Since three days I'm working on following problem:

 protected function getTableQuery(): Builder
    {
        return User::
            where('age','>',21)
            ->AppendDistanceTo(
                $this->city->geo->long,
                $this->city->geo->lat,
                **lo**,
                **la**,
            );
        }

The Model User has user_id and a id for the city city_id.

In the model City there is longitude and latitude for each city_id. How can I get the longitude and latitude in the query above, für lo and la from the related Model?

Thank you very much for helping!

I want to show the distance from a selected city ( $this->city->geo->long,$this->city->geo->lat)

to the city, where the user lives.

CodePudding user response：

Given your User model has a city relationship, and the City model has a geo relationship, you could eager load the city relation like so:

User::where('age', '>', 21)
->with('city.geo')

Then, $user->city->geo->long

CodePudding user response：

Thank you, but I think, there is a misunderstanding, due my english.

class User extend Model
{


public function scopeAppendDistanceTo(Builder $query, $long_choice, $lat_choice,$long_destination, $lat_destination): Builder
{
    return $query->selectRaw("
   *,

   Round(ST_Distance_Sphere(
        point(?,?),
        point(?, ?)

        )/1000,0) as distance
", [
        $long_choice,
        $lat_choice,
        $long_destination,
        $lat_destination,
    ]);
}

public function city()
{
    return $this->hasOne(City::class, 'city_id', 'city_id_user');
}

class City extends Model
{
   'standard'
    
}

User::where('age', '>', 21)
 ->AppendDistanceTo(
                $this->city->geo->long, // user's choice in selection
                $this->city->geo->lat, // user's choice in selection

                here I need the long from CityModel related to city_id_user in UserModel,
                here I need the lat from CityModel related to city_id_user in UserModel,

So: I want to display the distance from a chosen city to the city in a users-data-set.

Thanks a lot.