Laravel 5.1 Eloquent添加条件

Question

Car.php

class Car extends Model {
    protected $table = 'master_cars';
}

Person.php

class Person extends Model {
    protected $table = 'master_persons';

    public function car() {
        return $this->belongsTo('App\Models\Car', 'car_id', 'id');
    }
}

Controller.php

$cars = Car::orderBy('id', 'desc')->where('name', '=', $request->name);

if (!empty($request->person)) {
    $cars->join('master_persons', 'master_persons.car_id', '=', 'master_cars.id')
     ->where('master_persons.name', '=', $request->person);
}
$cars->paginate(10);

return view('main.index')
            ->with('cars', $cars);

index.blade.php

@foreach ($cars as $car)
    {!! car->name !!}
@endforeach
{!! $cars->render() !!}

In this way, when you use the Eloquent, the following error occurs.

"Call to undefined method Illuminate\Database\Query\Builder::render() "

Resolution is or not people can be seen?

Answer 1

$cars is s collection and not an individual Car object.

To call an instance method on an object, it has to be called on an instance of that class

So you should either call the render() method from within that foreach loop, or you need to say something like $cars->first()->render(), or anything else that returns s single Car instance