where('user_contition', '=', 1); i think you need '1' (not sure just a guess)

did try this - but the error remains the same...

Maybe the whereHas() method helps. Not exactly a join, but it will do what you want.

$posts = Post::whereHas('comments', function($q)
{
    $q->where('content', 'like', 'foo%');

})->get();

There is no where clause on a join row. Either use it on your parent query or use another on.

DB::table('users')
	->join('contacts', function($join) {
		$join->on('users.id', '=', 'contacts.user_id');
	})
	->where('contacts.user_condition', 1)
	->get();

DB::table('users')
	->join('contacts', function($join) {
		$join->on('users.id', '=', 'contacts.user_id');
		$join->on('contacts.user_condition', '=', DB::raw(1));
	})
	->get();