Conditional link_to_remote not re-rendering

Rails
1

I have an int, ‘floorfrozen,’ in my table, ‘channels’ that can take a
value of 0 or 1.

When I render a page, an image in a link_to_remote is called
differently depending what the value of channel.floorfrozen is, in a
partial, as follows:

<% if @channel.floorfrozen %>
<%= link_to_remote image_tag("/images/icecube.gif"), {:url =>
{:controller => ‘channels’,:action => ‘freezer’}},:title => ‘Unfreeze
the floor’, :type => “submit”,:style => “float: right; border-style:
groove; padding: 1px;” %>
<% else %>
<%= link_to_remote image_tag("/images/icecube.gif"), {:url =>
{:controller => ‘channels’,:action => ‘freezer’}},:title => ‘Freeze
the floor’, :type => “submit”,:style => “float: right; border-style:
ridge; padding: 1px;” %>
<% end %>

The problem is that the image remains the same! The functionality of
what is occuring in the the controller action, channel.freezer, is
correct, but the link_to_remote never rerenders UNLESS I refresh the
page. Can somene tell me why this is and how I can fix it so that my
page renders properly? Thanks, Janna B.

def freezer
if @channel.floorfrozen == 0
@channel.update_attributes(:floorfrozen => 1)
@channel.floorfrozen = 1
else
@channel.update_attributes(:floorfrozen => 0)
@channel.floorfrozen = 0
end
render :action => ‘display’
end

2

I’m stumped here – well aware that link_to_remote is intended to do
something other than what I am trying to use it for. You see, I need
to create a sort of button, that takes an image and that has different
looks (css styles, depending upon the state of a variable), that works
without rendering a page.

God. Does anyone know any way I can accomplish this? It SEEMS like it
is easiest solved as a rails solution because of the Ajax helpers
inherint in Rails – but I am open to anything! -Janna B

3

On Jul 11, 5:09 am, JannaB [email protected] wrote:

I’m stumped here – well aware that link_to_remote is intended to do
something other than what I am trying to use it for. You see, I need
to create a sort of button, that takes an image and that has different
looks (css styles, depending upon the state of a variable), that works
without rendering a page.

Well you’re calling render in your action but you haven’t told
link_to_remote what it should do with the html that is rendered so it
just dumps it on the floor. (Have a look at link_to_remote’s :update
option)

Fred

4

Fred, I put the whole div with the link_to_remote’s in it’s own
partial:

<% if @channel.floorfrozen != 0 %> <%= link_to_remote image_tag("/images/icecube.gif"), {:url => {:controller => 'channels',:action => 'freezer', :update => 'buttonrak1'}},:title => 'Unfreeze the floor', :type => "submit",:style => "float: right; border-style: groove; padding: 1px;" %> <% else %> <%= link_to_remote image_tag("/images/icecube.gif"), {:url => {:controller => 'channels',:action => 'freezer', :update => 'buttonrak1'}},:title => 'Freeze the floor', :type => "submit",:style => "float: right; border-style: ridge; padding: 1px;" %> <% end %>

Then, in my controller, I re-render the partial (i.e. the div with the
link_to_remotes):

def freezer
###blah blah
render :partial => ‘brack1partial’
end

5

On Jul 11, 3:56 pm, JannaB [email protected] wrote:

Fred, I put the whole div with the link_to_remote’s in it’s own
partial:

<% if @channel.floorfrozen != 0 %> <%= link_to_remote image_tag("/images/icecube.gif"), {:url => {:controller => 'channels',:action => 'freezer', :update => 'buttonrak1'}},:title => 'Unfreeze the floor', :type => "submit",:style => "float: right; border-style: groove; padding: 1px;"

You’ve put the update in the hash of url options, which you shouldn’t
do.
It should be link_to_remote ‘blah’, {:url => {…}, :update =>
“…”}, html_options

Fred

6

[Do not hit {tab} while attempting to post!]

…continuing, the point is, it does NOT rerender that partial / div
even though the controller code is being executed properly. Isn;t this
the way I should do something though for link_to_remote when what I
want to update contains the html portion that calls it? -Janna B

7

You know…your sharing of your knowledge on here…I can read all
day long on Ruby, and I can write code all day long – but when you
(and a few others on this list as well) point out what should be
obvious (errors) to me, it REALLY sinks in, and my understanding of
this grows exponentially, and I am obligated in the future to
contribute to others questions as my knowledge level increases.

I really cannot thank you – and the others here who help, enough. -
Janna B