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<?php |
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namespace Dyrynda\Database\Support; |
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/** |
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* UUID generation trait. |
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* |
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* Include this trait in any Eloquent model where you wish to automatically set |
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* a UUID field. When saving, if the UUID field has not been set, generate a |
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* new UUID value, which will be set on the model and saved by Eloquent. |
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* |
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* @copyright 2017 Michael Dyrynda |
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* @author Michael Dyrynda <[email protected]> |
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* @license MIT |
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*/ |
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trait GeneratesUuid |
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{ |
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protected $uuidVersions = [ |
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'uuid1', |
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'uuid3', |
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'uuid4', |
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'uuid5', |
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]; |
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/** |
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* Boot the trait, adding a creating observer. |
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* |
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* When persisting a new model instance, we resolve the UUID field, then set |
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* a fresh UUID, taking into account if we need to cast to binary or not. |
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*/ |
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public static function bootGeneratesUuid() |
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{ |
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static::creating(function ($model) { |
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$uuid = $model->resolveUuid(); |
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if (isset($model->attributes['uuid']) && ! is_null($model->attributes['uuid'])) { |
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$uuid = $uuid->fromString(strtolower($model->attributes['uuid'])); |
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} |
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$model->attributes['uuid'] = $model->hasCast('uuid') ? $uuid->getBytes() : $uuid->toString(); |
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}); |
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} |
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/** |
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* Resolve a UUID instance for the configured version. |
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* |
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* @return \Ramsey\Uuid\Uuid |
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*/ |
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public function resolveUuid() |
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{ |
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return call_user_func("\Ramsey\Uuid\Uuid::{$this->resolveUuidVersion()}"); |
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} |
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/** |
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* Resolve the UUID version to use when setting the UUID value. Default to uuid4. |
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* |
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* @return string |
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*/ |
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public function resolveUuidVersion() |
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{ |
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if (property_exists($this, 'uuidVersion') && in_array($this->uuidVersion, $this->uuidVersions)) { |
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return $this->uuidVersion; |
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} |
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return 'uuid4'; |
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} |
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/** |
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* Scope queries to find by UUID. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param string $uuid |
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* |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeWhereUuid($query, $uuid) |
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{ |
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if ($this->hasCast('uuid')) { |
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return $query->where( |
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'uuid', |
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call_user_func("\Ramsey\Uuid\Uuid::{$this->resolveUuidVersion()}")->fromString($uuid)->getBytes() |
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); |
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} |
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return $query->where('uuid', $uuid); |
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} |
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/** |
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* Cast an attribute to a native PHP type. |
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* |
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* @param string $key |
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* @param mixed $value |
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* @return mixed |
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*/ |
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protected function castAttribute($key, $value) |
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{ |
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if ($key == 'uuid' && ! is_null($value)) { |
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return call_user_func("\Ramsey\Uuid\Uuid::{$this->resolveUuidVersion()}")->fromBytes($value)->toString(); |
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} |
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return parent::castAttribute($key, $value); |
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} |
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} |
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michaeldyrynda /
laravel-model-uuid
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.