I have models below:
UserProgram user_id, program_id. User Profile, user_id, gender Program
and I have a function gender in my UserProgram model
public function gender()
{
  $gender = "N/A";
  $user = User::find($this->user_id);
  if (!empty($user)) {
    $profile = Profile::where('user_id',$user->id)->first();
    if (!empty($profile)) {
        $gender = $profile->gender;
    }
  }
  return $gender;
}
Now I want to run a query that counts how many male or Female I have for a particular program. I want to be able to do something like this.
$male_count = UserProgram::with(‘gender)->where([ ['program_id',104],[‘gender’,’Male’] ])->count();
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Answer
The above won’t work as Laravel will be expecting gender() to return a Relation not a Model.
Assuming that you have a user relationship in your UserProgram model and you have a profile relationship in your user model, you can use whereHas:
$count = UserProgram::where('program_id', 104)
    ->whereHas('user.profile', function ($query) {
        $query->where('gender', 'Male');
    })
    ->count();