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jonathan Mcintire

2008-Jan-17 20:03 UTC

Trying to put ruby code in an if then statement in .rhtml

This code, in my view(.rhtml file) causes the error
which I''ll post below.

-----The Code-----
<%= if (@announcement.image == nil) then

<a href = "<%= url_for_file_column(''announcement'',
''image'') %>" >Download</a>

end %>


----The Error----
compile error
./script/../config/../app/views/committee/audit_archive.rhtml:118:
syntax error
           <a href =
"<%url_for_file_column(''announcement'',
''image'') ).to_s);
_erbout.concat "\" >Download</a>\n"




Any ideas on the cause of this?  Thanks for any and
all help!




     
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Robert Walker

2008-Jan-17 20:32 UTC

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Re: Trying to put ruby code in an if then statement in .rhtml

Use <% if... Not <%= if...

On Jan 17, 3:03 pm, jonathan Mcintire
<hatejo...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>
wrote:> This code, in my view(.rhtml file) causes the error
> which I''ll post below.
>
> -----The Code-----
> <%= if (@announcement.image == nil) then
>
> <a href = "<%=
url_for_file_column(''announcement'',
> ''image'') %>" >Download</a>
>
> end %>
>
> ----The Error----
> compile error
> ./script/../config/../app/views/committee/audit_archive.rhtml:118:
> syntax error
>            <a href = "<%>
url_for_file_column(''announcement'', ''image'')
).to_s);
> _erbout.concat "\" >Download</a>\n"
>
> Any ideas on the cause of this?  Thanks for any and
> all help!
>
>      
___________________________________________________________________________
_________
> Be a better friend, newshound, and
> know-it-all with Yahoo! Mobile.  Try it now.
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Robert Walker

2008-Jan-17 20:40 UTC

head link

Re: Trying to put ruby code in an if then statement in .rhtml

<% if condition %>

<% else %>

<% end %>

Inside each part use normal ERB tags and HTML.

On Jan 17, 3:32 pm, Robert Walker
<rwalker...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Use <% if... Not <%= if...
>
> On Jan 17, 3:03 pm, jonathan Mcintire
<hatejo...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
>
> > This code, in my view(.rhtml file) causes the error
> > which I''ll post below.
>
> > -----The Code-----
> > <%= if (@announcement.image == nil) then
>
> > <a href = "<%=
url_for_file_column(''announcement'',
> > ''image'') %>" >Download</a>
>
> > end %>
>
> > ----The Error----
> > compile error
> > ./script/../config/../app/views/committee/audit_archive.rhtml:118:
> > syntax error
> >            <a href = "<%> >
url_for_file_column(''announcement'', ''image'')
).to_s);
> > _erbout.concat "\" >Download</a>\n"
>
> > Any ideas on the cause of this?  Thanks for any and
> > all help!
>
> >      
___________________________________________________________________________
_________
> > Be a better friend, newshound, and
> > know-it-all with Yahoo! Mobile.  Try it now.
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jonathan Mcintire

2008-Jan-17 20:43 UTC

head link

Re: Trying to put ruby code in an if then statement in .rhtml

No luck! 

The problem seems to be with the <a href part of the
code.

--- Robert Walker <rwalker348-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> 
> Use <% if... Not <%= if...
> 
> On Jan 17, 3:03 pm, jonathan Mcintire
> <hatejo...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
> > This code, in my view(.rhtml file) causes the
> error
> > which I''ll post below.
> >
> > -----The Code-----
> > <%= if (@announcement.image == nil) then
> >
> > <a href = "<%=
url_for_file_column(''announcement'',
> > ''image'') %>" >Download</a>
> >
> > end %>
> >
> > ----The Error----
> > compile error
> >
>
./script/../config/../app/views/committee/audit_archive.rhtml:118:> > syntax error
> >            <a href = "<%> >
url_for_file_column(''announcement'', ''image'')
> ).to_s);
> > _erbout.concat "\" >Download</a>\n"
> >
> > Any ideas on the cause of this?  Thanks for any
> and
> > all help!
> >
> >      
>
___________________________________________________________________________> _________
> > Be a better friend, newshound, and
> > know-it-all with Yahoo! Mobile.  Try it now.
> 
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ>
> 
> 




     
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Sven Schwyn

2008-Jan-17 20:44 UTC

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Re: Trying to put ruby code in an if then statement in .rhtm

> <%= if (@announcement.image == nil) then
<% if @announcement.image.nil? %>
...
<% end %>

Ruby ain''t PHP :-)
-- 
Posted via http://www.ruby-forum.com/.

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jonathan Mcintire

2008-Jan-17 20:49 UTC

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Re: Trying to put ruby code in an if then statement in .rhtm

Both work, but for the sake of RUBY I probably should
write it like this. Thanks.


--- Sven Schwyn
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> 
> > <%= if (@announcement.image == nil) then
> 
> <% if @announcement.image.nil? %>
> ...
> <% end %>
> 
> Ruby ain''t PHP :-)
> -- 
> Posted via http://www.ruby-forum.com/.
> 
>
> 
> 




     
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David A. Black

2008-Jan-17 20:54 UTC

head link

Re: Trying to put ruby code in an if then statement in .rhtml

Hi --

On Thu, 17 Jan 2008, jonathan Mcintire wrote:
>
> This code, in my view(.rhtml file) causes the error
> which I''ll post below.
>
> -----The Code-----
> <%= if (@announcement.image == nil) then
>
> <a href = "<%=
url_for_file_column(''announcement'',
> ''image'') %>" >Download</a>
>
> end %>
See other replies for the right technique. One comment I''ll make is to
note in particular that ERb delimiters are not reentrant. To insert a
string conditionally, you could do something like this:

   <%= "<a
href=#{url_for_file_column(''announcement'',''image)}"
if
       @announcement.image.nil %>

and if the "if" fails, the whole expression will be nil, which will be
interpolated as an empty string. It''s not generally the best way to do
it, though; the separate <% if %> ... <% end %> things are better,
because they''re easier to parse visually and also they don''t
interpolate anything, not even an empty string. Also, the if-modifier
is fragile; it won''t be happy if you break the line before it. I would
mainly use the above technique for short things like:

   <%= @user.middle_name %>

where I can go ahead and do the interpolation without really caring
whether the value is nil or not (or "" for that matter). Except what
I''d really do is write a User#whole_name method :-) But you see the
point.

David

-- 
Training for 2008!
Ruby on Rails training by David A. Black/Ruby Power and Light, LLC:
    * Intro to Rails, New York, NY, February 4-7 2008
    * Advancing With Rails, New York, NY, February 11-14 2008
Hosted by Exceed Education. See http://www.rubypal.com for details!

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Jeremy Weiskotten

2008-Jan-17 20:54 UTC

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Re: Trying to put ruby code in an if then statement in .rhtm

Try this...


<% if @announcement.image.nil? %>
<%= link_to ''Download'',
url_for_file_column(''announcement'', ''image'')
%>
<% end %>
-- 
Posted via http://www.ruby-forum.com/.

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jonathan Mcintire

2008-Jan-17 21:01 UTC

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Re: Trying to put ruby code in an if then statement in .rhtm

This did it!
Thanks for responding everyone.


--- Jeremy Weiskotten
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:
> 
> Try this...
> 
> 
> <% if @announcement.image.nil? %>
> <%= link_to ''Download'',
> url_for_file_column(''announcement'',
''image'') %>
> <% end %>
> -- 
> Posted via http://www.ruby-forum.com/.
> 
>
> 
> 




     
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Rails - Jan 2008 - Trying to put ruby code in an if then statement in .rhtml

Trying to put ruby code in an if then statement in .rhtml

Re: Trying to put ruby code in an if then statement in .rhtml

Re: Trying to put ruby code in an if then statement in .rhtml

Re: Trying to put ruby code in an if then statement in .rhtml

Re: Trying to put ruby code in an if then statement in .rhtm

Re: Trying to put ruby code in an if then statement in .rhtm

Re: Trying to put ruby code in an if then statement in .rhtml

Re: Trying to put ruby code in an if then statement in .rhtm

Re: Trying to put ruby code in an if then statement in .rhtm