Code Cleaning

Rails
1

Hi there,

I’m kind of a newbie on RoR and on this group and I was wondering if
someone could help to clean this bit of code:

<%= link_to_remote (image_tag(“hide.png”, :size=>“16x16”),
:url=>"/message/#{message.id}/hide",
:method=>“post”,
:before=>“Effect.Fade(this.parentNode.parentNode, {duration:
0.5});
Effect.BlindUp(this.parentNode.parentNode, {duration:
0.5})”)
%>
<%= link_to_remote (image_tag(“top.png”, :size=>“16x16”),
:url=>"/message/#{message.id}/top",
:method=>“post”,
:before=>“Effect.Fade(this.parentNode.parentNode, {duration:
0.5});
Effect.BlindUp(this.parentNode.parentNode, {duration:
0.5})”)
%>
<%= link_to_remote (image_tag(“bottom.png”, :size=>“16x16”),
:url=>"/message/#{message.id}/bottom",
:method=>“post”,
:before=>“Effect.Fade(this.parentNode.parentNode, {duration:
0.5});
Effect.BlindUp(this.parentNode.parentNode, {duration:
0.5})”)
%>

As you can see I have some kind of options that do repeat themselves.
My idea was to find a way to describe them for once and use them
repeatedly.
Any thoughts on how to achieve this,

Thanks in advance,

Christophe

2

I’m kind of a newbie on RoR and on this group and I was wondering if
someone could help to clean this bit of code:

How about something as simple as:

<% for image_filename in [“hide.png”, “top.png”, “bottom.png”] %>
<%= link_to_remote (image_tag(image_filename, :size=>“16x16”),
:url=>"/message/#{message.id
}/hide",
:method=>“post”,

:before=>"Effect.Fade(this.parentNode.parentNode, {duration:
0.5});

Effect.BlindUp(this.parentNode.parentNode, {duration: 0.5})")
%>
<% end %>

Alternatively, make a helper method and call that each time.

Cheers,

Andy

3

Thanks,
That’s a good start.

Any advice where to start looking for how to make a helper method ?

4

On 9 March 2010 13:30, Christophe D.
[email protected]wrote:

Thanks,
That’s a good start.

Any advice where to start looking for how to make a helper method ?

I’d recommend Agile Web D. with Rails (Pragmatic Programmers
book).
I looked online but couldn’t see a lot that was easy to learn from.

Basically a helper method is a method that is available in your views
and
(can be) used for generating markup that would be repetitive otherwise.

For example you could have something this:

application_helper.rb:
module ApplicationHelper
def christophe_link_action(image_filename)
link_to_remote (image_tag(image_filename, :size=>“16x16”),

                                           :url=>"/message/#{message.id

}/hide",
:method=>“post”,

:before=>"Effect.Fade(this.parentNode.parentNode, {duration:
0.5});

Effect.BlindUp(this.parentNode.parentNode, {duration: 0.5})")

end
end

Then in your view just do:

<%= christophe_link_action(“foo.png”) %>
<%= christophe_link_action(“bar.png”) %>

Does that make things any clearer? If not, I’d recommend the book I
mentioned earlier (or post back with questions).

Cheers,

Andy

5

Thanks,
This is good concise explanation.
I do have the book you suggests, but haven’t had the time to go deep
enough in it.
Furthermore, I went back to it to check what it says about helper
creation, but didn’t quite understood

Cheers,
Christophe
Le 9 mars 2010 à 15:08, Andy J. a écrit :

6

Only thing to note it that the :url parameter changes on each line (it
does
not always end with ‘hide’!)

The fact that it is the same as the image name should be treated as an
unfortunate coincidence. The christophe_link_action() method should take
two
parameters, one for the image file name and one for the url (or at least
the
last part of it).

7

Agreed. I didn’t notice that in the OP’s code.

Cheers,

Andy

–
Andy J.
http://andyjeffries.co.uk/ #rubyonrails #mysql #jquery
Registered address: 64 Sish Lane, Stevenage, Herts, SG1 3LS
Company number: 5452840

8

Christophe wrote:

Hi there,

I’m kind of a newbie on RoR and on this group and I was wondering if
someone could help to clean this bit of code:

<%= link_to_remote (image_tag(“hide.png”, :size=>“16x16”),
:url=>“/message/#{message.id}/hide”,
:method=>“post”,
:before=>“Effect.Fade(this.parentNode.parentNode, {duration:
0.5});
Effect.BlindUp(this.parentNode.parentNode, {duration:
0.5})”)
%>
<%= link_to_remote (image_tag(“top.png”, :size=>“16x16”),
:url=>“/message/#{message.id}/top”,
:method=>“post”,
:before=>“Effect.Fade(this.parentNode.parentNode, {duration:
0.5});
Effect.BlindUp(this.parentNode.parentNode, {duration:
0.5})”)
%>
<%= link_to_remote (image_tag(“bottom.png”, :size=>“16x16”),
:url=>“/message/#{message.id}/bottom”,
:method=>“post”,
:before=>“Effect.Fade(this.parentNode.parentNode, {duration:
0.5});
Effect.BlindUp(this.parentNode.parentNode, {duration:
0.5})”)
%>

As you can see I have some kind of options that do repeat themselves.
My idea was to find a way to describe them for once and use them
repeatedly.
Any thoughts on how to achieve this,

Well, one thing to do: take the JavaScript out of your ERb files and put
it in a separate JavaScript file. This has many advantages, among them
the fact that it’s easier to reduce repetition.

Thanks in advance,

Christophe

Best,

Marnen Laibow-Koser
http://www.marnen.org
[email protected]