Question

如何验证用户类中的名称字段？

示例：

User.create(name: { en: "name", ka: "1" }) // => ok
User.create(name: { en: "name", ka: "2" }) // => error

这是课程：

class User < ApplicationRecord
  validates :name, presence: true, json: { schema: NAME_SCHEMA }
end

这是名称架构：

{
  "type": "object",
  "properties": {
    "en": {
      "type": "string",
      "maxLength": 150
    },
    "ka": {
      "type": "string",
      "maxLength": 150
    }
  }
}

Answer 1

我相信没有内置的验证器。但是写起来很容易：

class JsonUniqValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    records = record.class.select(attribute)
    value.keys.each do |key| 
      if records.any? { |record| record.public_send(attribute)[key] == value[key] }
        record.errors[attribute] << options[:message] || "variant #{key} is not unique"
  end
end

class Person < ApplicationRecord
  validates :name, :json_uniq => true
end

如何验证json中的唯一性？

1 个答案: