Question

我正在使用laravel，我想将数组插入到列中，但这给了我这个错误我不为什么

这是我的查询

        DB::table('cart_product')->insert([
          ['product_id' => $request->product_id,'quantity' => $request->quantity, 'cart_id' => \Auth::user()->cart()->get()->first()->id, 'color_id' => $request->color, 'total_price' => $productPrice, 'specification' => $request->specification]
          , ]);

这是模型

class CartProduct extends Model
{
  use SoftDeletes;
  protected $guarded = ['id'];
  protected $dates = ['deleted_at'];
  protected $table = 'cart_product';
  protected $casts = ['specification' => 'array'];
  }
}

这是错误的

$request->specification

这是这里的

array:4 [▼
  0 => "4"
  1 => "7"
  2 => "8"
  3 => "9"
]

给我这个错误

数组到字符串的转换

Answer 1

仅当您使用雄辩的模型执行查询时，才起作用。直接使用查询生成器时，不会执行强制转换，因此您尝试将数组绑定到MySQL查询。

手动json_encode值：

DB::table('cart_product')->insert([
    ['specification' => \json_encode($request->specification)]
]);

或者使用雄辩的模型：

CartProduct::create([
    'specification' => $request->specification,
]);

Answer 2

将数组转换为字符串

DB::table('cart_product')->insert([[
 'product_id' => $request->product_id,
 'quantity' => $request->quantity,
 'cart_id' => \Auth::user()->cart()->get()->first()->id,
 'color_id' => $request->color, 
 'total_price' => $productPrice, 
 'specification' => '[4, 7, 8, 9]'
]]);

Answer 3

如果要使用DB，则必须使用json_encode将数组保存到数据库中

DB::table('cart_product')->insert([
          [
          'product_id' => $request->product_id, 
          'quantity' => $request->quantity,
          'cart_id' => \Auth::user()->cart()->get()->first()->id, 
          'color_id' => $request->color,
          'total_price' => $productPrice,
          'specification' => json_encode($request->specification) // add json_enocde here
          ]
          , ]);

插入数组列查询构建器laravel

3 个答案: