | |||
80 | /** |
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81 | * Get the value of the field of a loaded model. If model is not loaded |
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82 | * will return default value instead. |
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83 | * |
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84 | * @return mixed current value of a field |
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85 | */ |
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86 | View Code Duplication | public function get() |
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87 | { |
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88 | if ($this->owner->loaded() |
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89 | || isset($this->owner->data[$this->short_name]) |
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90 | ) { |
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91 | return $this->owner->get($this->short_name); |
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92 | } |
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93 | |||
94 | return $this->defaultValue(); |
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95 | } |
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96 | |||
97 | /** |
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98 | * If field is accidentally converted to string, provide some |
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99 | * descriptive information. |
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100 | * |
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101 | * @return string descriptive |
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102 | */ |
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103 | public function __toString() |
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104 | { |
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105 | return get_class($this)." ['".$this->short_name."']".' of '.$this->owner; |
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106 | } |
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107 | |||
108 | /** |
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109 | * Logical type of model field. This universal type is recognized by |
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110 | * view controllers (such as Controller_MVCForm, Controller_MVCGrid to |
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111 | * convert into supported field types. |
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112 | * |
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113 | * @param string $t new value |
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114 | * |
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115 | * @return string|$this current value if $t=UNDEFINED |
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116 | */ |
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117 | public function type($t = UNDEFINED) |
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121 | |||
122 | /** |
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123 | * Sets field caption which will be used by forms, grids and other view |
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124 | * elements as a label. The caption will be localized through $app->_(). |
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125 | * |
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126 | * @param string $t new value |
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127 | * |
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128 | * @return string|$this current value if $t=UNDEFINED |
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129 | */ |
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130 | View Code Duplication | public function caption($t = UNDEFINED) |
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131 | { |
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132 | if ($t === UNDEFINED && !$this->caption) { |
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133 | return ucwords(strtr( |
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134 | preg_replace('/_id$/', '', $this->short_name), |
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135 | '_', |
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136 | ' ' |
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137 | )); |
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138 | } |
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139 | |||
140 | return $this->setterGetter('caption', $t); |
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141 | } |
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142 | |||
143 | /** |
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144 | * Sets field hint which will be used by forms. |
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145 | * |
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146 | * @param string $t new value |
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147 | * |
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148 | * @return string|$this current value if $t=UNDEFINED |
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149 | */ |
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150 | public function hint($t = UNDEFINED) |
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151 | { |
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152 | return $this->setterGetter('hint', $t); |
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153 | } |
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154 | |||
155 | /** |
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156 | * Sets field placeholder (gray text inside input when it's empty). |
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157 | * |
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158 | * @param string $t new value |
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159 | * |
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160 | * @return string|$this current value if $t=UNDEFINED |
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161 | */ |
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162 | public function placeholder($t = UNDEFINED) |
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166 | |||
167 | /** |
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168 | * While you may use visible(), editable() to include or exclude fields |
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169 | * from appearing in certain scenarios, you can also define a group which |
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170 | * you then can display instead of listing all fields manually inside |
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171 | * setModel(). Read more about Actual Fields. |
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172 | * |
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173 | * @param string $t new value |
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174 | * |
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175 | * @return string|$this current value if $t=UNDEFINED |
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176 | */ |
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177 | public function group($t = UNDEFINED) |
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178 | { |
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179 | return $this->setterGetter('group', $t); |
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180 | } |
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181 | |||
182 | /** |
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183 | * Read only setting will affect the way how field is presented by views. |
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184 | * While model field is still writable directly, the Form will not try to |
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185 | * change the value of this field. |
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186 | * |
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187 | * @param bool $t new value |
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188 | * |
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189 | * @return bool|$this current value if $t=UNDEFINED |
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190 | */ |
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191 | public function readonly($t = UNDEFINED) |
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192 | { |
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193 | return $this->setterGetter('readonly', $t); |
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194 | } |
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195 | |||
196 | /** |
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197 | * Mandatory setting will affect the way how field is presented by views. |
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198 | * For example, form can display asterisk near the field or add additional |
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199 | * validation. |
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200 | * This property will not affect the direct use of the field inside |
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201 | * model. If you would like that your model complains about empty fields, |
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202 | * you should edit beforeSave hook. |
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203 | * |
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204 | * @param bool $t new value |
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205 | * |
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206 | * @return bool|$this current value if $t=UNDEFINED |
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207 | */ |
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208 | public function mandatory($t = UNDEFINED) |
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209 | { |
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210 | return $this->setterGetter('mandatory', $t); |
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211 | } |
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212 | |||
213 | /** |
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214 | * Set editable to false, if you want to exclude field from forms |
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215 | * or other means of editing data. This does not affect the actual model |
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216 | * values. |
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217 | * |
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218 | * @param bool $t new value |
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219 | * |
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220 | * @return bool|$this current value if $t=UNDEFINED |
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221 | */ |
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222 | public function editable($t = UNDEFINED) |
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223 | { |
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224 | return $this->setterGetter('editable', $t); |
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225 | } |
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226 | |||
227 | /** |
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228 | * Configures the behavior of Form to disable tag stripping form user input. |
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229 | * By default all tags are stripped, setting this property to true will |
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230 | * no longer strip tags. |
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231 | * |
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232 | * @param bool $t new value |
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233 | * |
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234 | * @return bool|$this current value if $t=UNDEFINED |
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235 | */ |
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236 | public function allowHTML($t = UNDEFINED) |
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237 | { |
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238 | return $this->setterGetter('allowHTML', $t); |
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239 | } |
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240 | |||
241 | /** |
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242 | * Setting searchable(true) will instruct Filter and similar views that |
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243 | * it should be possible to perform search by this field. |
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244 | * |
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245 | * @param bool $t new value |
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246 | * |
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247 | * @return bool|$this current value if $t=UNDEFINED |
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248 | */ |
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249 | public function searchable($t = UNDEFINED) |
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250 | { |
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251 | return $this->setterGetter('searchable', $t); |
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252 | } |
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253 | |||
254 | /** |
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255 | * Will instruct Grid and similar views that the sorting controls must be |
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256 | * enabled for this field. |
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257 | * |
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258 | * @param bool $t new value |
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259 | * |
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260 | * @return bool|$this current value if $t=UNDEFINED |
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261 | */ |
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262 | public function sortable($t = UNDEFINED) |
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263 | { |
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264 | return $this->setterGetter('sortable', $t); |
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265 | } |
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266 | |||
267 | /** |
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268 | * Normally views will attempt to pick most suitable way to present field. |
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269 | * For example, type='date' will be presented with DatePicker field in form. |
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270 | * You might be using add-ons or might have created your own field class. |
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271 | * If you would like to use it to present the field, use display(). If you |
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272 | * specify string it will be used by all views, otherwise specify it as |
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273 | * associtive array:. |
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274 | * |
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275 | * $field->display(array('form'=>'line','grid'=>'button')); |
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276 | * |
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277 | * @param mixed $t new value |
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278 | * |
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279 | * @return mixed|$this current value if $t=UNDEFINED |
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280 | */ |
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281 | public function display($t = UNDEFINED) |
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285 | |||
286 | /** |
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287 | * In most cases $model['field'] would match "field" inside a database. In |
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288 | * some cases, however, you would want to use different database field. This |
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289 | * can happen when you join multiple tables and 'field' appears in multiple |
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290 | * tables. |
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291 | * |
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292 | * You can specify actual field when you declare a field within a model: |
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293 | * |
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294 | * $model->addField('modelfield','dbfield'); |
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295 | * |
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296 | * If you are unable to use addField (such as using custom field class), |
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297 | * you can use actual() modifier: |
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298 | * |
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299 | * $model->add('filestore/File','modelfield')->actual('dbfield'); |
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300 | * |
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301 | * Another potential use is if your database structure does not match |
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302 | * model convention: |
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303 | * |
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304 | * $model->hasOne('Book')->actual('IDBOOK'); |
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305 | * |
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306 | * @param string $t new value |
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307 | * |
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308 | * @return string|$this current value if $t=UNDEFINED |
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309 | */ |
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310 | public function actual($t = UNDEFINED) |
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311 | { |
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312 | return $this->setterGetter('actual_field', $t); |
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313 | } |
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314 | |||
315 | /** |
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316 | * Marking field as system will cause it to always be loaded, even if |
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317 | * it's not requested through Actual Fields. It will also hide the field |
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318 | * making it dissapear from Grids and Forms. A good examples of system |
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319 | * fields are "id" or "created_dts". |
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320 | * |
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321 | * @param bool $t new value |
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322 | * |
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323 | * @return bool|$this current value if $t=UNDEFINED |
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324 | */ |
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325 | View Code Duplication | public function system($t = UNDEFINED) |
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326 | { |
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327 | if ($t === true) { |
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328 | $this->editable(false)->visible(false); |
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329 | } |
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330 | |||
331 | return $this->setterGetter('system', $t); |
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332 | } |
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333 | |||
334 | /** |
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335 | * Hide field. Not sure! |
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336 | * |
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337 | * @param bool $t new value |
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338 | * |
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339 | * @return bool|$this current value if $t=UNDEFINED |
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340 | */ |
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341 | public function hidden($t = UNDEFINED) |
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342 | { |
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343 | return $this->setterGetter('hidden', $t); |
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344 | } |
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345 | |||
346 | /** |
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347 | * This will provide a HTML settings on a field for maximum field size. |
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348 | * The length of a field will not be enforced by this setting. |
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349 | * |
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350 | * @param int $t new value |
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351 | * |
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352 | * @return int|$this current value if $t=UNDEFINED |
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353 | */ |
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354 | public function length($t = UNDEFINED) |
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355 | { |
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356 | return $this->setterGetter('length', $t); |
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357 | } |
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358 | |||
359 | /** |
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360 | * Default Value is used inside forms when you present them without loaded |
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361 | * data. This does not change how model works, which will simply avoid |
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362 | * including unchanged field into insert/update queries. |
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363 | * |
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364 | * @param bool $t new value |
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365 | * |
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366 | * @return bool|$this current value if $t=UNDEFINED |
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367 | */ |
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368 | View Code Duplication | public function defaultValue($t = UNDEFINED) |
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369 | { |
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370 | if ($t !== UNDEFINED) { |
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371 | $this->has_default_value = true; |
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372 | } |
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373 | |||
374 | return $this->setterGetter('defaultValue', $t); |
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375 | } |
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376 | |||
377 | /** |
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378 | * Controls field appearance in Grid or similar views. |
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379 | * |
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380 | * @param bool $t new value |
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381 | * |
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382 | * @return bool|$this current value if $t=UNDEFINED |
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383 | */ |
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384 | public function visible($t = UNDEFINED) |
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385 | { |
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386 | return $this->setterGetter('visible', $t); |
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387 | } |
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388 | |||
389 | /** |
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390 | * Supplies a list data for multi-value fields (selects, radio buttons, |
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391 | * checkbox area, autocomplete). You may also use enum(). This setting |
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392 | * is typically used with a static falues (Male / Female), if your field |
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393 | * values could be described through a different model, use setModel() |
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394 | * or better yet - hasOne(). |
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395 | * |
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396 | * @param array $t Array( id => val ) |
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397 | * |
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398 | * @return array|$this current value if $t=UNDEFINED |
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399 | */ |
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400 | View Code Duplication | public function listData($t = UNDEFINED) |
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401 | { |
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402 | if ($this->type() === 'boolean' && $t !== UNDEFINED) { |
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403 | $this->owner->addHook('afterLoad,afterUpdate,afterInsert', function ($m) use ($t) { |
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404 | // Normalize boolean data |
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405 | $val = !array_search($m->data[$this->short_name], $t); |
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406 | if ($val === false) { |
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407 | return; |
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408 | } // do nothing |
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409 | $m->data[$this->short_name] = (boolean) $val; |
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410 | }); |
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411 | |||
412 | $this->owner->addHook('beforeUpdate,beforeInsert', function ($m, &$data) use ($t) { |
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413 | // De-Normalize boolean data |
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414 | $val = (int) (!$m->get($this->short_name)); |
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415 | if (!isset($t[$val])) { |
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416 | return; |
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417 | } // do nothing |
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418 | $data->set($this->short_name, $t[$val]); |
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419 | }); |
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420 | } |
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421 | |||
422 | return $this->setterGetter('listData', $t); |
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423 | } |
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424 | |||
425 | /** |
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426 | * What to display when nothing is selected or entered? This will be |
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427 | * displayed on a drop-down when no value is selected: ("Choose ..") |
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428 | * if you are using this setting with a text field it will set a |
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429 | * placeholder HTML property. |
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430 | * |
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431 | * @param string $t new value |
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432 | * |
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433 | * @return string|$this current value if $t=UNDEFINED |
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434 | */ |
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435 | public function emptyText($t = UNDEFINED) |
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436 | { |
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437 | return $this->setterGetter('emptyText', $t); |
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438 | } |
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439 | |||
440 | /** |
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441 | * Pass a callback to onField() which is executed with the argument |
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442 | * containing a field view, when model is associated with a form. |
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443 | * |
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444 | * @param callback $c new value |
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445 | * |
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446 | * @return string|$this current value if $t=UNDEFINED |
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447 | */ |
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448 | public function onField($c = UNDEFINED) |
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449 | { |
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450 | return $this->setterGetter('onField', $c); |
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451 | } |
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452 | |||
453 | /** |
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454 | * Will execute setModel() on a field. Some fields will change their |
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455 | * behaviour with this. The value is a string (either Model_Book or Book) |
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456 | * but you might be able to use object also. |
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457 | * |
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458 | * I suggest to use $model->hasOne($model) instead of setModel($model) |
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459 | * |
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460 | * @param string $t new value |
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461 | * |
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462 | * @return string|$this current value if $t=UNDEFINED |
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463 | */ |
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464 | public function setModel($t = UNDEFINED) |
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465 | { |
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466 | return $this->setterGetter('theModel', $t); |
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467 | } |
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468 | |||
469 | /** |
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470 | * Returns current model. This is different than other setters getters, |
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471 | * but it's done to keep consistency with the rest of Agile Toolkit. |
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472 | * |
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473 | * @return string current associated model Class |
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474 | */ |
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475 | public function getModel() |
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479 | |||
480 | /** |
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481 | * Same as listData(). |
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482 | * |
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483 | * @param array $t Array( id => val ) |
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484 | * |
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485 | * @return array current value if $t=UNDEFINED |
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486 | */ |
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487 | public function setValueList($t) |
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488 | { |
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489 | return $this->listData($t); |
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490 | } |
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491 | |||
492 | /** |
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493 | * Similar to listData() but accepts array of values instead of hash:. |
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494 | * |
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495 | * listData(array(1=>'Male', 2=>'Female')); |
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496 | * enum(array('male','female')); |
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497 | * |
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498 | * The value will be stored in database and also displayed to user. |
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499 | * |
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500 | * @param array $t Array( id => val ) |
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501 | * |
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502 | * @return $this |
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503 | */ |
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504 | public function enum($t) |
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508 | |||
509 | /** |
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510 | * Binds the field to a relation (returned by join() function). |
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511 | * |
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512 | * @param mixed $m the result of join() function |
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513 | * |
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514 | * @return $this|object or the relation if $m is UNDEFINED |
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515 | */ |
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516 | public function from($m = UNDEFINED) |
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517 | { |
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518 | if ($m === UNDEFINED) { |
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519 | return $this->relation; |
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520 | } elseif (is_object($m)) { |
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521 | $this->relation = $m; |
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522 | } else { |
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523 | $this->relations = $this->owner->relations[$m]; |
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524 | } |
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525 | |||
526 | return $this; |
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527 | } |
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528 | |||
529 | /** |
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530 | * Modifies specified query to include this particular field. |
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531 | * |
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532 | * @param DB_dsql $select |
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533 | * |
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534 | * @return $this |
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535 | */ |
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536 | public function updateSelectQuery($select) |
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537 | { |
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538 | $p = null; |
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539 | if (!empty($this->owner->relations)) { |
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540 | $p = $this->owner->table_alias ?: $this->owner->table; |
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541 | } |
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542 | |||
543 | if ($this->relation) { |
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544 | $select->field($this->actual_field ?: $this->short_name, $this->relation->short_name, $this->short_name); |
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545 | } elseif (!(is_null($this->actual_field)) && $this->actual_field != $this->short_name) { |
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546 | $select->field($this->actual_field, $p, $this->short_name); |
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547 | |||
548 | return $this; |
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549 | } else { |
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550 | $select->field($this->short_name, $p); |
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551 | } |
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552 | |||
553 | return $this; |
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554 | } |
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555 | |||
556 | /** |
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557 | * Modify insert query to set value of this field. |
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558 | * |
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559 | * @param DB_dsql $insert |
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560 | * |
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561 | * @return $this |
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562 | */ |
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563 | View Code Duplication | public function updateInsertQuery($insert) |
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564 | { |
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565 | if ($this->relation) { |
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566 | $insert = $this->relation->dsql; |
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567 | } |
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568 | |||
569 | $insert->set( |
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570 | $this->actual_field ?: $this->short_name, |
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571 | $this->getSQL() |
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572 | ); |
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573 | |||
574 | return $this; |
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575 | } |
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576 | |||
577 | /** |
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578 | * Modify update query to set value of this field. |
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579 | * |
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580 | * @param DB_dsql $modify |
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581 | * |
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582 | * @return $this |
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583 | */ |
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584 | View Code Duplication | public function updateModifyQuery($modify) |
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597 | |||
598 | /** |
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599 | * Converts true/false into boolean representation according to the "enum". |
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600 | * |
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601 | * @param mixed $value |
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602 | * |
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603 | * @return int |
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604 | */ |
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605 | View Code Duplication | public function getBooleanValue($value) |
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606 | { |
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607 | if ($value === null) { |
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608 | return; |
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609 | } |
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610 | if ($this->listData) { |
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611 | reset($this->listData); |
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612 | list(, $yes_value) = each($this->listData); |
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613 | list(, $no_value) = each($this->listData); |
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614 | if ($no_value === null) { |
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615 | $no_value = ''; |
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616 | } |
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617 | /* not to convert N to Y */ |
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618 | if ($yes_value == $value) { |
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619 | return $yes_value; |
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620 | } |
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621 | if ($no_value == $value) { |
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622 | return $no_value; |
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623 | } |
||
624 | } else { |
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625 | $yes_value = 1; |
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626 | $no_value = 0; |
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627 | } |
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628 | |||
629 | return $value ? $yes_value : $no_value; |
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630 | } |
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631 | |||
632 | /** |
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633 | * Get value of this field formatted for SQL. Redefine if you need to convert. |
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634 | * |
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635 | * @return mixed |
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636 | */ |
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637 | public function getSQL() |
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638 | { |
||
639 | $val = $this->owner->get($this->short_name); |
||
640 | if ($this->type == 'boolean') { |
||
641 | $val = $this->getBooleanValue($val); |
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642 | } |
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643 | if ($val == '' |
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644 | && !$this->mandatory |
||
645 | && ($this->listData || $this instanceof Field_Reference) |
||
646 | && $this->type != 'boolean' |
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647 | ) { |
||
648 | $val = null; |
||
649 | } |
||
650 | |||
651 | return $val; |
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652 | } |
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653 | |||
654 | /** |
||
655 | * Returns field of this model. |
||
656 | * |
||
657 | * @return string |
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658 | */ |
||
659 | public function getExpr() |
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660 | { |
||
661 | $q = $this->owner->_dsql(); |
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662 | |||
663 | return $q->bt($this->relation ? $this->relation->short_name : $q->main_table).'.'. |
||
664 | $q->bt($this->actual_field ?: $this->short_name); |
||
665 | } |
||
666 | |||
667 | |||
668 | |||
669 | // {{{ Deprecated methods |
||
670 | |||
671 | /** |
||
672 | * @deprecated 4.3.0 use mandatory() instead |
||
673 | * |
||
674 | * @param bool $t new value |
||
675 | * |
||
676 | * @return bool|$this current value if $t=UNDEFINED |
||
677 | */ |
||
678 | public function required($t = UNDEFINED) |
||
679 | { |
||
680 | return $this->mandatory($t); |
||
681 | } |
||
682 | |||
683 | /** @deprecated 4.3.0 use hasOne instead */ |
||
684 | public function refModel($m) |
||
698 | |||
699 | /** @deprecated 4.3.0 use type($v) instead */ |
||
700 | public function datatype($v = UNDEFINED) |
||
704 | |||
705 | /** @deprecated 4.3.0 use addExpression() instead */ |
||
706 | public function calculated($v = UNDEFINED) |
||
707 | { |
||
708 | throw $this->exception('calculated() field property is obsolete. Use addExpression() instead'); |
||
709 | } |
||
710 | |||
711 | // }}} |
||
712 | } |
||
713 |