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2008 Jul 23
3
Validation method vs. After Save & Rollback
...> find the total share company = Company.find(company_id) company_total_share = company.total_share # => This is summing the old value if changed? if changes["share"] # => Changes to a model are stored in the changes array on the instance, the array has 2 value ["from_value", "to_value"] old_value = changes["share"][0].to_f # => Convert To Float new_value = changes["share"][1].to_f new_total_share = company_total_share - old_value + new_value new_total_share > 100.01 else false # validation...