在laravel关系中设置foreingn表的位置

Question

I have a table has many relation to other tables but it seperated with entity value please look at this :

i have this schema

    public function up()
    {
        Schema::create('cards', function(Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->integer('user_id')->unsigned()->nullable();
            $table->integer('entity_id');
            $table->string('entity');
            $table->integer('qty')->nullable()->default('1');
        });
    }


    public function up()
    {
        Schema::create('tickets', function(Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->string('title');
            $table->string('summary');
            $table->integer('amount');
            $table->integer('stock')->default('0');
            $table->integer('discount')->default('0');
        });
    }

    public function up()
    {
        Schema::create('products', function(Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->integer('title');
            $table->integer('amount');
            $table->integer('discount');
            $table->text('description');
            $table->integer('stock')->default('0');
        });
    }

and this relation in models

class Card extends Model 
{

    protected $table = 'cards';
    public $timestamps = true;

    public function ticket()
    {
        return $this->belongsTo('App\Models\Ticket', 'entity_id');
    }

    public function product()
    {
        return $this->belongsTo('App\Models\Product', 'entity_id');
    }

}

i need to set where entity = 'ticket' before use belongsTo i mean is a table hase relation to many table base entity_id and i seperated it by entity column and base same vlue most have realation just.

Answer 1

You can do simply in your eloquent model file. do like this :

public function ticketWithCondition()
{
    return $this->belongsTo('App\Models\Ticket', 'entity_id')->where('entity' , 'ticket');
}

public function ticket()
{
    return $this->belongsTo('App\Models\Ticket', 'entity_id');
}

call like this :

// for show Card with EntityCondition
$comments = Card::find(123)->with('ticketWithCondition');

// for show comments without EntityCondition
$comments = Card::find(123)->with('ticket');