what is the maximum number for a ruby big decimal in rails?

Question

My RoR is currently giving me some problems for Bigdecimal records.

my code is to update certain attribute with:

 BigDecimal.new((income*scale).to_s)

For example there is a form that I scanned and its value is

 11210000000.0

when i print the bigdecimal it looks like:

 #<BigDecimal:91e2284,'0.1121E11',18(27)>

when i look the record in mySQL db the record appears with

  Income: 9999999999

all the records with income less than 10 billion do not have this problem.

What is going on?

Answer 1

I think (because I can't find it in the docs but I know it's the case for Integer) that BigDecimal has no MAX value in Ruby. Unfortunately all database systems have those limits so you may wish to store big numbers as strings in the database.

Answer 2

wrote this in the terminal:

 rails g migration change_income_format_in_my_table

then set the migration file as:

class ChangeIncomeFormatInMyTable < ActiveRecord::Migration
 def up
change_table :forms do |t|
  t.change :income, :decimal, :precision => 16, :scale => 2
end
 end

 def down
    change_table :forms do |t|
     t.change :income, :decimal
   end
 end
  end

then typed

rake db:migrate

thanks house9