c.l.w.i.ReadOnlyModeViolation(Exception) : class documentation

Known subclasses: canonical.launchpad.webapp.interfaces.ReadOnlyModeDisallowedStore

An attempt was made to write to a slave Store in read-only mode.

This can happen in legacy code where writes are being made to an object retrieved from the default Store rather than casting the object to a writable version using IMasterObject(obj).