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<?php |
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namespace N7olkachev\ComputedProperties; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Query\Builder as QueryBuilder; |
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trait ComputedProperties |
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{ |
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public static function bootComputedProperties() |
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{ |
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Builder::macro('withComputed', function ($properties) { |
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collect($properties)->each(function ($property) { |
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if (!$this->model->hasComputedProperty($property)) { |
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throw new \InvalidArgumentException("Computed property [$property] does not exist"); |
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} |
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$query = $this->model->callComputedProperty($property, true); |
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if (is_null($this->query->columns)) { |
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$this->query->select([$this->query->from.'.*']); |
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} |
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$this->selectSub($query, $property); |
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}); |
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return $this; |
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}); |
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} |
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public function __get($key) |
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{ |
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if (!array_key_exists($key, $this->attributes) && $this->hasComputedProperty($key)) { |
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$query = $this->callComputedProperty($key, false); |
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$result = (array) $query->first(); |
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$this->attributes[$key] = array_first($result); |
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} |
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return parent::__get($key); |
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} |
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public function hasComputedProperty($property) |
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{ |
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return method_exists($this, $this->computedPropertyMethodName($property)); |
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} |
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public function computedPropertyMethodName($property) |
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{ |
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return 'computed' . ucfirst(camel_case($property)); |
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} |
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public function callComputedProperty($property, $runningInQuery) |
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{ |
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$method = $this->computedPropertyMethodName($property); |
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$query = $this->$method(new ModelProxy($this, $runningInQuery)); |
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if ($query instanceof Builder) { |
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$query = $query->toBase(); |
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} |
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if (!$query instanceof QueryBuilder) { |
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throw new \UnexpectedValueException("Computed property must return EloquentBuilder or QueryBuilder instance"); |
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} |
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return $query; |
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} |
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} |
n7olkachev /
laravel-computed-properties
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