添加模型验证{Rails}

Question

我有两个模型关联: Survey_question和survey_answer。

Survey_question模型

class SurveyAnswer < ApplicationRecord
belongs_to :survey_question

validates_presence_of :answer_content, if: "answer_type!=Radio Button"
end

Survey_question模型

class SurveyQuestion < ApplicationRecord
belongs_to :user
belongs_to :survey

has_many :survey_answers
accepts_nested_attributes_for :survey_answers, allow_destroy: true

has_many :survey_responses
accepts_nested_attributes_for :survey_responses

validates :question_content, presence: true
validates :answer_type, presence:  true
end

我只是想验证一下，当answer_content _ answer_type是"Radio“时，是否存在answer_type？我怎样才能做到这一点？提前谢谢。

Answer 1

我不确定您是基于在示例中使用if还是unless来查找!=，但请尝试以下操作：

validates_presence_of :answer_content, if: ->(answer) { answer.survey_question.answer_type == 'Radio Button' }