cakephp多重选择不工作

我有两个表“business”和

business\u categories

，它们的关联如下

BusinessesTable.php

$this->hasMany('SellerBusinessCategories', [
    foreignKey => 'business_id'
]);

public function add()
{
    $sellerBusiness = $this->SellerBusinesses->newEntity();
    if ($this->request->is('post')) {
        $sellerBusiness->seller_id = $this->Auth->user('id');
        $sellerBusiness = $this->SellerBusinesses->patchEntity($sellerBusiness, $this->request->data, [
          'associated' => [
            'SellerBusinessCategories'
          ]
        ]);
        if ($this->SellerBusinesses->save($sellerBusiness)) {
            $this->Flash->success(__('The seller business has been saved.'));

            return $this->redirect(['action' => 'index']);
        } else {
            $this->Flash->error(__('The seller business could not be saved. Please, try again.'));
        }
    }
    $categories = $this->SellerBusinesses->SellerBusinessCategories->Categories->find('list', ['limit' => 200]);
    $sellers = $this->SellerBusinesses->Sellers->find('list', ['limit' => 200]);
    $this->set(compact('sellerBusiness', 'sellers', 'categories'));
    $this->set('_serialize', ['sellerBusiness']);

}

我必须在

业务

表中输入多个类别以及

业务

这就是输入字段在

add.ctp

视图中的显示方式

<?= $this->Form->input('seller_business_categories._category_ids', [
        'options' => $categories,
        'multiple' => true,
        'type' => 'select',
        'class' => 'form-control select2',
        'label' => false
    ])
?>

而且表格没有提交。删除

multiple=>true

并将

business\u类别替换为
business.category\u id
工作正常

少了什么吗

编辑2

sellerbusinesscontroller.php

$this->hasMany('SellerBusinessCategories', [
    foreignKey => 'business_id'
]);

public function add()
{
    $sellerBusiness = $this->SellerBusinesses->newEntity();
    if ($this->request->is('post')) {
        $sellerBusiness->seller_id = $this->Auth->user('id');
        $sellerBusiness = $this->SellerBusinesses->patchEntity($sellerBusiness, $this->request->data, [
          'associated' => [
            'SellerBusinessCategories'
          ]
        ]);
        if ($this->SellerBusinesses->save($sellerBusiness)) {
            $this->Flash->success(__('The seller business has been saved.'));

            return $this->redirect(['action' => 'index']);
        } else {
            $this->Flash->error(__('The seller business could not be saved. Please, try again.'));
        }
    }
    $categories = $this->SellerBusinesses->SellerBusinessCategories->Categories->find('list', ['limit' => 200]);
    $sellers = $this->SellerBusinesses->Sellers->find('list', ['limit' => 200]);
    $this->set(compact('sellerBusiness', 'sellers', 'categories'));
    $this->set('_serialize', ['sellerBusiness']);

}

关于调试：调试（$this->request->data），给出

]，
我认为您获取列表的查询不够清晰

<select>
 <option value="$AAA">$BBB</option>
</select>

希望能有帮助

编辑#2

遵循我的代码。当我调试时，它将显示如下（有越南城市）

这是我的数据库。

这是我的查询后调试

[
    (int) 0 => 'Select city',
    (int) 1 => 'Thành phố Hà Nội',
    (int) 2 => 'Tỉnh Hà Giang',
    (int) 3 => 'Tỉnh Cao Bằng',
    (int) 4 => 'Tỉnh Bắc Kạn',
    (int) 5 => 'Tỉnh Tuyên Quang',
    (int) 6 => 'Tỉnh Lào Cai',
    (int) 7 => 'Tỉnh Điện Biên',
    (int) 8 => 'Tỉnh Lai Châu',
    (int) 9 => 'Tỉnh Sơn La',
    (int) 10 => 'Tỉnh Yên Bái',
]

必须定义选择框才能知道id（值）和文本的位置。因为在您的表中可能会有许多列（字段）。
我认为您获取列表的查询不够清晰

<select>
 <option value="$AAA">$BBB</option>
</select>

希望能有帮助

编辑#2

遵循我的代码。当我调试时，它将显示如下（有越南城市）

这是我的数据库。

这是我的查询后调试

[
    (int) 0 => 'Select city',
    (int) 1 => 'Thành phố Hà Nội',
    (int) 2 => 'Tỉnh Hà Giang',
    (int) 3 => 'Tỉnh Cao Bằng',
    (int) 4 => 'Tỉnh Bắc Kạn',
    (int) 5 => 'Tỉnh Tuyên Quang',
    (int) 6 => 'Tỉnh Lào Cai',
    (int) 7 => 'Tỉnh Điện Biên',
    (int) 8 => 'Tỉnh Lai Châu',
    (int) 9 => 'Tỉnh Sơn La',
    (int) 10 => 'Tỉnh Yên Bái',
]

必须定义选择框才能知道id（值）和文本的位置。因为您的表中可能有许多列（字段）。
添加控制器代码在编辑2中添加控制器代码在编辑2中添加控制器代码请查看调试结果（$this->request->data）。我不认为问题出在分类上，也许你误解了我提到的。因为您显示的错误是“1364字段‘category_id’在business_categories中没有默认值”，所以我认为我的想法是正确的。请查看我的编辑#2了解更多信息。请查看调试结果（$this->request->data）。我不认为问题出在分类上，也许你误解了我提到的。因为您显示的错误是“1364字段‘category_id’在business_categories中没有默认值”，所以我认为我的想法是正确的。请查看我的编辑2以了解更多信息。