Methods
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Constants
DEFAULT_LOCKING_COLUMN = "lock_version"
 
Instance Public methods
locking_column()

The version column used for optimistic locking. Defaults to lock_version.

Source: show | on GitHub 

# File activerecord/lib/active_record/locking/optimistic.rb, line 141
def locking_column
  @locking_column = DEFAULT_LOCKING_COLUMN unless defined?(@locking_column)
  @locking_column
end
locking_column=(value)

Set the column to use for optimistic locking. Defaults to lock_version.

Source: show | on GitHub 

# File activerecord/lib/active_record/locking/optimistic.rb, line 135
def locking_column=(value)
  reload_schema_from_cache
  @locking_column = value.to_s
end
locking_enabled?()

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).

Source: show | on GitHub 

# File activerecord/lib/active_record/locking/optimistic.rb, line 130
def locking_enabled?
  lock_optimistically && columns_hash[locking_column]
end
reset_locking_column()

Reset the column used for optimistic locking back to the lock_version default.

Source: show | on GitHub 

# File activerecord/lib/active_record/locking/optimistic.rb, line 147
def reset_locking_column
  self.locking_column = DEFAULT_LOCKING_COLUMN
end
update_counters(id, counters)

Make sure the lock version column gets updated when counters are updated.

Source: show | on GitHub 

# File activerecord/lib/active_record/locking/optimistic.rb, line 153
def update_counters(id, counters)
  counters = counters.merge(locking_column => 1) if locking_enabled?
  super
end