rails在模型中验证值是否在数组内 [英] rails validate in model that value is inside array

问题描述

我有一个表单，我在其中传递了一个名为 :type的字段，我想检查其值是否在允许的类型数组之内，以便使不允许任何人发布不允许的类型.

I have a form where i pass a field named :type and i want to check if it's value is inside an array of allowed types so that no one is allowed to post not-allowed types.

数组看起来像

@allowed_types = [
   'type1',
   'type2',
   'type3',
   'type4',
   'type5',
   'type6',
   'type7',
   etc...
]

我已经尝试使用 validates_exclusion_of或validates_inclusion_of，但似乎无法正常工作

i have tried using validates_exclusion_of or validates_inclusion_of but it doesn't seem to work

推荐答案

首先，将属性从类型更改为其他类型，类型是保留的属性名称，用于单表继承等.

first, change the attribute from type to something else, type is a reserved attrubute name use for Single Table Inheritance and such.

class Thing < ActiveRecord::Base
   validates :mytype, :inclusion=> { :in => @allowed_types }

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