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<?php |
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namespace LaravelFreelancerNL\Aranguent\Schema; |
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use Illuminate\Support\Fluent; |
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use Illuminate\Database\Schema\Grammars\Grammar as IlluminateGrammar; |
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use LaravelFreelancerNL\FluentAQL\Facades\AQB; |
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class Grammar extends IlluminateGrammar |
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{ |
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/** |
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* ArangoDB handles transactions itself. However most schema actions |
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* are not done through queries but rather through commands. |
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* So we just run schema actions sequentially. |
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* |
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* @var bool |
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*/ |
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protected $transactions = false; |
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/** |
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* Compile AQL to check if an attribute is in use within a document in the collection. |
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* If multiple attributes are set then all must be set in one document. |
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* @param string $collection |
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* @param Fluent $command |
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* @return Fluent |
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*/ |
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public function compileHasAttribute($collection, Fluent $command) |
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{ |
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if (is_string($command->attribute)) { |
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$command->attribute = [$command->attribute]; |
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} |
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$filter = []; |
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foreach ($command->attribute as $attribute) { |
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$filter[] = ['doc.'.$attribute, '!=', 'null']; |
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} |
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$aqb = AQB::for('doc', $collection) |
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->filter($filter) |
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->limit(1) |
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->return('true') |
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->get(); |
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$command->aqb = $aqb; |
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return $command; |
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} |
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/** |
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* Compile AQL to rename an attribute, if the new name isn't already in use. |
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* |
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* @param string $collection |
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* @param Fluent $command |
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* @return Fluent |
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*/ |
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public function compileRenameAttribute($collection, Fluent $command) |
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{ |
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$bindings['@collection'] = $collection; |
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$bindings['from'] = $this->wrapBindVar($command->to); |
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$bindings['to'] = $this->wrapBindVar($command->from); |
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$filter = [ |
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['doc.'.$command->from, '!=', 'null'], |
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['doc.'.$command->to], |
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]; |
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$aqb = AQB::for('doc', $collection) |
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->filter($filter) |
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->update( |
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'doc', |
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[ |
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$command->from => 'null', |
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$command->to => 'doc.'.$command->from, |
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], |
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$collection) |
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->options( ['keepNull' => true]) |
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->get(); |
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$command->aqb = $aqb; |
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return $command; |
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} |
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/** |
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* Compile AQL to drop one or more attributes. |
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* |
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* @param string $collection |
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* @param Fluent $command |
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* @return Fluent |
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*/ |
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public function compileDropAttribute($collection, Fluent $command) |
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{ |
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$filter = []; |
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if (is_string($command->attributes)) { |
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$command->attributes = [$command->attributes]; |
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} |
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$data = []; |
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foreach ($command->attributes as $attribute) { |
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$filter[] = ['doc.'.$attribute, '!=', 'null', 'OR']; |
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$data[$attribute] = 'null'; |
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} |
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$aqb = AQB::for('doc', $collection) |
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->filter($filter ) |
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->update('doc', $data, $collection) |
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->options(['keepNull' => false]) |
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->get(); |
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$command->aqb = $aqb; |
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return $command; |
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} |
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/** |
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* Prepare a bindVar for inclusion in an AQL query. |
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* |
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* @param $attribute |
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* @return string |
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*/ |
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public function wrapBindVar($attribute) |
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{ |
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$attribute = trim($attribute); |
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if (strpos($attribute, '@') === 0) { |
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$attribute = "`$attribute`"; |
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} |
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return $attribute; |
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} |
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} |
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LaravelFreelancerNL /
laravel-arangodb
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