Undefined Method in Rails even though the method exist - ruby-on-rails

Question

I have a method in my view helper directory that I am trying to use within a model but i keep getting a undefined method error. I cannot figure out what i am doing wrong.This is my module.
module StbHelper
def gen_csv(stbs)
CSV.generate do |csv|
csv << [
'param1',
'param2'
]
stbs.each do |stb|
health_check = stb.stb_health_checks.last
csv << [
'value1',
'value2'
]
end
end
end
This is the class i want to use the method in.
require 'stb_helper'
class Stb < ActiveRecord::Base
def self.get_notes_data
.
.
.
end
def self.update
.
.
.
end
def self.report(options={})
csv_file = nil
if options == {}
########################################
# This is the line that throws the error
csv_file = StbHelper.gen_csv(Stb.all)
#######################################
else
stbs = []
customers = List.where(id: options[:list])[0].customers
customers.each do |customer|
customer.accounts.each do |account|
stbs += account.stbs
end
end
csv_file = StbHelper.gen_csv(stbs)
end
end
end

Answer 1

You've defined a module, that doesn't require instantiation. You should be able to use it without the StbHelper part (as long as you require the module in the document):
def self.report(options={})
csv_file = nil
if options == {}
########################################
# This is the line that throws the error
csv_file = gen_csv(Stb.all)
#######################################
else
stbs = []
customers = List.where(id: options[:list])[0].customers
customers.each do |customer|
customer.accounts.each do |account|
stbs += account.stbs
end
end
csv_file = gen_csv(stbs)
end
end
But you shouldn't use a helper for this, you can create a normal module and require it the same way.
Edit: Save the module in a new folder called app/modules (and restart the server), save a file called stb_helper.rb with the contents of your module:
module StbHelper
def gen_csv(stbs)
CSV.generate do |csv|
csv << [
'param1',
'param2'
]
stbs.each do |stb|
health_check = stb.stb_health_checks.last
csv << [
'value1',
'value2'
]
end
end
end