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 155
def locking_column
  reset_locking_column
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 144
def locking_enabled?
  lock_optimistically && columns_hash[locking_column]
end
quoted_locking_column()

Quote the column name used for optimistic locking.

Source: show | on GitHub 

# File activerecord/lib/active_record/locking/optimistic.rb, line 160
def quoted_locking_column
  connection.quote_column_name(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 165
def reset_locking_column
  set_locking_column DEFAULT_LOCKING_COLUMN
end
set_locking_column(value = nil, &block)

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 149
def set_locking_column(value = nil, &block)
  define_attr_method :locking_column, value, &block
  value
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 171
def update_counters(id, counters)
  counters = counters.merge(locking_column => 1) if locking_enabled?
  super
end