How to see expert only in own city in laravel 5.4 - laravel-5.4

Question

My project have two role
admin
expert
admin must see all data of all city.
expert must see all data of own city after registered.
public function index()
{
$schools = SchoolsList::latest()->paginate(25);
$city_id = SchoolsList::where('city_id')->first();
$expert = Role::where('id', '=', 2);
if ($expert){
return view('Admin.inspection-failed.all', compact('schools')->where(($city_id)));
}
else{
return view('Admin.inspection-failed.all', compact('schools'));
}
}
Table of school
Schema::create('schools', function (Blueprint $table) {
$table->increments('id');
$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users');
$table->integer('city_id')->unsigned();
$table->foreign('city_id')->references('id')->on('cities');
$table->string('school_name');
$table->string('status');
$table->string('gender');
$table->string('notes');
$table->string('member_name');
$table->string('type');
$table->string('file_number');
$table->string('phone');
$table->string('address');
});
I want to when a expert login. Expert display data only own expert city.
I get this error.
Call to a member function where() on array

Answer 1

Error becomes in this codecompact('schools')->where(($city_id)); because compact('schools') it is equivalent ['schools' => $schools]. See documentation http://php.net/manual/en/function.compact.php. And in your case your code is equivalent ['schools' => $schools]->where(($city_id)).
For fix it you must be use
Short Answer
$schools = $schools->where('city_id' => $city_id->id);
return view('Admin.inspection-failed.all', compact('schools'));
Long Answer
$city = City::first(); // you must be fix it yourself
$expert = Role::where('id', '=', 2); // you must be change it
if ($expert) {
$schools = SchoolsList::latest()->paginate(25);
} else {
$schools = SchoolsList::where('city_id', $city->id)->latest()->paginate(25);
}
return view('Admin.inspection-failed.all', compact('schools'));