Rails core - May 2007 - for_for and validates_uniqueness_of problems

I have the following:

class Dummy < ActiveRecord::Base
     validates_uniqueness_of :dummy
end

def update
      @d = Dummy.new(params[:dummy])
end


<% form_for :dummy, @dummy, :url => {:action => "update" } do
|form| %>
<%= error_messages_for :dummy %>

<%= form.text_field :dummy  %>
<%= form.text_field :dummy2 %>
<%= submit_tag %>
<% end %>


My purpose is to display a error_message "No duplicate entry 
allowed" when someone tries to enter a dummy which is always in the 
database. How to do this!

validates_uniqueness_of works as I''am not able to insert to 
idendical entries to the database - but the only thing I get on my 
screen is:


#ActiveRecord::RecordInvalid in DummyController#update
#Validation failed: Dummy has already been taken
#RAILS_ROOT: script/../config/..
#Application Trace | Framework Trace | Full Trace

.
.
.


Isn''t "error_messages_for" the way to display individual
error messages?

Thanx

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Jochen,

You might get better response by posting to the general Rails mailing  
list (http://groups.google.com/group/rubyonrails-talk). This list is  
for topics regarding the development of Rails itself.

You probably get the error page because you use save! (with  
exclamation mark) instead of just save. save! raises an error if the  
validations fail.

Cheers,
//jarkko

On 28.5.2007, at 12.19, jochen kaechelin wrote:
>
> I have the following:
>
> class Dummy < ActiveRecord::Base
>      validates_uniqueness_of :dummy
> end
>
> def update
>       @d = Dummy.new(params[:dummy])
> end
>
>
> <% form_for :dummy, @dummy, :url => {:action => "update"
} do |
> form| %>
> <%= error_messages_for :dummy %>
>
> <%= form.text_field :dummy  %>
> <%= form.text_field :dummy2 %>
> <%= submit_tag %>
> <% end %>
>
>
> My purpose is to display a error_message "No duplicate entry
> allowed" when someone tries to enter a dummy which is always in the
> database. How to do this!
>
> validates_uniqueness_of works as I''am not able to insert to
> idendical entries to the database - but the only thing I get on my
> screen is:
>
>
> #ActiveRecord::RecordInvalid in DummyController#update
> #Validation failed: Dummy has already been taken
> #RAILS_ROOT: script/../config/..
> #Application Trace | Framework Trace | Full Trace
>
> .
> .
> .
>
>
> Isn''t "error_messages_for" the way to display individual
error
> messages?
>
> Thanx
>
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> You received this message because you are subscribed to the Google  
> Groups "Ruby on Rails: Core" group.
> To post to this group, send email to rubyonrails-core@googlegroups.com
> To unsubscribe from this group, send email to rubyonrails-core- 
> unsubscribe@googlegroups.com
> For more options, visit this group at http://groups.google.com/ 
> group/rubyonrails-core?hl=en
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>
--
Jarkko Laine
http://jlaine.net
http://dotherightthing.com
http://www.railsecommerce.com
http://odesign.fi