laravel wherebetween in relations not working

问题

I have two tables in mysql, 1. Vehicles and 2.Locations i am using eloquent relations to define relation of the vehicle table to locations.

here is how my vehicles modle looks.

namespace App;

use Illuminate\Database\Eloquent\Model;
class VehicleModel extends Model {
function locations(){
        return $this->hasMany("App\locations", "vehicle_id", "id");
    }
}

i am trying to run a query that can get me locations of specific vehicle between two given times.

here is what i am trying to do:

App\VehicleModel::find(3)->location->whereBetween('locations.time', $range); 

I was expecting to above query would give me locations between dates which it does when i run without the relation. but when when i do run in a relation i am getting an unexpeted error.

PHP error: Call to a member function whereHas() on null on line 1

Please help me see where i am going wrong.

Thanks in advance.

回答1:

Change it to:

App\VehicleModel::find(3)->locations()->whereBetween('time', $range)->get();

回答2:

you send query from other relation model location

your query look like this location->location

please check this code

App\VehicleModel::find(3)->locations()->whereBetween('time', $range);

回答3:

Using relationship method without parenthesis return a collection, use parenthesis to return the relationship where you can add other query methods like whereBetween:

App\VehicleModel::find(3)->location()->whereBetween('time', $range)->get(); 

来源：https://stackoverflow.com/questions/48156429/laravel-wherebetween-in-relations-not-working