CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3validation
Sharethefun
Sharethefun

Reputation: 824

Validation on has_many relationship Rails3

I have a question model:

class Question < ActiveRecord::Base  
  has_many :answers, :dependent => :destroy

That has many answers:

class Answer < ActiveRecord::Base
   belongs_to :question, :counter_cache => true
   validates :body,
             :presence => true,
             :length => {:minimum => 3, :maximum => 4096}

I have a form under a question page, so I can submit answers.

The problem is that after I create a new answer I'm redirected back to the question so, I cannot see any validation errors.

Does anyone knows how to see validation errors from answers on a question page?

This is views/questions/show.html.erb

    <%= render :partial => @answers %>

<%= form_for [@question, Answer.new] do |f| %>

    <div class="formline">
    <div class="formlabelcenter"><%= f.label :body, "New Answer" %></div>
    <div class="formfield"> <%= f.text_area :body, :class => "mceEditor" %></div>
    </div>

    <div class="formline">
    <div class="submit">
    <%= f.submit "Add Answer" %></div>
    </div>
<% end %>

When I try to render the question it gets me to: 

http://0.0.0.0:3000/questions/question-name/answers

and not to 

http://0.0.0.0:3000/questions/question-name

Upvotes: 0

Views: 531

Answers (2)

Jimmy
Jimmy

Reputation: 9815

You have nothing displaying the errors in your view code that displays the question form, try this (note the change of Answer.new to @answer, so this will display the same model that fails validation in the controller)

<%= form_for [@question, @answer || Answer.new] do |f| %>
  <% if @answer && @answer.errors.any? %>
    <div class='errors'>
      <h2>
        <%= pluralize(@answer.errors.count, "error") %> 
        prohibited this user from being saved:
      </h2> 
      <ul>
      <% @answer.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>  
      <% end %>
      </ul>
    </div>
  <% end %>
  <% # your view code here %>
<% end %>

Upvotes: 1

Gabriel
Gabriel

Reputation: 1843

When detecting the error in your controller, store its message in flash[:error]. Then, in the view, check for the existance of :error in the flash hash. If it exists, display it as an error message.

Upvotes: 0

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