Rails - May 2006 - how to pull text from database and eval it?

I''m trying to add some executable code to my blog posts.  How can I
include this inside of a blog post and eval it?


Charlie bowman
http://www.recentrambles.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060523/a3536408/attachment.html

On 5/23/06, Charlie Bowman <charlie@castlebranch.com>
wrote:
>  I''m trying to add some executable code to my blog posts.  How can
I include this inside
> of a blog post and eval it?
In my controller I have a method that does this:

@content = Content.find(  :first, :conditions => [  ''active = 1 AND
action = ?'', params[:id] ] )

Then in my view I have this:

<%= render_template ''rhtml'', @content.body %>


-- 
Greg Donald
http://destiney.com/

I''m not sure I understand what you''re getting at.  Currently I
pull the
post from the database, pass it to a template and the text is displayed.
How could I embed a small block of code in that text that instead of
being displayed, it will be executed?  Forgive me if that''s what your
already showing me.

On Tue, 2006-05-23 at 09:51 -0500, Greg Donald wrote:
> On 5/23/06, Charlie Bowman <charlie@castlebranch.com> wrote:
> >  I''m trying to add some executable code to my blog posts. 
How can I include this inside
> > of a blog post and eval it?
> 
> In my controller I have a method that does this:
> 
> @content = Content.find(  :first, :conditions => [  ''active = 1
AND
> action = ?'', params[:id] ] )
> 
> Then in my view I have this:
> 
> <%= render_template ''rhtml'', @content.body %>
> 

Charlie Bowman
http://www.recentrambles.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060523/d503aa89/attachment.html

Charlie Bowman wrote:
> I''m not sure I understand what you''re getting at. 
Currently I pull the
> post from the database, pass it to a template and the text is displayed.
> How could I embed a small block of code in that text that instead of
> being displayed, it will be executed?  Forgive me if that''s what
your
> already showing me.
> 
> On Tue, 2006-05-23 at 09:51 -0500, Greg Donald wrote:
> 
>> 
>> <%= render_template ''rhtml'', @content.body %>
>> 
> 
> 
> Charlie Bowman
> http://www.recentrambles.com
Use eval:

  <%= eval(@your_code_block) %>

It''s a Ruby method that evaluates a string.

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

what if I"m only evaling part of the blog post.  Would I need to store
the executable code in a seperate field?  I wouldn''t want to eval the
entire post.

On Tue, 2006-05-23 at 17:37 +0200, Simen wrote:
> Charlie Bowman wrote:
> > I''m not sure I understand what you''re getting at. 
Currently I pull the
> > post from the database, pass it to a template and the text is
displayed.
> > How could I embed a small block of code in that text that instead of
> > being displayed, it will be executed?  Forgive me if that''s
what your
> > already showing me.
> > 
> > On Tue, 2006-05-23 at 09:51 -0500, Greg Donald wrote:
> > 
> >> 
> >> <%= render_template ''rhtml'', @content.body
%>
> >> 
> > 
> > 
> > Charlie Bowman
> > http://www.recentrambles.com
> 
> Use eval:
> 
>   <%= eval(@your_code_block) %>
> 
> It''s a Ruby method that evaluates a string.

Charlie Bowman
http://www.recentrambles.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060523/14196fba/attachment.html

On 5/23/06, Charlie Bowman <charlie@castlebranch.com>
wrote:
>  I''m not sure I understand what you''re getting at. 
Currently I pull the post from
> the database, pass it to a template and the text is displayed.  How could I
embed a
> small block of code in that text that instead of being displayed, it will
be executed?
> Forgive me if that''s what your already showing me.
render_template will evaluate any embedded code you include.


-- 
Greg Donald
http://destiney.com/

First put all the Ruby code that shall be executable into a tag:
<ruby>
list = [1, 2, 3]
list.each do |one|
print one
end
</ruby>

So use a simple regex:
@blog.content = @blog.content.gsub(/\<ruby\>(.*?)\<\/ruby\>/) do
|match|
match = eval($1)
end

--

Judofyr

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

Thanks, that will work perfectly!  So simple, it went right over my
head!


On Tue, 2006-05-23 at 18:22 +0200, Magnus Holm wrote:
> First put all the Ruby code that shall be executable into a tag:
> <ruby>
> list = [1, 2, 3]
> list.each do |one|
> print one
> end
> </ruby>
> 
> So use a simple regex:
> @blog.content = @blog.content.gsub(/\<ruby\>(.*?)\<\/ruby\>/)
do |match|
> match = eval($1)
> end
> 
> --
> 
> Judofyr

Charlie Bowman
http://www.recentrambles.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060523/75e48946/attachment.html