Laravel Recursive Relationships

Question

I\'m working on a project in Laravel. I have an Account model that can have a parent or can have children, so I have my model set up like so:

public         


        

Answer 1

For future reference:

public function parent()
{
    // recursively return all parents
    // the with() function call makes it recursive.
    // if you remove with() it only returns the direct parent
    return $this->belongsTo('App\Models\Category', 'parent_id')->with('parent');
}

public function child()
{
    // recursively return all children
    return $this->hasOne('App\Models\Category', 'parent_id')->with('child');
}

This is for a Category model that has id, title, parent_id. Here's the database migration code:

    Schema::create('categories', function (Blueprint $table) {
        $table->increments('id');
        $table->timestamps();
        $table->string('title');
        $table->integer('parent_id')->unsigned()->nullable();
        $table->foreign('parent_id')->references('id')->on('categories')->onUpdate('cascade')->onDelete('cascade');
    });