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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35 | trait UserRelationTrait |
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36 | { |
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37 | use mb { |
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38 | mb::addBlame as addGroup; |
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39 | mb::createBlame as createGroup; |
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40 | mb::addOrCreateBlame as addOrCreateGroup; |
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41 | mb::removeBlame as removeGroup; |
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42 | mb::removeAllBlames as removeAllGroups; |
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43 | mb::getBlame as getGroup; |
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44 | mb::getOrCreateBlame as getOrCreateGroup; |
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45 | mb::getBlameds as getGroupMembers; |
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46 | mb::getBlameGuids as getGroupGuids; |
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47 | mb::setBlameGuids as setGroupGuids; |
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48 | mb::getAllBlames as getAllGroups; |
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49 | mb::getNonBlameds as getNonGroupMembers; |
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50 | mb::getBlamesCount as getGroupsCount; |
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51 | mb::getMultipleBlameableAttributeRules as getGroupsRules; |
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52 | mb::getEmptyBlamesJson as getEmptyGroupJson; |
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53 | } |
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54 | |||
55 | /** |
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56 | * @var string the another party of the relation. |
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57 | */ |
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58 | public $otherGuidAttribute = 'other_guid'; |
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59 | |||
60 | /** |
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61 | * @var string |
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62 | */ |
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63 | public $remarkAttribute = 'remark'; |
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64 | public static $relationSingle = 0; |
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65 | public static $relationMutual = 1; |
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66 | public $relationType = 1; |
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67 | public $relationTypes = [ |
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68 | 0 => 'Single', |
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69 | 1 => 'Mutual', |
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70 | ]; |
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71 | |||
72 | /** |
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73 | * @var string the attribute name of which determines the relation type. |
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74 | */ |
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75 | public $mutualTypeAttribute = 'type'; |
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76 | public static $mutualTypeNormal = 0x00; |
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77 | public static $mutualTypeSuspend = 0x01; |
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78 | |||
79 | /** |
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80 | * @var array Mutual types. |
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81 | */ |
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82 | public static $mutualTypes = [ |
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83 | 0x00 => 'Normal', |
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84 | 0x01 => 'Suspend', |
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85 | ]; |
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86 | |||
87 | /** |
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88 | * @var string the attribute name of which determines the `favorite` field. |
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89 | */ |
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90 | public $favoriteAttribute = 'favorite'; |
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91 | |||
92 | /** |
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93 | * Permit to build self relation. |
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94 | * @var boolean |
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95 | */ |
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96 | public $relationSelf = false; |
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97 | |||
98 | /** |
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99 | * Get whether this relation is favorite or not. |
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100 | * @return boolean |
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101 | */ |
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102 | 1 | public function getIsFavorite() |
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107 | |||
108 | /** |
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109 | * Set favorite. |
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110 | * @param boolean $fav |
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111 | */ |
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112 | 1 | public function setIsFavorite($fav) |
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117 | |||
118 | /** |
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119 | * @inheritdoc |
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120 | */ |
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121 | 8 | public function rules() |
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125 | |||
126 | /** |
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127 | * Validation rules associated with user relation. |
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128 | * @return array rules. |
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129 | */ |
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130 | 8 | public function getUserRelationRules() |
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141 | |||
142 | /** |
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143 | * Get remark. |
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144 | * @return string remark. |
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145 | */ |
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146 | public function getRemark() |
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151 | |||
152 | /** |
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153 | * Set remark. |
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154 | * @param string $remark |
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155 | * @return string remark. |
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156 | */ |
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157 | public function setRemark($remark) |
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162 | |||
163 | /** |
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164 | * Validation rules associated with remark attribute. |
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165 | * @return array rules. |
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166 | */ |
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167 | 8 | public function getRemarkRules() |
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174 | |||
175 | /** |
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176 | * Validation rules associated with favorites attribute. |
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177 | * @return array rules. |
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178 | */ |
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179 | 8 | public function getFavoriteRules() |
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186 | |||
187 | /** |
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188 | * Validation rules associated with other guid attribute. |
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189 | * @return array rules. |
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190 | */ |
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191 | 8 | public function getOtherGuidRules() |
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200 | |||
201 | /** |
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202 | * Attach events associated with user relation. |
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203 | */ |
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204 | 8 | public function initUserRelationEvents() |
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214 | |||
215 | /** |
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216 | * Get opposite relation to self. |
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217 | * @return \vistart\Models\models\BaseUserRelationModel |
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218 | */ |
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219 | 7 | public function getOpposite() |
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228 | |||
229 | /** |
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230 | * Build a suspend mutual relation, not support single relation. |
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231 | * @param BaseUserModel|string $user Initiator or its GUID. |
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232 | * @param BaseUserModel|string $other Recipient or its GUID. |
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233 | * @return \vistart\Models\models\BaseUserRelationModel The relation will be |
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234 | * given if exists, or return a new relation. |
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235 | */ |
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236 | 1 | public static function buildSuspendRelation($user, $other) |
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243 | |||
244 | /** |
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245 | * Build a normal relation. |
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246 | * @param BaseUserModel|string $user Initiator or its GUID. |
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247 | * @param BaseUserModel|string $other Recipient or its GUID. |
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248 | * @return \vistart\Models\models\BaseUserRelationModel The relation will be |
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249 | * given if exists, or return a new relation. |
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250 | */ |
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251 | 8 | public static function buildNormalRelation($user, $other) |
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260 | |||
261 | /** |
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262 | * Build relation between initiator and recipient. |
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263 | * @param BaseUserModel|string $user Initiator or its GUID. |
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264 | * @param BaseUserModel|string $other Recipient or its GUID. |
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265 | * @return \vistart\Models\models\BaseUserRelationModel The relation will be |
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266 | * given if exists, or return a new relation. Or return null if not allowed |
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267 | * to build self relation, |
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268 | */ |
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269 | 8 | protected static function buildRelation($user, $other) |
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292 | |||
293 | /** |
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294 | * Build opposite relation throughout the current relation. The opposite |
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295 | * relation will be given if existed. |
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296 | * @param \vistart\Models\models\BaseUserRelationModel $relation |
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297 | * @return \vistart\Models\models\BaseUserRelationModel |
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298 | */ |
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299 | 7 | protected static function buildOppositeRelation($relation) |
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315 | |||
316 | /** |
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317 | * Remove myself. |
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318 | * @return integer|false The number of relations removed, or false if the remove |
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319 | * is unsuccessful for some reason. Note that it is possible the number of relations |
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320 | * removed is 0, even though the remove execution is successful. |
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321 | */ |
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322 | 2 | public function remove() |
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326 | |||
327 | /** |
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328 | * Remove first relation between initiator(s) and recipient(s). |
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329 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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330 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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331 | * @return integer|false The number of relations removed. |
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332 | */ |
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333 | 1 | public static function removeOneRelation($user, $other) |
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337 | |||
338 | /** |
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339 | * Remove all relations between initiator(s) and recipient(s). |
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340 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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341 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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342 | * @return integer The number of relations removed. |
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343 | */ |
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344 | 2 | public static function removeAllRelations($user, $other) |
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351 | |||
352 | /** |
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353 | * Get first relation between initiator(s) and recipient(s). |
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354 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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355 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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356 | * @return \vistart\Models\models\BaseUserRelationModel |
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357 | */ |
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358 | 1 | public static function findOneRelation($user, $other) |
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362 | |||
363 | /** |
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364 | * Get first opposite relation between initiator(s) and recipient(s). |
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365 | * @param BaseUserModel|string $user Initiator or its guid, or array of them. |
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366 | * @param BaseUserModel|string $other Recipient or its guid, or array of them. |
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367 | * @return \vistart\Models\models\BaseUserRelationModel |
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368 | */ |
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369 | 7 | public static function findOneOppositeRelation($user, $other) |
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373 | |||
374 | /** |
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375 | * Get user's or users' all relations, or by specified groups. |
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376 | * @param BaseUserModel|string|array $user Initiator or its GUID, or Initiators or their GUIDs. |
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377 | * @param BaseUserRelationGroupModel|string|array|null $groups UserRelationGroup or its guid, or array of them. If you do not want to delimit the groups, please assign null. |
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378 | * @return array all eligible relations |
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379 | */ |
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380 | public static function findOnesAllRelations($user, $groups = null) |
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384 | |||
385 | /** |
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386 | * Initialize groups attribute. |
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387 | * @param \yii\base\Event $event |
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388 | */ |
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389 | 8 | public function onInitGroups($event) |
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394 | |||
395 | /** |
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396 | * Initialize remark attribute. |
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397 | * @param \yii\base\Event $event |
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398 | */ |
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399 | 8 | public function onInitRemark($event) |
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405 | |||
406 | /** |
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407 | * The event triggered after insert new relation. |
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408 | * The opposite relation should be inserted without triggering events |
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409 | * simultaneously after new relation inserted, |
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410 | * @param \yii\base\Event $event |
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411 | */ |
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412 | 8 | public function onInsertRelation($event) |
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424 | |||
425 | /** |
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426 | * The event triggered after update relation. |
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427 | * The opposite relation should be updated without triggering events |
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428 | * simultaneously after existed relation removed. |
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429 | * @param \yii\base\Event $event |
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430 | */ |
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431 | 3 | public function onUpdateRelation($event) |
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443 | |||
444 | /** |
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445 | * The event triggered after delete relation. |
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446 | * The opposite relation should be deleted without triggering events |
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447 | * simultaneously after existed relation removed. |
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448 | * @param \yii\base\Event $event |
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449 | */ |
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450 | 2 | public function onDeleteRelation($event) |
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461 | } |
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462 |
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.