Add Model Validation {Rails}

Question

I have two model association as follows: Survey_question and survey_answer.

Survey_question Model

class SurveyAnswer < ApplicationRecord
belongs_to :survey_question

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

Survey_question Model

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

I just to validate presence of survey_answer's answer_content when survey_question's answer_type is "Radio Button" ? how can I achieve this ?? thanks in advance.

abax · Accepted Answer · 2018-05-14 19:22:05Z

1

I'm not sure if you are looking for an if or unless based on using != in your example, but try the following:

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

answered May 14, 2018 at 19:22

abax

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4 Comments

user9737634 Over a year ago

I have answer_type in survey_question model and want to validate presence answer_content from survey_answer only if I have answer_type value i.e. radio button

Tom Lord Over a year ago

So... Yes, I think this answers your question? Can you confirm whether it solves your problem? If yes, and you are happy with the solution, mark the answer as correct.

user9737634 Over a year ago

no it doesn't. can you tell me what does answer stands for ?

abax Over a year ago

By using the above validation your SurveyAnswer will only validate the presence of answer_content when the related SurveyQuestion answer type is Radio Button. If you want to only validate the presence of answer_content when the type is not 'Radio Button' then replace the if with unless.

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