Call to a member function whereHas() on a non-object in laravel

问题

In my controller I have wrote this following code

$usersCount       = User::where('activated', '=', 1)->where('group_id', '=', 1)->where('availability_date', '<=', $opportunity_date)->count();
                $locations_array_result = explode(",",$locations_array_result);
                foreach ($locations_array_result as $param)
                {
                    $usersCount = $usersCount->whereHas('location', function($q) use($param){
                        $q->where('location_id', '=', $param );
                    });
                }

This code giving following error Call to a member function whereHas() on a non-object Can anyone help me to find out what i have done wrong!!!

回答1:

$usersCount is already a number from the 1st line of your sample.

You want instead to replace $usersCount->whereHas with User::whereHas in your foreach loop.

回答2:

Taking a very wild guess here, I would think you need to get all users with these requirements

 ->where('group_id', '=', 1)->where('availability_date', '<=', $opportunity_date)

plus having a location_id value which exists on an array named $locations_array_result

If this is the case, this is all you need:

User::where('activated', '=', 1)->where('group_id', '=', 1)->where('availability_date', '<=', $opportunity_date)->whereIn('location_id', $locations_array_result)->get();

EDIT Following your comment below, I assume user has many to many relation with locations (defined in your model), so eager loading and then using a condition with a callback should do the job:

 $users = User::where('activated', '=', 1)
  ->where('group_id', '=', 1)
  ->where('availability_date', '<=', $opportunity_date)
  ->with(array('location' => function($query) use ($locations_array_result)
  {
    $query->whereIn('location_id', $locations_array_result); 
   }))->get();

来源：https://stackoverflow.com/questions/26994459/call-to-a-member-function-wherehas-on-a-non-object-in-laravel