我的模型中有一个数组列:
t.text :sphare, array: true, default: []
我想验证它只包含列表中的元素(“好”,“坏”,“中立”)
我的第一次尝试是:
validates_inclusion_of :sphare, in: [ ["Good"], ["Bad"], ["Neutral"] ]
但是当我想在sphare ex([“Good”,“Bad”]中创建具有多个值的对象时,验证器将其剪切为[“Good”]。
我的问题是:
如何编写一个验证,只检查传递的数组的值,而不将其与修复示例进行比较?
编辑我的FactoryGirl的已添加部分并测试failds:
FactoryGirl的一部分:
sphare ["Good", "Bad"]
和我的rspec测试:
it "is not valid with wrong sphare" do
expect(build(:skill, sphare: ["Alibaba"])).to_not be_valid
end
it "is valid with proper sphare" do
proper_sphare = ["Good", "Bad", "Neutral"]
expect(build(:skill, sphare: [proper_sphare.sample])).to be_valid
end
答案 0 :(得分:1)
这样做:
validates :sphare, inclusion: { in: ["Good", "Bad", "Neutral"] }
或者,您可以通过使用创建字符串数组的简短形式来表达:%w(Good Bad Neutral)
:
validates :sphare, inclusion: { in: %w(Good Bad Neutral) }
有关inclusion
的更多用法和示例,请参阅Rails Documentation。
由于Rails内置验证器不符合您的要求,您可以在模型中添加自定义验证器,如下所示:
validate :correct_sphare_types
private
def correct_sphare_types
if self.sphare.blank?
errors.add(:sphare, "sphare is blank/invalid")
elsif self.sphare.detect { |s| !(%w(Good Bad Neutral).include? s) }
errors.add(:sphare, "sphare is invalid")
end
end
答案 1 :(得分:0)
您可以实现自己的ArrayInclusionValidator
:
# app/validators/array_inclusion_validator.rb
class ArrayInclusionValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
# your code here
record.errors.add(attribute, "#{attribute_name} is not included in the list")
end
end
在模型中,它看起来像这样:
# app/models/model.rb
class YourModel < ApplicationRecord
ALLOWED_TYPES = %w[one two three]
validates :type_of_anything, array_inclusion: { in: ALLOWED_TYPES }
end
示例可以在这里找到