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<?php
namespace Staudenmeir\LaravelAdjacencyList\Query\Grammars;
use Illuminate\Database\Query\Builder;
use Illuminate\Database\Query\Grammars\MySqlGrammar as Base;
class MySqlGrammar extends Base implements ExpressionGrammar
{
/**
* Compile an initial path.
*
* @param string $column
* @param string $alias
* @return string
*/
public function compileInitialPath($column, $alias)
return 'cast('.$this->wrap($column).' as char(65535)) as '.$this->wrap($alias);
}
* Compile a recursive path.
public function compileRecursivePath($column, $alias)
return 'concat('.$this->wrap($alias).', ?, '.$this->wrap($column).')';
* Get the recursive path bindings.
* @param string $separator
* @return array
public function getRecursivePathBindings($separator)
return [$separator];
* Select a concatenated list of paths.
* @param \Illuminate\Database\Query\Builder $query
* @param string $expression
* @param string $pathSeparator
* @param string $listSeparator
* @return \Illuminate\Database\Query\Builder
public function selectPathList(Builder $query, $expression, $column, $pathSeparator, $listSeparator)
return $query->selectRaw(
'group_concat('.$this->wrap($column)." separator '$listSeparator')"
)->from($expression);
staudenmeir /
laravel-adjacency-list
