使用laravel builder的JSON列查询

Question

我在mysql中有一个json列，我正在尝试使用laravel bulider查询该列。该列有一个json对象数组，我想在该json对象中查询一个Value属性。

use Illuminate\Database\Eloquent\Builder;

class SizeFilter
{
    public function filter(Builder $builder, $value): Builder{
    return $builder->whereJsonContains('sizes',[['Value' => $value]]);
}

我的json列结构是

 [{"SizeID":34,"Sku":null,"Value":"10","stock":2},{"SizeID":35,"Sku":null,"Value":"12","stock":0},{"SizeID":36,"Sku":null,"Value":"14","stock":0},{"SizeID":37,"Sku":null,"Value":"16","stock":0},{"SizeID":38,"Sku":null,"Value":"18","stock":0},{"SizeID":32,"Sku":null,"Value":"6","stock":0},{"SizeID":33,"Sku":null,"Value":"8","stock":1}]

Answer 1

什么是$value？它一定是一根绳子。如果是整数，JSON搜索将不起作用。

我没有Laravel，但我在MySQL客户端测试：

mysql> set @j = '...'; -- your example JSON

mysql> select json_contains(@j, '{"Value":"10"}');
+-------------------------------------+
| json_contains(@j, '{"Value":"10"}') |
+-------------------------------------+
|                                   1 |
+-------------------------------------+
1 row in set (0.00 sec)

mysql> select json_contains(@j, '{"Value":10}');
+-----------------------------------+
| json_contains(@j, '{"Value":10}') |
+-----------------------------------+
|                                 0 |
+-----------------------------------+

所以确保它是一个字符串：

return $builder->whereJsonContains('sizes',[['Value' => (string) $value]]);