Laravel错误将数据从另一个表插入到表中

Question

我正在尝试使用以下代码将表单数据和一个字段插入到产品表中，该字段是我从另一个名为“购买”的表中提取的

 Product::create([
            'purchase_id'=>$request->product,
            'price'=>$price,
            'discount'=>$request->discount,
            'description'=>$request->description,
            'purchase_purchaseprice' => Purchase::where('id',$request->product)->get('price'),
        ]);

但我收到此错误消息，我认为问题出在[{"price":"25.00"}]但我未能格式化查询以仅插入 25.00 金额，请帮忙？

Illuminate\Database\QueryException SQLSTATE[22007]：日期时间无效 格式：1366 不正确的十进制值：'[{"price":"25.00"}]' for column laravel.products.purchase_purchaseprice 在第 1 行（SQL：插入 进入products (purchase_id, price, discount, description, purchase_purchaseprice, updated_at, created_at) 值 (262, 4000, 0, ?, [{"price":"25.00"}], 2021-11-19 18:25:59, 2021-11-19 18:25:59))

这是表架构

+------------------------+------------------------+------+-----+---------+----------------+
| Field                  | Type                   | Null | Key | Default | Extra          |
+------------------------+------------------------+------+-----+---------+----------------+
| id                     | bigint(20) unsigned    | NO   | PRI | NULL    | auto_increment |
| purchase_id            | bigint(20) unsigned    | YES  | MUL | NULL    |                |
| price                  | decimal(15,2) unsigned | NO   |     | 0.00    |                |
| discount               | decimal(15,2) unsigned | NO   |     | 0.00    |                |
| description            | text                   | YES  |     | NULL    |                |
| deleted_at             | timestamp              | YES  |     | NULL    |                |
| created_at             | timestamp              | YES  |     | NULL    |                |
| updated_at             | timestamp              | YES  |     | NULL    |                |
| purchase_purchaseprice | decimal(15,2) unsigned | NO   |     | 0.00    |                |
+------------------------+------------------------+------+-----+---------+----------------+

Answer 1

看起来您将 $price 作为 json 而不是简单的小数，因此您必须对其进行解码...

另一个问题，您正在将一个数组分配给 purchase_purchaseprice' ... 解决这个问题：

 Product::create([
            'purchase_id'=>$request->product,
            'price'=>json_decode($price,true)[0]['price'],
            'discount'=>$request->discount,
            'description'=>$request->description,
            'purchase_purchaseprice' => Purchase::find($request->product)->price,
        ]);