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 HasPermissions 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 HasPermissions, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 14 | trait HasPermissions |
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| 15 | { |
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| 16 | private $permissionClass; |
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| 17 | |||
| 18 | public static function bootHasPermissions() |
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| 28 | |||
| 29 | public function getPermissionClass() |
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| 37 | |||
| 38 | /** |
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| 39 | * A model may have multiple direct permissions. |
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| 40 | */ |
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| 41 | public function permissions(): MorphToMany |
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| 51 | |||
| 52 | /** |
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| 53 | * Scope the model query to certain permissions only. |
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| 54 | * |
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| 55 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 56 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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| 57 | * |
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| 58 | * @return \Illuminate\Database\Eloquent\Builder |
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| 59 | */ |
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| 60 | public function scopePermission(Builder $query, $permissions): Builder |
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| 87 | |||
| 88 | /** |
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| 89 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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| 90 | * |
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| 91 | * @return array |
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| 92 | */ |
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| 93 | protected function convertToPermissionModels($permissions): array |
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| 109 | |||
| 110 | /** |
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| 111 | * Determine if the model may perform the given permission. |
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| 112 | * |
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| 113 | * @param string|int|\Spatie\Permission\Contracts\Permission $permission |
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| 114 | * @param string|null $guardName |
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| 115 | * |
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| 116 | * @return bool |
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| 117 | * @throws \Exception |
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| 118 | */ |
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| 119 | public function hasPermissionTo($permission, $guardName = null): bool |
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| 140 | |||
| 141 | /** |
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| 142 | * Check the uncached permissions for the model. |
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| 143 | * |
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| 144 | * @param string|int|Permission $permission |
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| 145 | * @param string|null $guardName |
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| 146 | * |
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| 147 | * @return bool |
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| 148 | */ |
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| 149 | public function hasUncachedPermissionTo($permission, $guardName = null): bool |
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| 173 | |||
| 174 | /** |
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| 175 | * An alias to hasPermissionTo(), but avoids throwing an exception. |
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| 176 | * |
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| 177 | * @param string|int|\Spatie\Permission\Contracts\Permission $permission |
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| 178 | * @param string|null $guardName |
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| 179 | * |
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| 180 | * @return bool |
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| 181 | * |
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| 182 | * @throws \Exception |
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| 183 | */ |
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| 184 | public function checkPermissionTo($permission, $guardName = null): bool |
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| 192 | |||
| 193 | /** |
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| 194 | * Construct the key for the cache entry. |
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| 195 | * |
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| 196 | * @param null|string|int|\Spatie\Permission\Contracts\Permission $permission |
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| 197 | * |
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| 198 | * @return string |
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| 199 | */ |
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| 200 | protected function getCacheIdentifier($permission = null) |
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| 201 | { |
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| 202 | $key = PermissionRegistrar::$cacheKey.'.'.$this->getClassCacheString(); |
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| 203 | |||
| 204 | if ($permission !== null) { |
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| 205 | $key .= $this->getPermissionCacheString($permission); |
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| 206 | } |
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| 207 | |||
| 208 | return $key; |
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| 209 | } |
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| 210 | |||
| 211 | /** |
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| 212 | * Construct the tags for the cache entry. |
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| 213 | * |
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| 214 | * @param null|string|int|\Spatie\Permission\Contracts\Permission $permission |
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| 215 | * |
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| 216 | * @return array |
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| 217 | */ |
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| 218 | protected function getCacheTags($permission = null) |
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| 231 | |||
| 232 | /** |
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| 233 | * Get the key to cache the model by. |
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| 234 | * |
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| 235 | * @return string |
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| 236 | */ |
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| 237 | private function getClassCacheString() |
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| 241 | |||
| 242 | /** |
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| 243 | * Get the key to cache the permission by. |
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| 244 | * |
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| 245 | * @param string|int|\Spatie\Permission\Contracts\Permission $permission |
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| 246 | * |
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| 247 | * @return mixed |
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| 248 | */ |
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| 249 | protected function getPermissionCacheString($permission) |
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| 257 | |||
| 258 | /** |
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| 259 | * Determine if the model has any of the given permissions. |
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| 260 | * |
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| 261 | * @param array ...$permissions |
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| 262 | * |
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| 263 | * @return bool |
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| 264 | * @throws \Exception |
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| 265 | */ |
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| 266 | View Code Duplication | public function hasAnyPermission(...$permissions): bool |
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| 280 | |||
| 281 | /** |
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| 282 | * Determine if the model has all of the given permissions. |
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| 283 | * |
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| 284 | * @param array ...$permissions |
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| 285 | * |
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| 286 | * @return bool |
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| 287 | * @throws \Exception |
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| 288 | */ |
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| 289 | View Code Duplication | public function hasAllPermissions(...$permissions): bool |
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| 303 | |||
| 304 | /** |
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| 305 | * Determine if the model has, via roles, the given permission. |
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| 306 | * |
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| 307 | * @param \Spatie\Permission\Contracts\Permission $permission |
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| 308 | * |
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| 309 | * @return bool |
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| 310 | */ |
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| 311 | protected function hasPermissionViaRole(Permission $permission): bool |
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| 315 | |||
| 316 | /** |
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| 317 | * Determine if the model has the given permission. |
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| 318 | * |
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| 319 | * @param string|int|\Spatie\Permission\Contracts\Permission $permission |
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| 320 | * |
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| 321 | * @return bool |
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| 322 | */ |
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| 323 | public function hasDirectPermission($permission): bool |
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| 347 | |||
| 348 | /** |
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| 349 | * Return all the permissions the model has via roles. |
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| 350 | */ |
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| 351 | public function getPermissionsViaRoles(): Collection |
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| 358 | |||
| 359 | /** |
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| 360 | * Return all the permissions the model has, both directly and via roles. |
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| 361 | * |
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| 362 | * @throws \Exception |
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| 363 | */ |
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| 364 | public function getAllPermissions(): Collection |
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| 389 | |||
| 390 | /** |
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| 391 | * Grant the given permission(s) to a role. |
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| 392 | * |
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| 393 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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| 394 | * |
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| 395 | * @return $this |
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| 396 | */ |
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| 397 | View Code Duplication | public function givePermissionTo(...$permissions) |
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| 432 | |||
| 433 | /** |
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| 434 | * Remove all current permissions and set the given ones. |
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| 435 | * |
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| 436 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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| 437 | * |
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| 438 | * @return $this |
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| 439 | */ |
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| 440 | public function syncPermissions(...$permissions) |
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| 446 | |||
| 447 | /** |
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| 448 | * Revoke the given permission. |
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| 449 | * |
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| 450 | * @param \Spatie\Permission\Contracts\Permission|\Spatie\Permission\Contracts\Permission[]|string|string[] $permission |
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| 451 | * |
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| 452 | * @return $this |
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| 453 | */ |
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| 454 | public function revokePermissionTo($permission) |
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| 464 | |||
| 465 | /** |
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| 466 | * @param string|array|\Spatie\Permission\Contracts\Permission|\Illuminate\Support\Collection $permissions |
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| 467 | * |
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| 468 | * @return \Spatie\Permission\Contracts\Permission|\Spatie\Permission\Contracts\Permission[]|\Illuminate\Support\Collection |
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| 469 | */ |
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| 470 | protected function getStoredPermission($permissions) |
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| 491 | |||
| 492 | /** |
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| 493 | * @param \Spatie\Permission\Contracts\Permission|\Spatie\Permission\Contracts\Role $roleOrPermission |
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| 494 | * |
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| 495 | * @throws \Spatie\Permission\Exceptions\GuardDoesNotMatch |
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| 496 | */ |
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| 497 | protected function ensureModelSharesGuard($roleOrPermission) |
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| 503 | |||
| 504 | protected function getGuardNames(): Collection |
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| 508 | |||
| 509 | protected function getDefaultGuardName(): string |
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| 513 | |||
| 514 | /** |
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| 515 | * Forget the cached permissions. |
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| 516 | */ |
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| 517 | public function forgetCachedPermissions() |
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| 521 | } |
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| 522 |
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
Idableprovides a methodequalsIdthat 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.