mysql - Laravel 5.1 Updated Model Relationships when Eagerly Loaded Don't Persist to Database -

i'm updating rental belongsto location, , can fill , persist rental data, when fill location relationship data retrieved through eager loading if try save(), update(), or push(); isn't persisted database. according docs push() should work apparently persists relationships.

update action

public function update($id, rentalupdaterequest $request) {     // eager load rental relationships     $rental = rental::with('location')->find($id);      // retrieve rental data request, , fill     $requestdata = $request->only('stall', 'level', 'description');     $rental->fill($requestdata);      // retrieve rental location data request, , fill     $requestdata = $request->only(         'location.street_address',         'location.city',         'location.province',         'location.country',         'location.postal_code'     );     $rental->location->fill($requestdata);      // persist rental database, relationships     $rental->update();      // return rental data capture angularjs interceptor     return response()->json([         'rental' => $rental,         'action' => 'rental_updated',         'message' => trans('rental.updated')     ]); } 

payload , eager loaded data formatted same way

original rental loaded in client

rental:      description: "this rental."     id: 1     level: "7"     location:          city: "victoria"         country: "canada"         id: 11         postal_code: "v8t 2l5"         province: "british columbia"         street_address: "180 blanshard dr."     region_id: 1     rental_location_id: 11     stall: "7"     user_id: 1 

if payload is:

rental:      description: "this rental."     id: 1     level: "9" <-- changed     location:          city: "asdf" <-- changed         country: "asdf" <-- changed         id: 11         postal_code: "v8t 2l5"         province: "asdf" <-- changed         street_address: "180 blanshard dr."     region_id: 1     rental_location_id: 11     stall: "7"     user_id: 1 

response after save(), update(), or push()

rental:      description: "this rental."     id: 1     level: "9" <-- persisted     location:          city: "victoria" <-- not persisted         country: "canada" <-- not persisted         id: 11         postal_code: "v8t 2l5"         province: "british columbia" <-- not persisted         street_address: "180 blanshard dr."     region_id: 1     rental_location_id: 11     stall: "7"     user_id: 1 

appears in laravel 5.1 push() being dropped api, no longer in 5.1 docs, save() , update() don't work either, suggestions?

i've run several times now, try set attributes of eagerly loaded relationship, top level key:value pairs persisted, , child relationship pairs not. way around appears to grab location separately , save(), point of eager loading if can't save relationship, , have make request db.