How do I add validation to a partial in Rails 3? - validation

Question

This is the error I am getting:
ArgumentError in Home#index
Showing /app/views/clients/_form.html.erb where line #6 raised:
You need to supply at least one validation
Extracted source (around line #6):
3: render :partial => "clients/form",
4: :locals => {:client => client}
5: -%>
6: <% client ||= Client.new
7: new_client = client.new_record? %>
8: <%= form_for(client, :html => { :class=>"ajax-form", :id => "client-ajax-form"}, :remote => true, :disable_with => (new_client ? "Adding..." : "Saving...")) do |f| %>
9: <div class="validation-error" style="display:none"></div>
My client model looks like this:
class Client < ActiveRecord::Base
# the user model for the client
belongs_to :user
has_many :projects, :order => 'created_at DESC', :dependent => :destroy
#The following produces the designers for a particular client.
#Get them from the relations where the current user is a client.
has_one :ownership, :dependent => :destroy
has_one :designer, :through => :ownership
validates :name, :presence => true,
:length => {:minimum => 1, :maximum => 128}
validates :number_of_clients
def number_of_clients
Authorization.current_user.clients.count <= Authorization.current_user.plan.num_of_clients
end
end
This is how the app/views/client/_form.html.erb partial looks:
<%#
Edit a single client
render :partial => "clients/form",
:locals => {:client => client}
-%>
<% client ||= Client.new
new_client = client.new_record? %>
<%= form_for(client, :html => { :class=>"ajax-form", :id => "client-ajax-form"}, :remote => true, :disable_with => (new_client ? "Adding..." : "Saving...")) do |f| %>
<div class="validation-error" style="display:none"></div>
<div>
<label for="client_name"><span class="icon name-icon"> </span></label>
<input type="text" class="name" size="20" name="client[name]" id="client_name" value="<%= client.name %>" > <%= f.submit(new_client ? "Add" : "Save", :class=> "green awesome")%>
</div>
<% end %>
<% content_for(:deferred_js) do %>
// From the Client Form
$('#client-ajax-form')
.bind("ajax:success", function(evt, data, status, xhr){
console.log("Calling Step View");
compv.updateStepView('client', xhr);
});
<% end %>
How do I fix that error ?

Answer 1

The problem is caused by the following line in your model:
validates :number_of_clients
When you use validates (s in the end) you have to follow the default rails validations like you did with the name validation. However, when you use a custom method to do the validation, you should use validate instead. So this should work:
validate :number_of_clients