Ajax & Rails

Rails
1

ok - I am trying to do something seemingly straight forward.
Essentially I want to list out a bunch of items and for each item
individually, if the user clicks on it, the corresponding web link
will appear underneath – if the user clicks on the item again, then
the weblink disappears. This should work for each item in the list.
I have tried but to no avail - below is a vid clip of what is
happening as well as the code that I am using – any help is greatly
appreciated

http://www.screentoaster.com/watch/stU0 … BeQlVeXV5e

(partial _post.html.erb)

<%= link_to_remote("#{post.title}", :after => "$('link').next (1).toggle()") %>

<%= post.link %>
2

ok - so I changed the code to the below and getting similar results.
What I think is happening is that because it is a partial that is
being called (in this example 3 times) but the div is static, it is
only updating the first one (i.e. div 1). Is there a way to make a
dynamic div? New code below…

<%= link_to_function post.title, “Element.toggle(‘div 1’)” %>

<%= post.link %>

On Apr 8, 3:23 am, Frederick C. [email protected]

3

never mind - figured it out - the issue was in the div (and made them
dynamic through below)…works – thanks!

<%= link_to_function post.title, "Element.toggle('#{post.title}')" %>

<%= post.link %>
4

On Apr 8, 5:45 am, esdevs [email protected] wrote:

ok - I am trying to do something seemingly straight forward.
Essentially I want to list out a bunch of items and for each item
individually, if the user clicks on it, the corresponding web link
will appear underneath – if the user clicks on the item again, then
the weblink disappears. This should work for each item in the list.
I have tried but to no avail - below is a vid clip of what is
happening as well as the code that I am using – any help is greatly
appreciated

Well by the looks of things you have multiple divs with the same id
(never a good) idea, you’re using link_to_remote but not actually
making an ajax call (link_to_function might be more appropriate) and
if my memory is correct and you want to select that link, next()
selects siblings whereas it looks like you want to select children
(which is what down does)

Fred

5

esdevs wrote:

never mind - figured it out - the issue was in the div (and made them
dynamic through below)…works – thanks!

<%= link_to_function post.title, "Element.toggle('#{post.title}')" %>

<%= post.link %>

Just make sure that <%= post.title %> is unique for the page.

Also note that a cleaner solution (assuming “post” is an ActiveRecord
subclass) is to use div_for since it will automatically generate a
unique id for your div representing your post:

http://www.railsbrain.com/api/rails-2.3.2/doc/index.html?a=M002465&name=div_for

6

2009/4/9 Phlip [email protected]

code that goes far beyond “browser forgiveness”.

Just to complicate things, it was recommended in the past not to use
underscores for id and class names because of the css specs.
http://devedge-temp.mozilla.org/viewsource/2001/css-underscores/
I don’t think it’s a problem these days but I started to hyphenate in
place
of underscoring because I noticed my syntax highlighter didn’t like
underscores which led me to this whole weird issue.

–
Daniel B.

http://blog.web17.com.au

7

Just make sure that <%= post.title %> is unique for the page.

An id must conform to roughly the same rules as a JavaScript identifier.
No
leading numbers, no spaces, no funny business. Of course no browser
bothers to
enforce that, but such rules exist to help us Rails programmers write
rigorous
code that goes far beyond “browser forgiveness”.

8

On 8 Apr 2009, at 15:31, Phlip wrote:

write rigorous
code that goes far beyond “browser forgiveness”.

Or use the div_for helper

Fred

9

Brilliant on all accounts - thanks guys!!

sean

On Apr 8, 11:04 am, Frederick C. [email protected]

10

Frederick C. wrote:

Or use the div_for helper

(Didn’t know that! But…) sometimes it ain’t a div. you can twiddle the
innards
of a span or table or li. Not to say you should…