multiple select for hasMany association in CakePHP 3 - cakephp

Question

I have two tables seller_businesses and seller_business_categories. and their association is as follows
SellerBusinessesTable.php
$this->hasMany('SellerBusinessCategories', [
'foreignKey' => 'seller_business_id'
]);
SellerBusinessCategories.php
$this->belongsTo('SellerBusinesses', [
'foreignKey' => 'seller_business_id',
'joinType' => 'INNER'
]);
I'm using a single form to save data in both tables
<?= $this->Form->create($sellerBusiness, ['type' => 'file']) ?>
<?= $this->Form->input('company_name') ?>
<?= $this->Form->input('proof', ['type' => 'file']) ?>
<?= $this->Form->input('seller_business_categories._category_ids', ['multiple' => true, 'options' => $categories]) ?>
<?= $this->Form->button('submit', ['type' => 'submit']) ?>
<?= $this->Form->end() ?>
And controller action is
$sellerBusiness = $this->SellerBusinesses->newEntity();
if ($this->request->is('post')) {
$sellerBusiness->seller_id = $this->Auth->user('id');
$sellerBusiness = $this->SellerBusinesses->patchEntity($sellerBusiness, $this->request->data, [
'associated' => [
'SellerBusinessCategories'
]
]);
debug($sellerBusiness);
if ($save_s_b = $this->SellerBusinesses->save($sellerBusiness)) {
debug($save_s_b);
$this->Flash->success(__('The seller business has been saved.'));
return $this->redirect(['controller' => 'SellerBusinesses', 'action' => 'view', $save_s_b->id]);
} else {
$this->Flash->error(__('The seller business could not be saved. Please, try again.'));
}
}
But this is not saving record to seller_business_categories table.
From document Here
// Multiple select element for belongsToMany
echo $this->Form->input('tags._ids', [
'type' => 'select',
'multiple' => true,
'options' => $tagList,
]);
But this is not working. Is there any other way for hasMany
debug($this->request->data); gives
'seller_business_categories' => [
'_category_ids' => [
(int) 0 => '1',
(int) 1 => '2'
]
],
and debug($sellerBusiness); after patchEntity
object(App\Model\Entity\SellerBusiness) {
'seller_id' => (int) 16,
'company_name' => 'My company',
'seller_business_categories' => [
(int) 0 => object(App\Model\Entity\SellerBusinessCategory) {
(int) 0 => '1',
(int) 1 => '2',
'[new]' => true,
'[accessible]' => [
'*' => true
],
'[dirty]' => [
(int) 0 => true,
(int) 1 => true
],
'[original]' => [],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'SellerBusinessCategories'
}
],
'[new]' => true,
'[accessible]' => [
'*' => true,
],
'[dirty]' => [
'seller_id' => true,
'company_name' => true,
'seller_business_categories' => true,
],
'[original]' => [],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'SellerBusinesses'
}
and error
Error: SQLSTATE[HY000]:
General error: 1364 Field 'category_id' doesn't have a default value in seller_business_categories table

Answer 1

SellerBusinessesTable
$this->belongsToMany('Categories');
CategoriesTable
$this->belongsToMany('SellerBusinesses', [
'foreignKey' => 'category_id',
'targetForeignKey' => 'seller_business_id',
'joinTable' => 'categories_seller_businesses'
]);
// Pivot tables must be sorted alphabetically
bin/cake bake migration CreateCategoriesSellerBusinesses seller_business_id:integer category_id:integer created modified
CategoriesSellerBusinessesTable
$this->belongsTo('SellerBusinesses', [
'foreignKey' => 'seller_business_id',
'joinType' => 'INNER'
]);
$this->belongsTo('Categories', [
'foreignKey' => 'category_id',
'joinType' => 'INNER'
]);
Add.ctp
<?= $this->Form->create($sellerBusiness, ['type' => 'file']) ?>
...
<?= $this->Form->input('categories', ['type' => 'select', 'options' => $categories, 'multiple' => 'select', 'label' => __('Categories')]) ?>
...
<?= $this->Form->end() ?>
SellerBusinessesController
public function add()
{
$sellerBusiness = $this->SellerBusinesses->newEntity();
if ($this->request->is('post')) {
$sellerBusiness = $this->SellerBusinesses->patchEntity($sellerBusiness, $this->request->data);
$sellerBusiness->seller_id = $this->Auth->user('id');
if(isset($this->request->data['categories']))
{
$sellerBusiness -> categories = $this->SellerBusinesses->Categories->find()->where(['id IN' => $this->request->data['categories']])->all()->toArray();
}
if ($this->SellerBusinesses->save($sellerBusiness)) {
$this->Flash->success(__('The sellerBusiness has been saved.'));
return $this->redirect(['action' => 'index']);
} else {
$this->Flash->error(__('The seller could not be saved. Please, try again.'));
}
}
$categories = $this -> SellerBusinesses-> Categories-> find('treeList');
$this->set(compact('sellerBusiness', 'categories'));
$this->set('_serialize', ['sellerBusiness']);