如何定义此数据库关系

Question

I have 3 tables:
:
id | name

:
id | address | venue_id | city_id

:
id | name | slug | display_name

a venue hasOne location, a location belongsTo a venue.
a location belongsTo a city,a city hasMany locations.

now, what's the relation between a venue and a city ?
how can I get queries from venue based on filtering city I mean execute "where" on city slug.
How can I get all venues from a city model?

Answer 1

Use a HasManyThrough relationship:

class City extends Eloquent
{
    public function venues()
    {
        return $this->hasManyThrough(App\Venue::class, App\Location::class);
    }
}