Rails - Jun 2006 - If / Else Form layout question.

Hello all,

I''m using the following _form.rhtml layout for a number of pages, 
including edit record and new record (which each has it''s own
definition
in the controller).

I''d like to display a different author form field depending on which 
page they are using. I''d rather keep using _form.rhtml as a layout 
template, instead of customizing each separate page.

How do I go about setting up the if statement? Is there such a thing as 
a ''if action => new'' or ''if action =>
edit'' statement?

Thanks.


<p><label
for="article_title">Title</label><br/>
<%= text_field ''article'', ''title'' 
%></p>

<p><label for="article_body">Body</label><br/>
<%= text_area ''article'', ''body'' 
%></p>

<p><label
for="article_author">Author</label><br/>
<%
if ??????

#if new record page, insert the logged in users name
    text_field ''article'', ''author'',
''value'' => @username.name,
''disabled'' => ''disabled''

else

#if existing record to edit page, just display the name already in 
database.
    text_field ''article'', ''author''

end

%></p>

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> How do I go about setting up the if statement? Is there such a thing as 
> a ''if action => new'' or ''if action =>
edit'' statement?
The controller variable @action_name should contain the current action.

Steve

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Stephen Bartholomew wrote:
>> How do I go about setting up the if statement? Is there such a thing as
>> a ''if action => new'' or ''if action =>
edit'' statement?
> The controller variable @action_name should contain the current action.
> 
> Steve
or params[:action] params[:controller] etc

jeff

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Hi Stephen,

Stephen Bartholomew wrote:

There are two parts to your question.
> How do I go about setting up the if statement?
This is the easy part.

<% if @action_name == ''one_thing'' %>
... do that stuff
<% else %>
... do other stuff
<% end %>
> Is there such a thing as a ''if action => new'' or
> ''if action => edit'' statement?  The controller
variable
> @action_name should contain the current action.
This is more difficult, not to do, but to understand what you''re trying
to
do.  The page rendered by the view is sitting there on the visitor''s
desktop
waiting for that visitor to take some action.  The visitor''s action
(e.g.,
clicking on a link or a button) can determine what message (i.e., what 
controller / action pair) is sent to the server.  You can use an if-else to 
present different buttons, for example, depending on the value of some 
variable.  That would look like...

<% if @action_name == ''one_thing'' %>
  <%= button_to(:controller => ''your_first_choice'',
:action =>''something'')
%>
<% else %>
  <%= button_to(:controller => ''your_other_choice'',
:action =>''else'') %>
<% end %>

hth,
Bill

Hi Jon,

I really shouldn''t do email before my second cup.  (Sorry about that 
Stephen. ;-) )

Jon Hadley wrote:
> I''d like to display a different author form field depending on
which
> page they are using. I''d rather keep using _form.rhtml as a layout
> template, instead of customizing each separate page.
If you surround your form field with an if statement, it will only be 
rendered if the statement succeeds.

<% if @author_name == ''bob'' %>
  <%= text_field_tag(''field_for_bob'') %>
<% elsif @author_name == ''sam'' %>
  <%= text_field_tag(''field_for_sam'') %>
<% elsif @author_name == ''sally'' %>
  <%= text_field_tag(''field_for_sam'') %>
<% else %>
  <%= text_field_tag(''standard_field'') %>
<% end %>

hth,
Bill

> I really shouldn''t do email before my second cup.  (Sorry about
that
> Stephen. ;-) )
You may need another - my post was a response to the original question 
:0D

Steve

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