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PORails validating with two models
 

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    <p>Ok, bit confused on how to solve this issue.</p> <p>I have one form and two models. Here is my form:</p> <pre><code>&lt;% if @booking.errors.any? %&gt; &lt;% @booking.errors.full_messages.each do |msg| %&gt; &lt;p class="error"&gt;&lt;%= msg %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;% if @guest.errors.any? %&gt; &lt;% @guest.errors.full_messages.each do |msg| %&gt; &lt;p class="error"&gt;&lt;%= msg %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;%= form_for :booking, url: bookings_path do |f| %&gt; &lt;%= label_tag :email, "Guest's Email Address" %&gt; &lt;%= text_field_tag :email %&gt; &lt;%= f.label :nights, "Nights" %&gt; &lt;%= f.text_field :nights %&gt; &lt;%= f.label :nights, "People" %&gt; &lt;%= f.text_field :people %&gt; &lt;%= f.label :nights, "Arrival Date" %&gt; &lt;%= f.text_field :arrival %&gt; &lt;% end %&gt; </code></pre> <p>As you can see, the email field isn't part of the form builder. The email address will be used to create a new Guest record if the email doesn't already exist. Once I have the ID of the guest then the booking record can be made also.</p> <p>Here is the code for create action in my BookingController - where the form is submitted to...</p> <pre><code>... def create accommodation = current_user.accommodation guest = Guest.find_or_create_by(:email =&gt; params[:email]) @booking = accommodation.bookings.new(post_params.merge(:guest_id =&gt; guest.id)) if @booking.save flash[:success] = 'The booking has been added successfully.' redirect_to :controller =&gt; 'bookings', :action =&gt; 'index' else render 'new' end end ... </code></pre> <p>I do realise this question isn't new but I can't find a good solution anywhere to my problem - I want to be able to set the form up properly (if necessary) and <strong>validate</strong> all fields using the two models. Then I need to display the error messages. At the moment, my email is ignored during validation and I'm not sure what to do next.</p> <p>Any help much appreciated.</p>
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    1. COIn what sense is it being ignored? You are either selecting an existing guest or creating a new one if the email doesn't exist. Do you mean ignored when the form errors are shown?
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    2. COSorry yes - I don't know how to validate all the data as the validation rules are defined in two different models. So how can I validate email at the same time as the booking data?
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    3. COYeah, I remember your last question. Ever thought of using nested forms? http://railscasts.com/episodes/196-nested-model-form-part-1
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