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I want to provide csv links in a view and I placed the csv generating code in ApplicationHelper. However I'm getting this error:
undefined method `send_data' for #<#<Class:0x0000010151c708>:0x0000010151a070> referencing this:
send_data content, :type => "text/plain", :filename => filename, :disposition => 'attachment' If I place the csv code in a controller it works fine. I was hoping to use the helper to avoid having to define routes for every controller I want to provide csv options for (I have a bunch). How can I make send_data (and other necessary methods) available to the helper?
287
In the first version, you can just use html_format - you only need MyHelper. html_format in the second. This does not work when the helper method you want to use make use of view methods such as link_to . Controllers don't have access to these methods and most of my helpers use these methods.
It's possible, although not very common, to use helper methods from controller actions. Before Rails 5, you had to include the helper module. In newer versions, you can use helpers in your controller with the helpers (plural) object.
helper_method.By default, methods in ApplicationController are only accessible inside the Controllers.
Add a method to the ApplicationController and expose it as a helper method with helper_method:
class ApplicationController < ActionController::Base helper_method :foo def foo "bar" end end Now the foo method is accessible to both Controllers and Views.
83
If the issue is to make methods in ApplicationHelper available in all controllers, why not add a line
include ApplicationHelper
to the ApplicationController file?
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