eloquent filter result based on foreign table attribute

Question

I'm using laravel and eloquent.
Actually I have problems filtering results from a table based on conditions on another table's attributes.
I have 3 tables:

• venue

• city

  
  here are the relationships:
  a city has many locations and a location belongs to a city.
  a location belongs to a venue and a venue has one location.

I have a city_id attribute on locations table, which you may figured out from relationships.

The question is simple:
how can I get those venues which belong to a specific city?
the eloquent query I expect looks like this:
$venues=Venue::with('location')->where('location.city_id',$city->getKey());

Of course that's not gonna work, but seems like this is common task and there would be an eloquent command for it.
Thanks!

Answer 1

A couple of options:

$venues = Venue::whereIn('location_id', Location::whereCityId($city->id)->get->lists('id'))
    ->get();

Or possibly using whereHas:

$venues = Venue::whereHas('location', function($query) use ($city) {
    $query->whereCityId($city->id);
})->get();