Rails - Feb 2006 - validations and directing errors

I am starting to play with validations as I want to catch errors before
SQL rejects inserts to the table which are ugly when nulls are sent to
''Not Null'' columns, etc.

If I do something in my model like...

validates_format_of   :first_name,
                      :with      => /^\w+$/,
                      :message   => "you moron, enter a name"

I still end up getting the trace window and not the output in the form
itself where I would expect it to display with a first line that reads:

<%= error_messages_for ''client'' %>
>From Agile book and from rails.rubyonrails.com, I can see that I can use
rescue_action_in_public(exception) but that seems to be for trapping
against not found pages.

How do I capture these errors and stay within my form and display my
'':message'' there?

Craig

Are you redirecting at the end of the action that would have the validation
error? That
tripped me up for a while.

I finally wound up putting the model object in the flash if there were errors.
In my
"add_comment" action, I have:

     if @comment.save
       flash[:notice] = ''Comment added.''
     else
       flash[:comment] = @comment
     end
     redirect_to :action => ''show'', :id => @proposal

And then I have to do this in the view:

<% @comment = @flash[:comment]
     if(not @comment.nil?)
%>
<%= error_messages_for(:comment)%>
<%  end %>

which seems annoying. I want to always redirect so that I never get the
form''s action url
let in the browser address bar.

Now, this may not actually be your problem and there could quite easily be a
cleaner
solution to this. But hopefully I''ll be right about the redirect and
that''ll at least get
you somewhere!

b


Craig White wrote:
> I am starting to play with validations as I want to catch errors before
> SQL rejects inserts to the table which are ugly when nulls are sent to
> ''Not Null'' columns, etc.
> 
> If I do something in my model like...
> 
> validates_format_of   :first_name,
>                       :with      => /^\w+$/,
>                       :message   => "you moron, enter a name"
> 
> I still end up getting the trace window and not the output in the form
> itself where I would expect it to display with a first line that reads:
> 
> <%= error_messages_for ''client'' %>
> 
>>From Agile book and from rails.rubyonrails.com, I can see that I can use
> rescue_action_in_public(exception) but that seems to be for trapping
> against not found pages.
> 
> How do I capture these errors and stay within my form and display my
> '':message'' there?
> 
> Craig
> 
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

I''ve been having exactly the same problem, this works for me.

There must be a cleaner way of doing this, but I''m over my blocker now
so thanks!

Mat.


Ben Munat wrote:
> Are you redirecting at the end of the action that would have the 
> validation error? That
> tripped me up for a while.
> 
> I finally wound up putting the model object in the flash if there were 
> errors. In my
> "add_comment" action, I have:
> 
>      if @comment.save
>        flash[:notice] = ''Comment added.''
>      else
>        flash[:comment] = @comment
>      end
>      redirect_to :action => ''show'', :id =>
@proposal
> 
> And then I have to do this in the view:
> 
> <% @comment = @flash[:comment]
>      if(not @comment.nil?)
> %>
> <%= error_messages_for(:comment)%>
> <%  end %>
> 
> which seems annoying. I want to always redirect so that I never get the 
> form''s action url
> let in the browser address bar.
> 
> Now, this may not actually be your problem and there could quite easily 
> be a cleaner
> solution to this. But hopefully I''ll be right about the redirect
and
> that''ll at least get
> you somewhere!
> 
> b
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