Complex classes like UserRelationTrait 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 UserRelationTrait, and based on these observations, apply Extract Interface, too.
1 | <?php |
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48 | trait UserRelationTrait |
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49 | { |
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50 | use mb, |
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51 | MutualTrait { |
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52 | mb::addBlame as addGroup; |
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53 | mb::createBlame as createGroup; |
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54 | mb::addOrCreateBlame as addOrCreateGroup; |
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55 | mb::removeBlame as removeGroup; |
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56 | mb::removeAllBlames as removeAllGroups; |
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57 | mb::getBlame as getGroup; |
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58 | mb::getOrCreateBlame as getOrCreateGroup; |
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59 | mb::getBlameds as getGroupMembers; |
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60 | mb::getBlameGuids as getGroupGuids; |
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61 | mb::setBlameGuids as setGroupGuids; |
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62 | mb::getAllBlames as getAllGroups; |
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63 | mb::getNonBlameds as getNonGroupMembers; |
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64 | mb::getBlamesCount as getGroupsCount; |
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65 | mb::getMultipleBlameableAttributeRules as getGroupsRules; |
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66 | } |
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67 | |||
68 | /** |
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69 | * @var string |
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70 | */ |
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71 | public $remarkAttribute = 'remark'; |
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72 | public static $relationSingle = 0; |
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73 | public static $relationMutual = 1; |
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74 | public $relationType = 1; |
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75 | public $relationTypes = [ |
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76 | 0 => 'Single', |
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77 | 1 => 'Mutual', |
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78 | ]; |
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79 | |||
80 | /** |
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81 | * @var string the attribute name of which determines the relation type. |
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82 | */ |
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83 | public $mutualTypeAttribute = 'type'; |
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84 | public static $mutualTypeNormal = 0x00; |
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85 | public static $mutualTypeSuspend = 0x01; |
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86 | |||
87 | /** |
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88 | * @var array Mutual types. |
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89 | */ |
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90 | public static $mutualTypes = [ |
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91 | 0x00 => 'Normal', |
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92 | 0x01 => 'Suspend', |
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93 | ]; |
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94 | |||
95 | /** |
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96 | * @var string the attribute name of which determines the `favorite` field. |
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97 | */ |
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98 | public $favoriteAttribute = 'favorite'; |
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99 | |||
100 | /** |
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101 | * Permit to build self relation. |
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102 | * @var boolean |
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103 | */ |
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104 | public $relationSelf = false; |
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105 | |||
106 | /** |
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107 | * Get whether this relation is favorite or not. |
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108 | * @return boolean |
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109 | */ |
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110 | 1 | public function getIsFavorite() |
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115 | |||
116 | /** |
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117 | * Set favorite. |
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118 | * @param boolean $fav |
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119 | */ |
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120 | 1 | public function setIsFavorite($fav) |
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125 | |||
126 | /** |
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127 | * @inheritdoc |
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128 | */ |
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129 | 15 | public function rules() |
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133 | |||
134 | /** |
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135 | * Validation rules associated with user relation. |
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136 | * @return array rules. |
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137 | */ |
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138 | 15 | public function getUserRelationRules() |
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149 | |||
150 | /** |
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151 | * Get remark. |
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152 | * @return string remark. |
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153 | */ |
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154 | 1 | public function getRemark() |
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159 | |||
160 | /** |
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161 | * Set remark. |
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162 | * @param string $remark |
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163 | * @return string remark. |
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164 | */ |
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165 | 1 | public function setRemark($remark) |
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170 | |||
171 | /** |
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172 | * Validation rules associated with remark attribute. |
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173 | * @return array rules. |
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174 | */ |
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175 | 15 | public function getRemarkRules() |
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182 | |||
183 | /** |
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184 | * Validation rules associated with favorites attribute. |
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185 | * @return array rules. |
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186 | */ |
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187 | 15 | public function getFavoriteRules() |
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194 | |||
195 | /** |
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196 | * Validation rules associated with other guid attribute. |
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197 | * @return array rules. |
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198 | */ |
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199 | 15 | public function getOtherGuidRules() |
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206 | |||
207 | /** |
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208 | * Attach events associated with user relation. |
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209 | */ |
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210 | 16 | public function initUserRelationEvents() |
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220 | |||
221 | /** |
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222 | * Get opposite relation against self. |
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223 | * @return static |
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224 | */ |
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225 | 1 | public function getOpposite() |
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234 | |||
235 | /** |
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236 | * Check whether the initiator is followed by recipient. |
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237 | * @param BaseUserModel $initiator |
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238 | * @param BaseUserModel $recipient |
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239 | * @return boolean |
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240 | */ |
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241 | 3 | public static function isFollowed($initiator, $recipient) |
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245 | |||
246 | /** |
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247 | * Check whether the initiator is following recipient. |
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248 | * @param BaseUserModel $initiator |
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249 | * @param BaseUserModel $recipient |
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250 | * @return boolean |
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251 | */ |
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252 | 3 | public static function isFollowing($initiator, $recipient) |
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256 | |||
257 | /** |
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258 | * Check whether the initiator is following and followed by recipient mutually (Single Relation). |
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259 | * Or check whether the initiator and recipient are friend whatever the mutual type is normal or suspend. |
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260 | * @param BaseUserModel $initiator |
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261 | * @param BaseUserModel $recipient |
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262 | * @return boolean |
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263 | */ |
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264 | 2 | public static function isMutual($initiator, $recipient) |
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268 | |||
269 | /** |
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270 | * Check whether the initiator is following and followed by recipient mutually (Single Relation). |
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271 | * Or check whether the initiator and recipient are friend if the mutual type is normal. |
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272 | * @param BaseUserModel $initiator |
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273 | * @param BaseUserModel $recipient |
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274 | * @return boolean |
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275 | */ |
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276 | 1 | public static function isFriend($initiator, $recipient) |
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291 | |||
292 | /** |
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293 | * Build new or return existed suspend mutual relation, or return null if |
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294 | * current type is not mutual. |
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295 | * @see buildRelation() |
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296 | * @param BaseUserModel|string $user Initiator or its GUID. |
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297 | * @param BaseUserModel|string $other Recipient or its GUID. |
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298 | * @return static The relation will be |
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299 | * given if exists, or return a new relation. |
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300 | */ |
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301 | 1 | public static function buildSuspendRelation($user, $other) |
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311 | |||
312 | /** |
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313 | * Build new or return existed normal relation. |
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314 | * The status of mutual relation will be changed to normal if it is not. |
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315 | * @see buildRelation() |
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316 | * @param BaseUserModel|string $user Initiator or its GUID. |
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317 | * @param BaseUserModel|string $other Recipient or its GUID. |
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318 | * @return static The relation will be |
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319 | * given if exists, or return a new relation. |
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320 | */ |
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321 | 16 | public static function buildNormalRelation($user, $other) |
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333 | |||
334 | /** |
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335 | * Build new or return existed relation between initiator and recipient. |
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336 | * If relation between initiator and recipient is not found, new relation will |
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337 | * be built. If initiator and recipient are the same one and it is not allowed |
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338 | * to build self relation, null will be given. |
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339 | * If you want to know whether the relation exists, you can check the return |
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340 | * value of `getIsNewRecord()` method. |
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341 | * @param BaseUserModel|string $user Initiator or its GUID. |
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342 | * @param BaseUserModel|string $other Recipient or its GUID. |
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343 | * @return static The relation will be |
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344 | * given if exists, or return a new relation. Or return null if not allowed |
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345 | * to build self relation, |
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346 | */ |
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347 | 16 | protected static function buildRelation($user, $other) |
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370 | |||
371 | /** |
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372 | * Build opposite relation throughout the current relation. The opposite |
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373 | * relation will be given if existed. |
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374 | * @param static $relation |
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375 | * @return static |
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376 | */ |
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377 | protected static function buildOppositeRelation($relation) |
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393 | |||
394 | /** |
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395 | * Remove myself. |
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396 | * @return integer|false The number of relations removed, or false if the remove |
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397 | * is unsuccessful for some reason. Note that it is possible the number of relations |
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398 | * removed is 0, even though the remove execution is successful. |
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399 | */ |
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400 | 16 | public function remove() |
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404 | |||
405 | /** |
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406 | * Remove first relation between initiator(s) and recipient(s). |
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407 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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408 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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409 | * @return integer|false The number of relations removed. |
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410 | */ |
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411 | 1 | public static function removeOneRelation($user, $other) |
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415 | |||
416 | /** |
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417 | * Remove all relations between initiator(s) and recipient(s). |
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418 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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419 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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420 | * @return integer The number of relations removed. |
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421 | */ |
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422 | 1 | public static function removeAllRelations($user, $other) |
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429 | |||
430 | /** |
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431 | * Get first relation between initiator(s) and recipient(s). |
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432 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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433 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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434 | * @return static |
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435 | */ |
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436 | 4 | public static function findOneRelation($user, $other) |
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440 | |||
441 | /** |
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442 | * Get first opposite relation between initiator(s) and recipient(s). |
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443 | * @param BaseUserModel|string $user Initiator or its guid, or array of them. |
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444 | * @param BaseUserModel|string $other Recipient or its guid, or array of them. |
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445 | * @return static |
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446 | */ |
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447 | 1 | public static function findOneOppositeRelation($user, $other) |
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451 | |||
452 | /** |
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453 | * Get user's or users' all relations, or by specified groups. |
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454 | * @param BaseUserModel|string|array $user Initiator or its GUID, or Initiators or their GUIDs. |
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455 | * @param BaseUserRelationGroupModel|string|array|null $groups UserRelationGroup |
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456 | * or its guid, or array of them. If you do not want to delimit the groups, please assign null. |
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457 | * @return array all eligible relations |
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458 | */ |
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459 | 1 | public static function findOnesAllRelations($user, $groups = null) |
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463 | |||
464 | /** |
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465 | * Initialize groups attribute. |
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466 | * @param ModelEvent $event |
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467 | */ |
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468 | 16 | public function onInitGroups($event) |
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473 | |||
474 | /** |
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475 | * Initialize remark attribute. |
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476 | * @param ModelEvent $event |
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477 | */ |
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478 | 16 | public function onInitRemark($event) |
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484 | |||
485 | /** |
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486 | * The event triggered after insert new relation. |
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487 | * The opposite relation should be inserted without triggering events |
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488 | * simultaneously after new relation inserted, |
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489 | * @param ModelEvent $event |
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490 | */ |
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491 | 15 | public function onInsertRelation($event) |
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503 | |||
504 | /** |
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505 | * The event triggered after update relation. |
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506 | * The opposite relation should be updated without triggering events |
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507 | * simultaneously after existed relation removed. |
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508 | * @param ModelEvent $event |
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509 | */ |
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510 | 2 | public function onUpdateRelation($event) |
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522 | |||
523 | /** |
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524 | * The event triggered after delete relation. |
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525 | * The opposite relation should be deleted without triggering events |
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526 | * simultaneously after existed relation removed. |
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527 | * @param ModelEvent $event |
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528 | */ |
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529 | 16 | public function onDeleteRelation($event) |
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540 | } |
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541 |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idable
provides a methodequalsId
that in turn relies on the methodgetId()
. If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()
as an abstract method to the trait will make sure it is available.