# File lib/active_record/locking/optimistic.rb, line 167 def column_defaults @column_defaults ||= begin defaults = super if defaults.key?(locking_column) && lock_optimistically defaults[locking_column] ||= 0 end defaults end end
The version column used for optimistic locking. Defaults to
lock_version
.
# File lib/active_record/locking/optimistic.rb, line 145 def locking_column reset_locking_column unless defined?(@locking_column) @locking_column end
Set the column to use for optimistic locking. Defaults to
lock_version
.
# File lib/active_record/locking/optimistic.rb, line 140 def locking_column=(value) @locking_column = value.to_s end
Returns true if the lock_optimistically
flag is set to true
(which it is, by default) and the table includes the
locking_column
column (defaults to lock_version
).
# File lib/active_record/locking/optimistic.rb, line 135 def locking_enabled? lock_optimistically && columns_hash[locking_column] end
Quote the column name used for optimistic locking.
# File lib/active_record/locking/optimistic.rb, line 151 def quoted_locking_column connection.quote_column_name(locking_column) end
Reset the column used for optimistic locking back to the
lock_version
default.
# File lib/active_record/locking/optimistic.rb, line 156 def reset_locking_column self.locking_column = DEFAULT_LOCKING_COLUMN end
Make sure the lock version column gets updated when counters are updated.
# File lib/active_record/locking/optimistic.rb, line 162 def update_counters(id, counters) counters = counters.merge(locking_column => 1) if locking_enabled? super end