The version column used for optimistic locking. Defaults to
lock_version
.
# File lib/active_record/locking/optimistic.rb, line 149 def locking_column reset_locking_column end
Is optimistic locking enabled for this table? 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 138 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 154 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 159 def reset_locking_column set_locking_column DEFAULT_LOCKING_COLUMN end
Set the column to use for optimistic locking. Defaults to
lock_version
.
# File lib/active_record/locking/optimistic.rb, line 143 def set_locking_column(value = nil, &block) define_attr_method :locking_column, value, &block value end
Make sure the lock version column gets updated when counters are updated.
# File lib/active_record/locking/optimistic.rb, line 165 def update_counters(id, counters) counters = counters.merge(locking_column => 1) if locking_enabled? super end