插入数组列查询生成器laravel

Question

I am using laravel and I want to insert an array to a column but it gives me this error I do not why

here is my query

        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]
          , ]);

and here is model

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

and error is for this

$request->specification

here is a dd of this

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

gives me this error

Array to string conversion

Answer 1

Casts only work when you use Eloquent Models to execute the queries. When you use the Query Builder directly, your casts are not executed, so you are trying to bind an array to a MySQL query.

Either manually json_encode the value:

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

Or use the eloquent model:

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

Answer 2

Convert Your Array to string

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

If you want to use DB then you have to user json_encode to save array in your database

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
          ]
          , ]);