从数据库中选择正确语言的关系

Question

我的代码基于此代码Stackoverflow。

我有 3 个导航表（这是迁移）：

    Schema::create('navigation_positions', function (Blueprint $table) {
            $table->increments('id');
            $table->string('slug')->unique();
    });

    Schema::create('navigation', function (Blueprint $table) {
        $table->increments('id');
        $table->string('slug')->unique();
        $table->string('icon')->nullable();
        $table->string('url')->nullable();
        $table->integer('sort')->nullable()->default(NULL);
        $table->integer('parent_id')->unsigned()->nullable();
        $table->integer('position_id')->unsigned();
        $table->timestamps();

        $table->foreign('position_id')->references('id')->on('navigation_positions')
            ->onDelete('restrict');

    });

    Schema::create('navigation_translate', function (Blueprint $table) {
        $table->increments('id');
        $table->string('title');
        $table->integer('navigation_id')->unsigned();
        $table->integer('language_id')->unsigned();
        $table->timestamps();

        $table->foreign('navigation_id')->references('id')->on('navigation')
            ->onDelete('cascade');

        $table->foreign('language_id')->references('id')->on('languages')
            ->onDelete('restrict');
    });

我会将记录插入navigation，因为我的网站是多语言的（language_id 存储在language 会话中）我会将翻译的语言存储在navigation_translate。

我想根据我的language_id和navigation_positions.slug从navigation_translate中选择正确的记录。

例如这是我的记录：

navigation_positions：

["id" => 1, "slug" => "admin-sidebar"]

navigation_translate：

["id" => 1, "title" => "User Management", "navigation_id" => 1, "language_id" => 1]

我想用language_id = 1选择admin-sidebar位置的所有父母和孩子

Answer 1

如果我理解了这个问题，我认为这可能是一个正确的答案。 with() 方法允许您预先加载关系：

NavigationPosition::where('slug','some-slug')
    ->with(['navigation' => function ($query) {
        $query->with(['navigationTranslate' => function ($query) {
            $query->where('language_id',1);
        }]);
    }])->get();

参考：Laravel Documentation