从 Laravel 中的集合结果中获取相关数据

Question

I retrieved a collection of locations by id of a Firm. One firm can have many locations. Now I'm trying to retrieve staff from a location. One location can have many staff members.

• Model: Firm - hasMany relationship function called: firmLocations .
• Model: Location - belongsTo relationship function called Firm . Also had a hasMany function called Staff .
• Model: Staff - belongsTo relationship function called Location .

Staff model only relates with Location model.

Code is in a show function in a controller.

I thought now that I have related locations for a particular firm I can just use that collection to get staff members. However, I've hit a roadblock and help would be greatly appreciated. Thanks.

public function showFirm($id)
{
    // Get locations of a firm by id
    $firm_locations = Firm::find($id)->firmLocations;
}

Answer 1

You can retrieve Staff based on location along with firm.

public function showFirm($id) {

    // Get locations of a firm by id with staff member from location

    $firm_locations = Firm::where('id',$id)->with('firmLocations.staff')->first();

    // Above function retrieve Firm with Location and Location will have staff.
}

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I am assuming you've set up relationship correctly and you've working knowledge of relationship.