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<?php |
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declare(strict_types=1); |
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namespace LaravelFreelancerNL\Aranguent\Schema; |
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use Illuminate\Database\Schema\Grammars\Grammar as IlluminateGrammar; |
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use Illuminate\Support\Fluent; |
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use LaravelFreelancerNL\FluentAQL\QueryBuilder; |
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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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* |
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* @param string $table |
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* @return Fluent |
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* @throws BindException |
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*/ |
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public function compileColumns($table, Fluent $command) |
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{ |
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$command->bindings = [ |
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'@collection' => $table, |
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]; |
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$command->aqb = sprintf( |
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'LET rawColumns = MERGE_RECURSIVE( |
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( |
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FOR doc IN @@collection |
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LET fields = ATTRIBUTES(doc, true, true) |
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FOR field IN fields |
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RETURN { |
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[field]: { |
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[TYPENAME(doc[field])]: true |
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} |
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} |
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) |
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) |
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FOR column IN ATTRIBUTES(rawColumns) |
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RETURN { |
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name: column, |
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types: ATTRIBUTES(rawColumns[column]) |
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}', |
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$table, |
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); |
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return $command; |
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} |
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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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* |
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* @param string $table |
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* @return Fluent |
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* @throws BindException |
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*/ |
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public function compileHasColumn($table, Fluent $command) |
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{ |
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$attributes = $command->getAttributes(); |
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$aqb = new QueryBuilder(); |
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$filter = []; |
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foreach ($attributes['columns'] as $column) { |
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$filter[] = [$aqb->rawExpression('HAS(doc, \'' . $column . '\')')]; |
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} |
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$command->aqb = |
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$aqb->let( |
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'columnFound', |
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$aqb->first( |
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(new QueryBuilder())->for('doc', $table) |
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->filter($filter) |
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->limit(1) |
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->return('true'), |
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), |
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)->return($aqb->rawExpression('columnFound == true')) |
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->get(); |
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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 $table |
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* @param Fluent $command |
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* @return Fluent |
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*/ |
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public function compileRenameAttribute($table, Fluent $command) |
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{ |
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$attributes = $command->getAttributes(); |
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$filter = [ |
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['doc.' . $attributes['from'], '!=', null], |
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['doc.' . $attributes['to'], '==', null], |
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]; |
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$aqb = (new QueryBuilder())->for('doc', $table) |
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->filter($filter) |
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->update( |
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'doc', |
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[ |
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$attributes['from'] => null, |
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$attributes['to'] => 'doc.' . $command->from, |
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], |
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$table, |
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) |
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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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* Compile AQL to drop one or more attributes. |
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* |
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* @param string $table |
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* @param Fluent $command |
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* @return Fluent |
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*/ |
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public function compileDropColumn($table, Fluent $command) |
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{ |
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$filter = []; |
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$attributes = $command->getAttributes(); |
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$data = []; |
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foreach ($attributes['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 = (new QueryBuilder())->for('doc', $table) |
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->filter($filter) |
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->update('doc', $data, $table) |
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->options(['keepNull' => false]) |
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->get(); |
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$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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public function wrapBindVar(string $attribute): string |
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{ |
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$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
