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Ruby ActiveRecord Basics AR Extensions Stateful Models

Posted by jitendra goyal
jitendra goyal
3,752 Points

undefined method `update_balance!' for nil:NilClass

I typed the command - TimeEntry.all.each { |t| t.update_attributes(state: "submitted") }

and got the error-

TimeEntry Load (0.9ms) SELECT account_entries.* FROM account_entries WHERE account_entries.type IN ('TimeEntry') (0.3ms) BEGIN

Account Load (0.6ms) SELECT accounts.* FROM accounts WHERE accounts.id = 1 LIMIT 1

SQL (2.1ms) UPDATE account_entries SET state = 'submitted', updated_at = '2016-03-08 23:46:15' WHERE account_entries.id = 1 (2.6ms) ROLLBACK

NoMethodError: undefined method `update_balance!' for nil:NilClass

1 Answer

Damian Kosowski
Damian Kosowski
19,746 Points
Damian Kosowski
Damian Kosowski
19,746 Points

Is it possible that you have TimeEntry in your database which doesn't have a specified account_id? The update_balance! method is called after saving the entry but it is called on the instance of the Account model. So if there is a TimeEntry without a specified account_id Rails is looking for the account of this time entry which is not present, hence nil.