| from django.db import DatabaseError | |
| class AmbiguityError(Exception): | |
| """More than one migration matches a name prefix.""" | |
| pass | |
| class BadMigrationError(Exception): | |
| """There's a bad migration (unreadable/bad format/etc.).""" | |
| pass | |
| class CircularDependencyError(Exception): | |
| """There's an impossible-to-resolve circular dependency.""" | |
| pass | |
| class InconsistentMigrationHistory(Exception): | |
| """An applied migration has some of its dependencies not applied.""" | |
| pass | |
| class InvalidBasesError(ValueError): | |
| """A model's base classes can't be resolved.""" | |
| pass | |
| class IrreversibleError(RuntimeError): | |
| """An irreversible migration is about to be reversed.""" | |
| pass | |
| class NodeNotFoundError(LookupError): | |
| """An attempt on a node is made that is not available in the graph.""" | |
| def __init__(self, message, node, origin=None): | |
| self.message = message | |
| self.origin = origin | |
| self.node = node | |
| def __str__(self): | |
| return self.message | |
| def __repr__(self): | |
| return "NodeNotFoundError(%r)" % (self.node,) | |
| class MigrationSchemaMissing(DatabaseError): | |
| pass | |
| class InvalidMigrationPlan(ValueError): | |
| pass | |