Rails: Helper function not found in view

Question

I'm following the instructions at: http://agilewebdevelopment.com/plugins/acts_as_taggable_on_steroids to add the tag cloud to my view:

in the controller:

class PostController < ApplicationController
   def tag_cloud
      @tags = Post.tag_counts
   end
end

I also added the tag_cloud method as a helper method in the controller

and in the view:

<% tag_cloud @tags, %w(css1 css2 css3 css4) do |tag, css_class| %>                   (line 1)
  <%= link_to tag.name, { :action => :tag, :id => tag.name }, :class => css_class %> (line2)
<% end %> (line 3)

However:

1) if I don't add the helper_method :tag_cloud in the controller I get a undefined method error for tag_cloud

2) if I do add the helper method I get: wrong number of arguments (2 for 0) on the same line 1 of my sample code above.

Suggestions?

SOLUTION I ended up not doing what I had as example code in the view.

Instead I did this:

<% @post.tags.each do |tag| %>
    <%= link_to( tag.name,tag,:class => "tag_cloud_item_link") %>
<% end %>

theIV · Accepted Answer · 2010-05-22 21:52:35Z

2

1.

Methods defined in the controller are not accessible to views unless you add (as you mention) the helper_method call.

2.

Your method tag_cloud that you've defined as a helper in your controller doesn't take any parameters, but you are trying to call tag_cloud with @tags, %w(css1...), & a block.

Your tag_cloud method will return an @tags instance variable and that's it.

From the post you've provided that you are working off of, did you include TagsHelper in your ApplicationHelper? I'm guessing that this defines a tag_cloud helper method that will accept the params that you are trying to pass in.

answered May 22, 2010 at 21:52

theIV

25.9k5 gold badges56 silver badges59 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

theIV Over a year ago

Is everything else "working properly"? This seems like either a conflict of some sort or the plugin is not being loaded properly. Have you restarted your app since you installed the plugin (I know it sounds silly). Could you paste your full error?

cbrulak Over a year ago

reload and other things are working properly. I found a work around by using @tags = tag_cloud, then @tags.each. i will post more code & errors in a bit, thanks

thoughtpunch · Accepted Answer · 2010-11-18 03:22:07Z

1

I'm having the same issue. Just like the OP, Moving the "tag_cloud" helper method to the TagHelper seemed to get rid of some issue, but creates the "wrong number of arguments" error in the process.

cbrulak said he found a work arround. Can you update us and possibly send a PM to the "Acts-as-taggable-on" authors at https://github.com/mbleigh/acts-as-taggable-on

answered Nov 18, 2010 at 3:22

thoughtpunch

1,9475 gold badges25 silver badges42 bronze badges

Comments

Dharman · Accepted Answer · 2020-10-23 16:57:40Z

1

I arrived here because I wanted to define a method to use in the view. The simple answer was that it should have been defined in the model (e.g. conversation.rb file), and not in the helper.

edited Oct 23, 2020 at 16:57

Dharman♦

33.9k27 gold badges106 silver badges157 bronze badges

answered Oct 23, 2020 at 16:52

stevec

55.3k52 gold badges315 silver badges436 bronze badges

Collectives™ on Stack Overflow

Rails: Helper function not found in view

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related