如何在用户模型中以任务为中心来限制仅未完成的任务？

Question

在 laravel 10 网站上我有 3 个相关表：

Schema::create('users', function (Blueprint $table) {
    $table->id();
    $table->string('name');
    ...
    $table->timestamp('created_at')->useCurrent();
});


Schema::create('tasks', function (Blueprint $table) {
    $table->id();
    $table->foreignId('creator_id')->references('id')->on('users')->onUpdate('RESTRICT')->onDelete('CASCADE');
    $table->boolean('completed')->default(false);
    ...
    $table->timestamp('created_at')->useCurrent();
    $table->timestamp('updated_at')->nullable();
});


Schema::create('task_user', function (Blueprint $table) {
    $table->id();
    $table->unsignedBigInteger('user_id')->unsigned()->index();
    $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');

    $table->foreignId('task_id')->references('id')->on('tasks')->onUpdate('RESTRICT')->onDelete('CASCADE');
    $table->timestamp('created_at')->useCurrent();
    $table->unique(['user_id', 'task_id']);
});

我在 app/Models/User.php 中定义了枢轴关系：

public function tasks(): belongsToMany {
        return $this->belongsToMany(Task::class);
}

但是在这种关系中我如何才能仅限于未完成的任务，其中

tasks.completed = false

？

"laravel/framework": "^10.48.7",

提前致谢！

Answer 1

我对 Laravel 很陌生，但在 Laravel 文档中，对于这样的情况，apperas 是 wherePivot() 方法：

public function tasks(): belongsToMany {
        return $this->belongsToMany(Task::class)->wherePivot('completed',false);
}

https://laravel.com/docs/10.x/eloquent-relationships#filtering-queries-via-intermediate-table-columns 据我了解，这可以解决问题。