Adding user and associated data CakePhp 3.x and receive validation errors for associated data -

i have scoured internet , tried figuring out docs, don't understand doing wrong.

i have users can have membership , many orders. membership , orders associated membership level. unsure if these associations correct, think are.

here associations:

users:

    $this->hasone('memberships', [         'foreignkey' => 'user_id',         'jointype' => 'inner'     ]);     $this->hasmany('membershiporders', [         'foreignkey' => 'user_id',         'jointype' => 'inner'     ]); 

orders:

    $this->belongsto('users', [         'foreignkey' => 'user_id',         'jointype' => 'inner'     ]);     $this->hasone('membershiplevels', [         'foreignkey' => 'membership_level_id',         'jointype' => 'inner'     ]); 

memberships:

    $this->belongsto('users', [         'foreignkey' => 'user_id',         'jointype' => 'inner'     ]);     $this->hasone('membershiplevels', [         'foreignkey' => 'membership_level_id',         'jointype' => 'inner'     ]); 

membershiplevels:

    $this->belongstomany('membershiporders', [         'foreignkey' => 'membership_level_id',         'jointype' => 'inner'     ]);      $this->belongstomany('memberships', [         'foreignkey' => 'membership_level_id',         'jointype' => 'inner'     ]); 

in users controller trying have function add user, membership record, , order user.

i trying make sure validation errors shown if associated data in form.

in controller function have:

public function checkout($id = null) {     $user = $this->users->newentity($this->request->data(), [         'associated' => [             'membershiporders' => ['associated' => ['membershiplevels']]         ]     ]);     $membershiplevel = $this->users->memberships->membershiplevels->get($id);     if ( $this->request->is('post') ) {         $user = $this->users->patchentity( $user, $this->request->data(), [             'associated' => [                 'membershiporders' => ['associated' => ['membershiplevels']]             ]         ]);         if ( $this->users->save($user, ['associated' => ['membershiporders' => ['associated' => ['membershiplevels']]]]) ) {             $this->flash->success(__('user has been added.'));         } else {             $this->flash->error(__('user not added. please, try again.'));         }     }     $this->set(compact('user', 'membershiplevel'));     $this->set('_serialize', ['user', 'membershiplevel']); } 

a simple form view is:

    <?= $this->form->create($user, ['id' => 'userform']) ?>         <fieldset>             <legend><?= __('primary member') ?></legend>             <?= $this->form->input('full_name', ['required' => false]) ?>             <?= $this->form->input('username', ['required' => false]) ?>             <?= $this->form->input('email', ['required' => false]) ?>             <?= $this->form->input('password', ['required' => false]) ?>             <?= $this->form->input('password_confirmation', ['type' => 'password', 'required' => false]) ?>             <?= $this->form->input('specialty', ['required' => false]) ?>             <?= $this->form->input('membership_orders.0.billing_name', ['label' => 'name', 'data-stripe' => 'name', 'required' => false] ) ?>             <?= $this->form->input('membership_orders.0.billing_street_1', ['label' => 'address 1', 'required' => false] ) ?>             <?= $this->form->input('membership_orders.0.billing_street_2', ['label' => 'address 2', 'required' => false] ) ?>             <?= $this->form->input('membership_orders.0.billing_city', ['label' => 'city', 'data-stripe' => 'address_city', 'required' => false] ) ?>         </fieldset>         <?= $this->form->button(__('join'), ['id' => 'submitbtn', 'class' => 'btn']) ?>     <?= $this->form->end() ?> 

i have tried membershiporders, membershiporders, current membership_orders, , , without .0 in form , cannot validation errors order information. billing info added orders table , exact table name "membership_orders".

shouldn't cake sending associated validation errors form well?