Moved migration exception classes to shared module (811d7870) · Commits · Dom Sekotill / django

django/db/migrations/exceptions.py

0 → 100644

+55 −0

Original line number	Diff line number	Diff line
		from __future__ import unicode_literals

		from django.utils.encoding import python_2_unicode_compatible


		class AmbiguityError(Exception):
		"""
		Raised when more than one migration matches a name prefix.
		"""
		pass


		class BadMigrationError(Exception):
		"""
		Raised when there's a bad migration (unreadable/bad format/etc.).
		"""
		pass


		class CircularDependencyError(Exception):
		"""
		Raised when there's an impossible-to-resolve circular dependency.
		"""
		pass


		class InvalidBasesError(ValueError):
		"""
		Raised when a model's base classes can't be resolved.
		"""
		pass


		class IrreversibleError(RuntimeError):
		"""
		Raised when a irreversible migration is about to be reversed.
		"""
		pass


		@python_2_unicode_compatible
		class NodeNotFoundError(LookupError):
		"""
		Raised when an attempt on a node is made that is not available in the graph.
		"""

		def __init__(self, message, node):
		self.message = message
		self.node = node

		def __str__(self):
		return self.message

		def __repr__(self):
		return "NodeNotFoundError(%r)" % self.node

+2 −24

Original line number	Diff line number	Diff line
		@@ -8,6 +8,8 @@ from django.utils.datastructures import OrderedSet
		from django.utils.encoding import python_2_unicode_compatible
		from django.utils.functional import total_ordering

		from .exceptions import CircularDependencyError, NodeNotFoundError

		RECURSION_DEPTH_WARNING = (
		"Maximum recursion depth exceeded while generating migration graph, "
		"falling back to iterative approach. If you're experiencing performance issues, "
		@@ -276,27 +278,3 @@ class MigrationGraph(object):

		def __contains__(self, node):
		return node in self.nodes


		class CircularDependencyError(Exception):
		"""
		Raised when there's an impossible-to-resolve circular dependency.
		"""
		pass


		@python_2_unicode_compatible
		class NodeNotFoundError(LookupError):
		"""
		Raised when an attempt on a node is made that is not available in the graph.
		"""

		def __init__(self, message, node):
		self.message = message
		self.node = node

		def __str__(self):
		return self.message

		def __repr__(self):
		return "NodeNotFoundError(%r)" % self.node

+3 −15

Original line number	Diff line number	Diff line
		@@ -6,10 +6,12 @@ from importlib import import_module

		from django.apps import apps
		from django.conf import settings
		from django.db.migrations.graph import MigrationGraph, NodeNotFoundError
		from django.db.migrations.graph import MigrationGraph
		from django.db.migrations.recorder import MigrationRecorder
		from django.utils import six

		from .exceptions import AmbiguityError, BadMigrationError, NodeNotFoundError

		MIGRATIONS_MODULE_NAME = 'migrations'


		@@ -324,17 +326,3 @@ class MigrationLoader(object):
		See graph.make_state for the meaning of "nodes" and "at_end"
		"""
		return self.graph.make_state(nodes=nodes, at_end=at_end, real_apps=list(self.unmigrated_apps))


		class BadMigrationError(Exception):
		"""
		Raised when there's a bad migration (unreadable/bad format/etc.)
		"""
		pass


		class AmbiguityError(Exception):
		"""
		Raised when more than one migration matches a name prefix
		"""
		pass

+3 −5

Original line number	Diff line number	Diff line
		@@ -3,6 +3,8 @@ from __future__ import unicode_literals
		from django.db.transaction import atomic
		from django.utils.encoding import python_2_unicode_compatible

		from .exceptions import IrreversibleError


		@python_2_unicode_compatible
		class Migration(object):
		@@ -39,10 +41,6 @@ class Migration(object):
		# are not applied.
		replaces = []

		# Error class which is raised when a migration is irreversible
		class IrreversibleError(RuntimeError):
		pass

		def __init__(self, name, app_label):
		self.name = name
		self.app_label = app_label
		@@ -138,7 +136,7 @@ class Migration(object):
		for operation in self.operations:
		# If it's irreversible, error out
		if not operation.reversible:
		raise Migration.IrreversibleError("Operation %s in %s is not reversible" % (operation, self))
		raise IrreversibleError("Operation %s in %s is not reversible" % (operation, self))
		# Preserve new state from previous run to not tamper the same state
		# over all operations
		new_state = new_state.clone()

+1 −3

Original line number	Diff line number	Diff line
		@@ -18,9 +18,7 @@ from django.utils.functional import cached_property
		from django.utils.module_loading import import_string
		from django.utils.version import get_docs_version


		class InvalidBasesError(ValueError):
		pass
		from .exceptions import InvalidBasesError


		def _get_app_label_and_model_name(model, app_label=''):