Complex classes like Relationship 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 Relationship, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 33 | class Relationship extends BaseObject implements RelationshipInterface |
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| 34 | { |
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| 35 | /** |
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| 36 | * The element the relations are related to |
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| 37 | * |
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| 38 | * @var ElementInterface|null |
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| 39 | */ |
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| 40 | private $element; |
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| 41 | |||
| 42 | /** |
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| 43 | * The field which accesses the relations |
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| 44 | * |
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| 45 | * @var RelationalInterface|Field |
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| 46 | */ |
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| 47 | private $field; |
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| 48 | |||
| 49 | /** |
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| 50 | * @var Collection|null |
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| 51 | */ |
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| 52 | private $relations; |
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| 53 | |||
| 54 | /** |
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| 55 | * @var bool |
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| 56 | */ |
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| 57 | protected $mutated = false; |
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| 58 | |||
| 59 | /** |
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| 60 | * @param ElementInterface|null $element |
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| 61 | * @param RelationalInterface $field |
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| 62 | * @param array $config |
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| 63 | */ |
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| 64 | public function __construct(RelationalInterface $field, ElementInterface $element = null, array $config = []) |
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| 71 | |||
| 72 | |||
| 73 | /************************************************************ |
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| 74 | * QUERY |
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| 75 | ************************************************************/ |
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| 76 | |||
| 77 | /** |
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| 78 | * @param Association|ElementInterface|int|string $object |
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| 79 | * @return Association |
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| 80 | */ |
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| 81 | public function findOrCreate($object): Association |
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| 89 | |||
| 90 | /** |
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| 91 | * @param Association|ElementInterface|int|string $object |
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| 92 | * @return Association |
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| 93 | * @throws Exception |
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| 94 | */ |
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| 95 | public function findOrFail($object): Association |
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| 103 | |||
| 104 | /** |
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| 105 | * @param Association|ElementInterface|int|string|null $object |
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| 106 | * @return Association|null |
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| 107 | */ |
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| 108 | public function findOne($object = null) |
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| 116 | |||
| 117 | /************************************************************ |
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| 118 | * COLLECTIONS |
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| 119 | ************************************************************/ |
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| 120 | |||
| 121 | /** |
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| 122 | * @return Collection |
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| 123 | */ |
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| 124 | public function getCollection(): Collection |
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| 147 | |||
| 148 | /** |
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| 149 | * @inheritDoc |
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| 150 | */ |
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| 151 | public function getRelationships(): Collection |
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| 159 | |||
| 160 | /** |
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| 161 | * @return Collection |
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| 162 | */ |
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| 163 | protected function existingRelationships() |
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| 169 | |||
| 170 | |||
| 171 | /************************************************************ |
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| 172 | * QUERY |
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| 173 | ************************************************************/ |
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| 174 | |||
| 175 | /** |
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| 176 | * @return ElementQueryInterface |
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| 177 | */ |
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| 178 | public function getQuery(): ElementQueryInterface |
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| 182 | |||
| 183 | /************************************************************ |
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| 184 | * ADD / REMOVE |
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| 185 | ************************************************************/ |
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| 186 | |||
| 187 | /** |
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| 188 | * @inheritDoc |
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| 189 | */ |
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| 190 | public function add($objects, array $attributes = []): RelationshipInterface |
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| 198 | |||
| 199 | /** |
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| 200 | * @param $object |
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| 201 | * @param array $attributes |
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| 202 | * @return RelationshipInterface |
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| 203 | */ |
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| 204 | protected function addOne($object, array $attributes = []): RelationshipInterface |
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| 234 | |||
| 235 | /** |
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| 236 | * @inheritDoc |
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| 237 | */ |
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| 238 | public function remove($objects): RelationshipInterface |
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| 248 | |||
| 249 | |||
| 250 | /******************************************* |
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| 251 | * SAVE |
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| 252 | *******************************************/ |
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| 253 | |||
| 254 | /** |
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| 255 | * @return bool |
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| 256 | */ |
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| 257 | public function save(): bool |
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| 289 | |||
| 290 | |||
| 291 | /************************************************************ |
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| 292 | * UTILITIES |
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| 293 | ************************************************************/ |
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| 294 | |||
| 295 | /** |
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| 296 | * @inheritDoc |
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| 297 | */ |
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| 298 | public function clear(): RelationshipInterface |
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| 303 | |||
| 304 | /** |
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| 305 | * @inheritDoc |
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| 306 | */ |
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| 307 | public function reset(): RelationshipInterface |
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| 313 | |||
| 314 | /** |
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| 315 | * @inheritDoc |
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| 316 | */ |
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| 317 | public function isMutated(): bool |
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| 321 | |||
| 322 | /** |
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| 323 | * @inheritDoc |
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| 324 | */ |
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| 325 | public function exists($object): bool |
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| 329 | |||
| 330 | /** |
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| 331 | * @inheritDoc |
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| 332 | */ |
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| 333 | public function count() |
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| 337 | |||
| 338 | |||
| 339 | /************************************************************ |
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| 340 | * DELTA |
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| 341 | ************************************************************/ |
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| 342 | |||
| 343 | /** |
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| 344 | * @inheritDoc |
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| 345 | */ |
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| 346 | protected function delta(): array |
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| 377 | |||
| 378 | /** |
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| 379 | * @param Association $new |
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| 380 | * @param Association $existing |
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| 381 | * @return bool |
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| 382 | */ |
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| 383 | private function hasChanged(Association $new, Association $existing): bool |
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| 388 | |||
| 389 | /** |
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| 390 | * @param Association $from |
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| 391 | * @param Association $to |
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| 392 | * |
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| 393 | * @return Association |
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| 394 | */ |
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| 395 | private function sync(Association $to, Association $from): Association |
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| 403 | |||
| 404 | |||
| 405 | /******************************************* |
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| 406 | * RESOLVERS |
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| 407 | *******************************************/ |
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| 408 | |||
| 409 | /** |
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| 410 | * Ensure we're working with an array of objects, not configs, etc |
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| 411 | * |
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| 412 | * @param array|QueryInterface|Collection|ElementInterface|Association $objects |
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| 413 | * @return array |
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| 414 | */ |
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| 415 | protected function objectArray($objects): array |
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| 428 | |||
| 429 | |||
| 430 | /******************************************* |
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| 431 | * COLLECTION UTILS |
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| 432 | *******************************************/ |
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| 433 | |||
| 434 | /** |
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| 435 | * @param Association[] $associations |
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| 436 | * @param bool $mutated |
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| 437 | * @return static |
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| 438 | */ |
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| 439 | protected function newRelations(array $associations, bool $mutated = true): self |
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| 446 | |||
| 447 | /** |
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| 448 | * @param Association $association |
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| 449 | * @return static |
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| 450 | */ |
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| 451 | protected function addToRelations(Association $association): self |
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| 452 | { |
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| 453 | $this->insertCollection($this->getRelationships(), $association); |
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| 454 | $this->mutated = true; |
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| 455 | |||
| 456 | return $this; |
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| 457 | } |
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| 458 | |||
| 459 | /** |
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| 460 | * @param int $key |
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| 461 | * @return static |
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| 462 | */ |
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| 463 | protected function removeFromRelations(int $key): self |
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| 464 | { |
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| 465 | $this->relations->forget($key); |
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| 466 | $this->mutated = true; |
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| 467 | |||
| 468 | return $this; |
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| 469 | } |
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| 470 | |||
| 471 | /** |
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| 472 | * @param array $associations |
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| 473 | * @return Collection |
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| 474 | */ |
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| 475 | protected function createRelations(array $associations = []): Collection |
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| 476 | { |
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| 477 | $collection = new Collection(); |
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| 478 | foreach ($associations as $association) { |
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| 479 | $this->insertCollection($collection, $association); |
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| 480 | } |
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| 481 | |||
| 482 | return $collection; |
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| 483 | } |
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| 484 | |||
| 485 | /** |
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| 486 | * Position the relationship based on the sort order |
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| 487 | * |
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| 488 | * @inheritDoc |
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| 489 | */ |
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| 490 | protected function insertCollection(Collection $collection, Association $association) |
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| 491 | { |
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| 492 | if ($this->field->ensureSortOrder() && $association->sortOrder > 0) { |
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| 493 | $collection->splice($association->sortOrder - 1, 0, [$association]); |
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| 494 | return; |
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| 495 | } |
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| 496 | |||
| 497 | $collection->push($association); |
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| 498 | } |
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| 499 | |||
| 500 | /** |
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| 501 | * @inheritDoc |
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| 502 | */ |
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| 503 | protected function updateCollection(Collection $collection, Association $association) |
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| 504 | { |
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| 505 | if (!$this->field->ensureSortOrder()) { |
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| 506 | return; |
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| 507 | } |
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| 508 | |||
| 509 | if (null !== ($key = $this->findKey($association))) { |
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| 510 | $collection->offsetUnset($key); |
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| 511 | } |
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| 512 | |||
| 513 | $this->insertCollection($collection, $association); |
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| 514 | } |
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| 515 | |||
| 516 | |||
| 517 | /************************************************************ |
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| 518 | * QUERY |
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| 519 | ************************************************************/ |
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| 520 | |||
| 521 | /** |
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| 522 | * @return AssociationQuery |
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| 523 | */ |
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| 524 | protected function associationQuery(): AssociationQuery |
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| 525 | { |
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| 526 | return Association::find() |
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| 527 | ->setSource($this->element->getId() ?: false) |
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| 528 | ->setField($this->field) |
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| 529 | ->orderBy([ |
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| 530 | 'sortOrder' => SORT_ASC |
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| 531 | ]) |
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| 532 | ->limit(null); |
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| 533 | } |
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| 534 | |||
| 535 | |||
| 536 | /******************************************* |
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| 537 | * CREATE |
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| 538 | *******************************************/ |
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| 539 | |||
| 540 | /** |
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| 541 | * Create a new relationship object |
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| 542 | * |
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| 543 | * @param $object |
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| 544 | * @return Association |
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| 545 | */ |
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| 546 | protected function create($object): Association |
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| 547 | { |
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| 548 | if ($object instanceof Association) { |
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| 549 | return $object; |
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| 550 | } |
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| 551 | |||
| 552 | $element = $this->resolveElement($object); |
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| 553 | |||
| 554 | return new Association([ |
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| 555 | 'fieldId' => $this->field->id, |
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| 556 | 'sourceId' => $this->element ? $this->element->getId() : null, |
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| 557 | 'targetId' => $element->getId() |
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| 558 | ]); |
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| 559 | } |
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| 560 | |||
| 561 | |||
| 562 | /******************************************* |
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| 563 | * UTILS |
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| 564 | *******************************************/ |
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| 565 | |||
| 566 | /** |
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| 567 | * @param UserAssociation|int|array|null $object |
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| 568 | * @return int|null |
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| 569 | */ |
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| 570 | protected function findKey($object = null) |
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| 571 | { |
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| 572 | if ($object instanceof Association) { |
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| 573 | return $this->findRelationshipKey($object->targetId); |
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| 574 | } |
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| 575 | |||
| 576 | if (null === ($element = $this->resolveElement($object))) { |
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| 577 | return null; |
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| 578 | } |
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| 579 | |||
| 580 | return $this->findRelationshipKey($element->getId()); |
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| 581 | } |
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| 582 | |||
| 583 | /** |
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| 584 | * @param $identifier |
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| 585 | * @return int|string|null |
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| 586 | */ |
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| 587 | private function findRelationshipKey($identifier) |
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| 588 | { |
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| 589 | if (null === $identifier) { |
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| 590 | return null; |
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| 591 | } |
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| 592 | |||
| 593 | /** @var Association $association */ |
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| 594 | foreach ($this->getRelationships()->all() as $key => $association) { |
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| 595 | if ($association->targetId == $identifier) { |
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| 596 | return $key; |
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| 597 | } |
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| 598 | } |
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| 599 | |||
| 600 | return null; |
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| 601 | } |
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| 602 | |||
| 603 | /** |
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| 604 | * @param ElementInterface|Association|int|array|null $element |
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| 605 | * @return ElementInterface|null |
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| 606 | */ |
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| 607 | protected function resolveElement($element = null) |
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| 629 | |||
| 630 | |||
| 631 | /******************************************* |
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| 632 | * MAGIC (pass calls onto query) |
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| 633 | *******************************************/ |
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| 634 | |||
| 635 | /** |
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| 636 | * @param string $name |
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| 637 | * @return mixed |
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| 638 | */ |
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| 639 | public function __get($name) |
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| 647 | |||
| 648 | /** |
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| 649 | * @param string $name |
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| 650 | * @param mixed $value |
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| 651 | */ |
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| 652 | public function __set($name, $value) |
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| 660 | |||
| 661 | /** |
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| 662 | * @param string $name |
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| 663 | * @param array $params |
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| 664 | * @return mixed |
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| 665 | */ |
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| 666 | public function __call($name, $params) |
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| 676 | } |
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| 677 |
It seems like the method you are trying to call exists only in some of the possible types.
Let’s take a look at an example:
Available Fixes
Add an additional type-check:
Only allow a single type to be passed if the variable comes from a parameter: