CakePHP3 - 自反关系和查找器

Question

我已经开始使用 CakePHP3 开发一个新网站，但我遇到了关系。

给定实体 Movies 和 Join Table MoviesMovies。每部电影都与其他电影相关，但在关系中没有方向。

使用 CakePHP2，我在关系定义中使用了属性 finderQuery：

public $hasAndBelongsToMany = array(
    'Movies' => array(
        'finderQuery' => 'SELECT movies.* FROM movies JOIN movies_movies ON (movies_movies.movie_1_id = movies.id AND movies_movies.movie_2_id = {$__cakeID__$}) OR (movies_movies.movie_2_id = movies.id AND movies_movies.movie_1_id = {$__cakeID__$})'
    )
);

我尝试使用 finder 属性在 CakePHP3 中重现此行为，但它不起作用，并且 {$cakeID$}：

$this->belongsToMany('Movies', [
    'finder' => 'relations'
]);

public function findRelations(Query $query, array $options){
    $query->join([
        'mm' => [
            'table' => 'movies_movies',
            'type' => 'INNER',
            'conditions' => [
                'OR' => [
                    'AND' => ['mm.movie_1_id = movies.id', 'mm.movie_2_id = {$__cakeID__$}'],
                    'AND' => ['mm.movie_2_id = movies.id', 'mm.movie_1_id = {$__cakeID__$}']
                ],
            ]
        ]
    ]);
    return $query;
}

我做对了吗？以及如何编写这个自定义查找器？

PS : CakePHP2 的问题在这里Reflexive many-to-many relationship in CakePHP

Answer 1

这有帮助吗？

$this->belongsToMany('RelatedMovies', [
    'className' => 'Movies',
    'through' => 'movies_movies',
    'conditions' => [
         'OR' => [
                'AND' =>['MoviesMovies.movie_1_id = RelatedMovies.id', 'MoviesMovies.movie_2_id = Movies.id'],
                'AND' => ['MoviesMovies.movie_2_id = RelatedMovies.id', 'MoviesMovies.movie_1_id = Movies.id']
            ],
    ],
]);