Jquery DataTables-将表与查找表连接

我有一个查找（或链接）表

learning\u event\u presentation\u lookup

：

+---------------------------------------+-------------------+-----------------+
| learning_event_presentation_lookup_pk | learning_event_fk | presentation_fk |
+---------------------------------------+-------------------+-----------------+

这是为了方便连接表

学习\u事件

和

演示

在下面的代码中，我需要在联接中使用该表

目前，我得到了一个错误：

DataTables警告：table id=learning_event_table-发生SQL错误：SQLSTATE[42000]：语法错误或访问冲突：1066非唯一表/别名：“learning_event”

及

---

好的，我查看了关于使用链接表的文档：

因此，现在我有以下内容，它不会产生任何错误，并且工作正常。但是，以dataTables格式进行连接并不直观

Editor::inst( $db2, 'learning_event', 'learning_event_pk' )   
    ->field(
     Field::inst( 'learning_event.learning_event_name' ),
     Field::inst( 'learning_event.learning_event_outcome' ),
    Field::inst( 'presentation.presentation_name' ),
     Field::inst( 'learning_event.rdb_group_fk' )
            ->options( Options::inst()
                ->table( 'rdb_group' )
                ->value( 'rdb_group_pk' )
                ->label( 'rdb_group_name' )
            )
            ->validator( 'Validate::notEmpty' ),
        Field::inst( 'rdb_group.rdb_group_name' ),
        Field::inst( 'learning_event.rotation_discipline_block_fk' )
            ->options( Options::inst()
                ->table( 'rotation_discipline_block' )
                ->value( 'rotation_discipline_block_pk' )
                ->label( 'rotation_discipline_block_name' )
            )
            ->validator( 'Validate::dbValues' ),
        Field::inst( 'rotation_discipline_block.rotation_discipline_block_name' )

    )
    ->leftJoin( 'rdb_group', 'rdb_group.rdb_group_pk', '=', 'learning_event.rdb_group_fk' )
    ->leftJoin( 'rotation_discipline_block', 'rotation_discipline_block.rotation_discipline_block_pk', '=', 'learning_event.rotation_discipline_block_fk' )
    ->leftJoin( 'learning_event_presentation_lookup', 'learning_event.learning_event_pk', '=', 'learning_event_presentation_lookup.learning_event_fk' )
    ->leftJoin( 'presentation', 'learning_event_presentation_lookup.presentation_fk', '=', 'presentation.presentation_pk' )
    ->process($_POST)
    ->json();

---

如果您将其作为sql，您可以找到它。上面说，

learning\u event

以相同的名称加入了两次。

Editor::inst( $db2, 'learning_event', 'learning_event_pk' )   
    ->field(
     Field::inst( 'learning_event.learning_event_name' ),
     Field::inst( 'learning_event.learning_event_outcome' ),
    Field::inst( 'presentation.presentation_name' ),
     Field::inst( 'learning_event.rdb_group_fk' )
            ->options( Options::inst()
                ->table( 'rdb_group' )
                ->value( 'rdb_group_pk' )
                ->label( 'rdb_group_name' )
            )
            ->validator( 'Validate::notEmpty' ),
        Field::inst( 'rdb_group.rdb_group_name' ),
        Field::inst( 'learning_event.rotation_discipline_block_fk' )
            ->options( Options::inst()
                ->table( 'rotation_discipline_block' )
                ->value( 'rotation_discipline_block_pk' )
                ->label( 'rotation_discipline_block_name' )
            )
            ->validator( 'Validate::dbValues' ),
        Field::inst( 'rotation_discipline_block.rotation_discipline_block_name' )

    )
    ->leftJoin( 'rdb_group', 'rdb_group.rdb_group_pk', '=', 'learning_event.rdb_group_fk' )
    ->leftJoin( 'rotation_discipline_block', 'rotation_discipline_block.rotation_discipline_block_pk', '=', 'learning_event.rotation_discipline_block_fk' )
    ->leftJoin( 'presentation', 'presentation.presentation_pk', '=', 'learning_event_presentation_lookup.presentation_fk' )
    ->leftJoin( 'learning_event', 'learning_event.learning_event_pk', '=', 'learning_event_presentation_lookup.learning_event_fk' )
    ->process($_POST)
    ->json();

Editor::inst( $db2, 'learning_event', 'learning_event_pk' )   
    ->field(
     Field::inst( 'learning_event.learning_event_name' ),
     Field::inst( 'learning_event.learning_event_outcome' ),
    Field::inst( 'presentation.presentation_name' ),
     Field::inst( 'learning_event.rdb_group_fk' )
            ->options( Options::inst()
                ->table( 'rdb_group' )
                ->value( 'rdb_group_pk' )
                ->label( 'rdb_group_name' )
            )
            ->validator( 'Validate::notEmpty' ),
        Field::inst( 'rdb_group.rdb_group_name' ),
        Field::inst( 'learning_event.rotation_discipline_block_fk' )
            ->options( Options::inst()
                ->table( 'rotation_discipline_block' )
                ->value( 'rotation_discipline_block_pk' )
                ->label( 'rotation_discipline_block_name' )
            )
            ->validator( 'Validate::dbValues' ),
        Field::inst( 'rotation_discipline_block.rotation_discipline_block_name' )

    )
    ->leftJoin( 'rdb_group', 'rdb_group.rdb_group_pk', '=', 'learning_event.rdb_group_fk' )
    ->leftJoin( 'rotation_discipline_block', 'rotation_discipline_block.rotation_discipline_block_pk', '=', 'learning_event.rotation_discipline_block_fk' )
    ->leftJoin( 'learning_event_presentation_lookup', 'learning_event.learning_event_pk', '=', 'learning_event_presentation_lookup.learning_event_fk' )
    ->leftJoin( 'presentation', 'learning_event_presentation_lookup.presentation_fk', '=', 'presentation.presentation_pk' )
    ->process($_POST)
    ->json();