Can't convert Range in to Integer (Ruby on Rails) - ruby

Question

I am using Ruby (1.9.3) and Rails (3.2.2). I have tasks file which contains a bunch of fake data to be populated to my database.
Here is some part of the task that I believe is causing the problem
#Create random Tender and populate the db
20.times do |n|
title = "#{Faker::Company.bs()} tender "
company_name = Faker::Company.name
opening_date=Time.at(rand * Time.now.to_i)
closing_date=Time.at(opening_date + ( 8*7*24*60*60)) #add 8 weeks to the deadline
bid_amount= rand(10000..100000)
description=Faker::Lorem.paragraph(sentence_count = 3)
Tender.create!(title: title,
company_name: company_name,
opening_date: opening_date,
closing_date: closing_date,
bid_amount: bid_amount ,
bid_amount: bid_amount ,
description: description )
end
It works fine with dev but only the above part is not executed on production database. I am using gem 'sqlite3', '1.3.5' on dev. and
gem 'pg', '0.12.2' on production (heroku)
When I run
git push heroku
$ heroku pg:reset SHARED_DATABASE --confirm myapp
$ heroku run rake db:migrate
$ heroku run rake db:populate
db:populate throws an error that says **can't covert Range to Integer.**
Any ideas what the problem might be?
EDIT: The data type of bid_amount is decimal

Answer 1

Your production ruby version is not 1.9.3. It is probably 1.8.7
$ ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [universal-darwin11.0]
$ irb
>> rand(10000..100000)
TypeError: can't convert Range into Integer
from (irb):1:in `rand'
from (irb):1
>> exit
$ rvm use 1.9.3
Using /Users/chirantan/.rvm/gems/ruby-1.9.3-p0
$ irb
1.9.3p0 :001 > rand(10000..100000)
=> 37036
Install ruby 1.9.3 on production and the rand method should work as expected.