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meskallito/gist:5288591020f64259a4e3

Created June 9, 2014 21:37
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Inserting of custom diff logic
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gistfile1.rb
class AlterDiffLogicForInvoiceCharges < ActiveRecord::Migration
def change
alter_diff_calculations :invoice_charges, %{
excluded_cols := array_cat(excluded_cols,'{user_id, properties}'::text[]);
changes = ((hstore(NEW.*) - hstore(OLD.*)) - excluded_cols) || (hstore(NEW.properties) - hstore(OLD.properties));
}
end
end
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