我在连接表中更新现有数据时遇到问题。这就是......
我有2个型号SalesOrders和Products，它们通过LineItems拥有belongsToMany关联。
products
+-------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+---------------------+------+-----+---------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| name | int(11) | NO | | NULL | |
+-------------+---------------------+------+-----+---------+----------------+
sales_orders
+--------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+---------------------+------+-----+---------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| order_number | int(11) | NO | | NULL | |
+--------------+---------------------+------+-----+---------+----------------+
line_items
+----------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------+---------------------+------+-----+---------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| sales_order_id | int(11) unsigned | NO | | NULL | |
| product_id | int(11) unsigned | NO | | NULL | |
| qty | int(11) | NO | | NULL | |
+----------------+---------------------+------+-----+---------+----------------+创建新的销售订单按预期工作。我可以在添加新的销售订单页面上将多个产品和数量添加到销售订单。所有正确的数据都会添加到连接表中。
我遇到的问题是当我尝试编辑现有销售订单时。例如，我想将某个订单项的数量从5更改为2.我打开要修改的销售订单的编辑页面，更改所需订单项的数量，然后提交表单。表单成功提交但联接表未更新。这似乎是我无法工作的非常基本的功能。我的所有代码都经过了一些小修改。
SalesOrdersTable：
$this->belongsToMany('Products', [
'foreignKey' => 'sales_order_id',
'targetForeignKey' => 'product_id',
'through' => 'LineItems',
]);
ProductsTable：
$this->belongsToMany('SalesOrders', [
'foreignKey' => 'product_id',
'targetForeignKey' => 'sales_order_id',
'through' => 'LineItems',
]);
LineItemsTable：
$this->belongsTo('Products', [
'foreignKey' => 'product_id',
'joinType' => 'INNER'
]);
$this->belongsTo('SalesOrders', [
'foreignKey' => 'sales_order_id',
'joinType' => 'INNER'
]);
SalesOrdersController编辑：
public function edit($id = null)
{
$salesOrder = $this->SalesOrders->get($id, [
'contain' => ['Products']
]);
if ($this->request->is(['patch', 'post', 'put'])) {
$salesOrder = $this->SalesOrders->patchEntity($salesOrder, $this->request->data);
if ($this->SalesOrders->save($salesOrder)) {
$this->Flash->success(__('The sales order has been saved.'));
return $this->redirect(['action' => 'index']);
} else {
$this->Flash->error(__('The sales order could not be saved. Please, try again.'));
}
}
$products = $this->SalesOrders->Products->find('list', ['limit' => 200]);
$this->set(compact('salesOrder', 'products'));
$this->set('_serialize', ['salesOrder']);
}
SalesOrders模板edit.ctp
echo $this->Form->input('order_number');
echo $this->Form->input('products.0.id', [
'type' => 'select',
'options' => $products
]);
echo $this->Form->input('products.0._joinData.qty');
在提交表单时，SalesOrder实体看起来像这样，将数量从5更改为2。
object(App\Model\Entity\SalesOrder) {
'id' => (int) 1,
'order_number' => 'SO1111',
'products' => [
(int) 0 => object(App\Model\Entity\Product) {
'id' => '1',
'name' => 'Acme Widget 1',
'_joinData' => object(App\Model\Entity\LineItem) {
'id' => (int) 1,
'product_id' => (int) 1,
'sales_order_id' => (int) 1,
'qty' => (int) 2,
'[new]' => false,
'[accessible]' => [
'*' => true
],
'[dirty]' => [
'qty' => true
],
'[original]' => [
'qty' => (int) 5
],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'LineItems'
},
'[new]' => false,
'[accessible]' => [
'*' => true,
'_joinData' => true
],
'[dirty]' => [
'_joinData' => true
],
'[original]' => [
'_joinData' => object(App\Model\Entity\LineItem) {
'id' => (int) 1,
'product_id' => (int) 1,
'sales_order_id' => (int) 1,
'qty' => (int) 2,
'[new]' => false,
'[accessible]' => [
'*' => true
],
'[dirty]' => [
'qty' => true
],
'[original]' => [
'qty' => (int) 5
],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'LineItems'
}
],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'Products'
}
],
'[new]' => false,
'[accessible]' => [
'*' => true
],
'[dirty]' => [],
'[original]' => [],
'[virtual]' => [],
'[errors]' => [],
'[invalid]' => [],
'[repository]' => 'SalesOrders'
}
正如您所看到的，SalesOrder上的脏属性为空。它没有发现产品_joinData已被修改。
如果我添加$ salesOrders-＆gt; dirty（'products'，true）;就在调用save（）之前，连接表会更新。虽然这有效，但我可以编写一些逻辑来以这种方式处理更新，但我觉得有更好/正确的方法来做到这一点。
提前感谢任何帮助。