我是Ruby on Rails的新手,所以如果问题听起来很愚蠢或是一个重复的问题,请抱歉,但我已经找到了答案,但没有成功。
我有以下示例
用户类
class User < ApplicationRecord
has_many :preference, dependent: :destroy
end
偏好类
class Preference < ApplicationRecord
belongs_to :user
end
所以我正在尝试使用以下代码创建一个新的Preference
preference = PreferenceService.validate_start_and_end_date(Preference.new(preference_params))
然后我想保存如下
current_user.preference.save(preference)
我尝试了多种方法但没有成功。我正在使用ruby 2.5.3p105和Rails 5.2.1.1
谢谢
这里有一些关于上面代码的想法
因为你使用has_many,你必须遵循带有首选项的rails约定(复数形式)
class User < ApplicationRecord
has_many :preferences, dependent: :destroy
end
偏好类
class Preference < ApplicationRecord
belongs_to :user
validate :valid_start_and_end_date?
private
def valid_start_and_end_date?
# here you do rule validation for start_date and end_date field
# for example you check end_date value must greater than or equal start_date
start_date <= end_date
end
end
使用此步骤创建首选项
since each preference must have a user then first you must
@preference = Preference.new(preference_params)
@user = User.find_by_username("johndoe")
@preference.user = @user
@preference.save