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<?php |
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namespace Yajra\DataTables; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\Relations\BelongsTo; |
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use Illuminate\Database\Eloquent\Relations\BelongsToMany; |
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use Illuminate\Database\Eloquent\Relations\HasOneOrMany; |
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use Yajra\DataTables\Exceptions\Exception; |
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class EloquentDataTable extends QueryDataTable |
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{ |
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/** |
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* @var \Illuminate\Database\Eloquent\Builder |
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*/ |
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protected $query; |
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/** |
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* EloquentEngine constructor. |
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* |
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* @param mixed $model |
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*/ |
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public function __construct($model) |
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{ |
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$builder = $model instanceof Builder ? $model : $model->getQuery(); |
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parent::__construct($builder->getQuery()); |
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$this->query = $builder; |
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} |
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/** |
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* If column name could not be resolved then use primary key. |
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* |
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* @return string |
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*/ |
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protected function getPrimaryKeyName() |
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{ |
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return $this->query->getModel()->getKeyName(); |
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} |
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/** |
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* Compile query builder where clause depending on configurations. |
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* |
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* @param mixed $query |
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* @param string $columnName |
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* @param string $keyword |
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* @param string $boolean |
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*/ |
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protected function compileQuerySearch($query, $columnName, $keyword, $boolean = 'or') |
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{ |
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$parts = explode('.', $columnName); |
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$column = array_pop($parts); |
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$relation = implode('.', $parts); |
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if (!$relation || $relation === $this->query->getModel()->getTable()) { |
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return parent::compileQuerySearch($query, $columnName, $keyword, $boolean); |
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} |
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$query->{$boolean . 'WhereHas'}($relation, function (Builder $query) use ($column, $keyword) { |
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parent::compileQuerySearch($query, $column, $keyword, ''); |
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}); |
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} |
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/** |
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* Resolve the proper column name be used. |
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* |
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* @param string $column |
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* @return string |
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*/ |
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protected function resolveRelationColumn($column) |
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{ |
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$parts = explode('.', $column); |
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$columnName = array_pop($parts); |
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$relation = implode('.', $parts); |
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if (!$relation || $relation === $this->query->getModel()->getTable()) { |
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return $columnName; |
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} |
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return $this->joinEagerLoadedColumn($relation, $columnName); |
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} |
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/** |
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* Join eager loaded relation and get the related column name. |
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* |
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* @param string $relation |
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* @param string $relationColumn |
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* @return string |
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* @throws \Yajra\DataTables\Exceptions\Exception |
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*/ |
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protected function joinEagerLoadedColumn($relation, $relationColumn) |
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{ |
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$table = ''; |
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$lastQuery = $this->query; |
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foreach (explode('.', $relation) as $eachRelation) { |
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$model = $lastQuery->getRelation($eachRelation); |
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switch (true) { |
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case $model instanceof BelongsToMany: |
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$pivot = $model->getTable(); |
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$pivotPK = $model->getExistenceCompareKey(); |
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$pivotFK = $model->getQualifiedParentKeyName(); |
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$this->performJoin($pivot, $pivotPK, $pivotFK); |
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$related = $model->getRelated(); |
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$table = $related->getTable(); |
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$tablePK = $related->getForeignKey(); |
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$foreign = $pivot . '.' . $tablePK; |
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$other = $related->getQualifiedKeyName(); |
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$lastQuery->addSelect($table . '.' . $relationColumn); |
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$this->performJoin($table, $foreign, $other); |
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break; |
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case $model instanceof HasOneOrMany: |
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$table = $model->getRelated()->getTable(); |
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$foreign = $model->getQualifiedForeignKeyName(); |
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$other = $model->getQualifiedParentKeyName(); |
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break; |
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case $model instanceof BelongsTo: |
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$table = $model->getRelated()->getTable(); |
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$foreign = $model->getQualifiedForeignKey(); |
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$other = $model->getQualifiedOwnerKeyName(); |
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break; |
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default: |
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throw new Exception('Relation ' . get_class($model) . ' is not yet supported.'); |
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} |
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$this->performJoin($table, $foreign, $other); |
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$lastQuery = $model->getQuery(); |
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} |
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return $table . '.' . $relationColumn; |
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} |
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/** |
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* Perform join query. |
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* |
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* @param string $table |
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* @param string $foreign |
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* @param string $other |
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* @param string $type |
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*/ |
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protected function performJoin($table, $foreign, $other, $type = 'left') |
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{ |
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$joins = []; |
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foreach ((array) $this->getBaseQueryBuilder()->joins as $key => $join) { |
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$joins[] = $join->table; |
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} |
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if (!in_array($table, $joins)) { |
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$this->getBaseQueryBuilder()->join($table, $foreign, '=', $other, $type); |
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} |
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} |
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} |
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yajra /
laravel-datatables
