使用活动记录搜索序列化数据

Question

我正在尝试对序列化列进行简单查询，您该怎么做？serialize :mycode, Array1.9.3p125 :026 > MyModel.find(104).mycode  MyModel Load (0.6ms)  SELECT `mymodels`.* FROM `mymodels` WHERE `mymodels`.`id` = 104 LIMIT 1 => [43565, 43402] 1.9.3p125 :027 > MyModel.find_all_by_mycode("[43402]")  MyModel Load (0.7ms)  SELECT `mymodels`.* FROM `mymodels` WHERE `mymodels`.`mycode` = '[43402]' => [] 1.9.3p125 :028 > MyModel.find_all_by_mycode(43402)  MyModel Load (1.2ms)  SELECT `mymodels`.* FROM `mymodels` WHERE `mymodels`.`mycode` = 43402 => [] 1.9.3p125 :029 > MyModel.find_all_by_mycode([43565, 43402])  MyModel Load (1.1ms)  SELECT `mymodels`.* FROM `mymodels` WHERE `mymodels`.`mycode` IN (43565, 43402) => [] 

Answer 1

序列化数组以特定方式存储在数据库中，例如：

[1, 2, 3, 4]

in

1\n 2\n 3\n etc

因此查询将是

MyModel.where("mycode like ?", "% 2\n%")

在%和之间放置空格2。