Hi, I have a model called Stock with a value called "strength." I
wrote a simple method in the Stock.rb model file to update the value
of "strength" for each record in the stocks table. I created a
controller called fix_controller.rb. I don't have access to the live
system, so the idea is that an admin will go to http://url/fix and a
script will run to check and potentially update the "strength" value
for every record in the stocks table.
fix_controller.rb
^^^^^^^^^^^^^^^
class FixController < ApplicationController
def index
stocks = Stock.find(:all)
stocks.each do |s|
if s.strength.nil? || s.strength == ''
puts 'nothing to update'
else
s.update_units
end
end
end
end
Stock.rb
^^^^^^^^^
def update_units
if self.strength == '' || self.strength.nil?
puts 'nil - cannot update'
elsif self.strength != '' && self.strength != nil
self.strength = self.strength.gsub!(' ml', 'ml') if
self.strength.gsub!(' ml', 'ml') != nil
self.strength = self.strength.gsub!(' mL', 'ml') if
self.strength.gsub!(' mL', 'ml') != nil
self.strength = self.strength.gsub!(' g', 'g') if self.strength.gsub!
(' g', 'g') != nil
self.strength = self.strength.gsub!(' oz', 'oz') if
self.strength.gsub!(' oz', 'oz') != nil
self.strength = self.strength.gsub!(' mg', 'mg') if
self.strength.gsub!(' mg', 'mg') != nil
end
When I try to run this, I always get the error:
NoMethodError: private method `gsub' called for nil:NilClass
I'm sure this is a simple error and/or I'm not going about this the
correct way. I really only need to run this code once... Any idea why
I'm getting that error? I'm checking for nil...
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