Rails - Aug 2006 - View passing empty or no value to controller -- help

Hi,
I have the following view:

    <%= start_form_tag ( { :action => ''find'' }, :method
=> ''get'') %>
      <p>
        <%= text_field_tag :lemma, params[:lemma] %>
      </p>
      <%= link_to "Find It", :class => "submit" %>
    <%= end_form_tag %>

And the following find action in the controller:

  def find
      lemma = Lemma.find_by_lemma(params[:lemma])
      if lemma
        redirect_to (:controller => "lemma", :action =>
"show")
      else
        flash.now[:notice] = "Unable to find lemma: #{lemma}."
      end
  end

It appears that the view does not pass back any value to the controller, 
or passes an empty value, because the flash notice does not print any 
value of the lemma, thus:

Unable to find lemma:  .

What am I missing? Thanks for the help,
gk

-- 
Posted via http://www.ruby-forum.com/.

Gene Kahn wrote:
>   def find
>       lemma = Lemma.find_by_lemma(params[:lemma])
>       if lemma
>         redirect_to (:controller => "lemma", :action =>
"show")
>       else
>         flash.now[:notice] = "Unable to find lemma: #{lemma}."
>       end
>   end
> 
> It appears that the view does not pass back any value to the controller, 
> or passes an empty value, because the flash notice does not print any 
> value of the lemma, thus:
> 
> Unable to find lemma:  .
You want:

flash.now[:notice] = "Unable to find lemma: #{params[:lemma]}."

-- 
We develop, watch us RoR, in numbers too big to ignore.

Mark Reginald James wrote:
> Gene Kahn wrote:
> 
>> or passes an empty value, because the flash notice does not print any 
>> value of the lemma, thus:
>> 
>> Unable to find lemma:  .
> 
> You want:
> 
> flash.now[:notice] = "Unable to find lemma: #{params[:lemma]}."
> 
> --
> We develop, watch us RoR, in numbers too big to ignore.
Hi,
Thank you, yes, that makes sense. However it all the more confirmed that 
the controller action is not getting any value back from the Find view 
since the notice does not print any return value.
Thanks for taking the time to reply.
gk


-- 
Posted via http://www.ruby-forum.com/.

Try

def find
  p params
 ...

and look at the server output - do any parameters show up?

Also have a look at the html source generated by text_field.

Max

On 8/6/06, Gene Kahn <kublaikhan55@hotmail.com>
wrote:
> Hi,
> I have the following view:
>
>     <%= start_form_tag ( { :action => ''find'' },
:method => ''get'') %>
>       <p>
>         <%= text_field_tag :lemma, params[:lemma] %>
>       </p>
>       <%= link_to "Find It", :class => "submit"
%>
>     <%= end_form_tag %>
>
> And the following find action in the controller:
>
>   def find
>       lemma = Lemma.find_by_lemma(params[:lemma])
>       if lemma
>         redirect_to (:controller => "lemma", :action =>
"show")
>       else
>         flash.now[:notice] = "Unable to find lemma: #{lemma}."
>       end
>   end
>
> It appears that the view does not pass back any value to the controller,
> or passes an empty value, because the flash notice does not print any
> value of the lemma, thus:
>
> Unable to find lemma:  .
>
> What am I missing? Thanks for the help,
> gk
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

Max Muermann wrote:
> Try
> 
> def find
>   p params
>  ...
> 
> and look at the server output - do any parameters show up?
> 
> Also have a look at the html source generated by text_field.
> 
> Max
Down below are some relevant lines from development.log. The where 
clause for the find sql is:

(eng_lemmas."lemma" IS NULL )

Also, the url does not show the value to find (or that it is null):

[http://localhost/eng_lemma/find?class=submit]

I also added p params[:lemma] to the Find action, but the server.log is 
empty. Is that where it will send the output to?

The helper text_field is expanded as:

<p>
   <input id="lemma" name="lemma" type="text"
/>
   </p>

The values of name and type are correct.

So it does look like the view is returning nothing or something that the 
controller interprets as null. (pulling my hair)

Thanks,
gk

Processing EngLemmaController#find (for 127.0.0.1 at 2006-08-07 
01:51:17) [GET]
  Session ID: ea3ac9c50cc7a0d7bf5830462e8292ab
  Parameters: {"class"=>"submit",
"action"=>"find",
"controller"=>"eng_lemma"}
  [4;36;1mSQL (0.015000)   [0;1m SELECT a.attname, 
format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
 FROM pg_attribute a LEFT JOIN pg_attrdef d
 ON a.attrelid = d.adrelid AND a.attnum = d.adnum
 WHERE a.attrelid = ''eng_lemmas''::regclass
 AND a.attnum > 0 AND NOT a.attisdropped
 ORDER BY a.attnum

  [4;35;1mEngLemma Load (0.141000)   SELECT * FROM eng_lemmas 
WHERE (eng_lemmas."lemma" IS NULL ) LIMIT 1
Rendering  within layouts/application
Rendering eng_lemma/find
Completed in 0.17200 (5 reqs/sec) | Rendering: 0.01600 (9%) | DB: 
0.15600 (90%) | 200 OK [http://localhost/eng_lemma/find?class=submit]



-- 
Posted via http://www.ruby-forum.com/.

2006/8/6, Gene Kahn <kublaikhan55@hotmail.com>:
>
> Hi,
> I have the following view:
>
>    <%= start_form_tag ( { :action => ''find'' },
:method => ''get'') %>
>      <p>
>        <%= text_field_tag :lemma, params[:lemma] %>
>      </p>
>      <%= link_to "Find It", :class => "submit"
%>
>    <%= end_form_tag %>

i''d guess the "find it" link does NOT submit the form. try
sth like <%submit_tag(''Find It'') %> instead. should work


-- 
Michael Siebert <info@siebert-wd.de>

www.stellar-legends.de - Weltraum-Browsergame im Alpha-Stadium
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060807/69302e57/attachment.html

Michael Siebert wrote:
> 2006/8/6, Gene Kahn <kublaikhan55@hotmail.com>:
>>
>> Hi,
>> I have the following view:
>>
>>    <%= start_form_tag ( { :action => ''find'' },
:method => ''get'') %>
>>      <p>
>>        <%= text_field_tag :lemma, params[:lemma] %>
>>      </p>
>>      <%= link_to "Find It", :class =>
"submit" %>
>>    <%= end_form_tag %>
> 
> 
> i''d guess the "find it" link does NOT submit the form.
try sth like <%> submit_tag(''Find It'') %> instead.
should work
> 
> 
> --
> Michael Siebert <info@siebert-wd.de>
> 
> www.stellar-legends.de - Weltraum-Browsergame im Alpha-Stadium

That works! Strange, because in some of my other views,

link_to ... :class = "submit"

works. It''s been a struggle; I need a drink here.

Thanks for the help.
gk

-- 
Posted via http://www.ruby-forum.com/.