Add --fake option to migrate

2 files changed, 17 insertions, 13 deletions

diff --git a/django/core/management/commands/migrate.py b/django/core/management/commands/migrate.py
index 882ebde073..73d453cf99 100644
--- a/django/core/management/commands/migrate.py
+++ b/django/core/management/commands/migrate.py
@@ -24,6 +24,8 @@ class Command(BaseCommand):
         make_option('--database', action='store', dest='database',
             default=DEFAULT_DB_ALIAS, help='Nominates a database to synchronize. '
                 'Defaults to the "default" database.'),
+        make_option('--fake', action='store_true', dest='fake', default=False,
+            help='Mark migrations as run without actually running them'),
     )
 
     help = "Updates database schema. Manages both apps with migrations and those without."
@@ -109,7 +111,7 @@ class Command(BaseCommand):
             if self.verbosity >= 1:
                 self.stdout.write("  No migrations needed.")
         else:
-            executor.migrate(targets, plan)
+            executor.migrate(targets, plan, fake=options.get("fake", False))
 
     def migration_progress_callback(self, action, migration):
         if self.verbosity >= 1:
@@ -181,7 +183,7 @@ class Command(BaseCommand):
                     for statement in sql:
                         cursor.execute(statement)
                     tables.append(connection.introspection.table_name_converter(model._meta.db_table))
-        
+
         # We force a commit here, as that was the previous behaviour.
         # If you can prove we don't need this, remove it.
         transaction.set_dirty(using=connection.alias)
diff --git a/django/db/migrations/executor.py b/django/db/migrations/executor.py
index 46bbfc0ef2..9d99c90c11 100644
--- a/django/db/migrations/executor.py
+++ b/django/db/migrations/executor.py
@@ -44,7 +44,7 @@ class MigrationExecutor(object):
                         applied.add(migration)
         return plan
 
-    def migrate(self, targets, plan=None):
+    def migrate(self, targets, plan=None, fake=False):
         """
         Migrates the database up to the given targets.
         """
@@ -52,32 +52,34 @@ class MigrationExecutor(object):
             plan = self.migration_plan(targets)
         for migration, backwards in plan:
             if not backwards:
-                self.apply_migration(migration)
+                self.apply_migration(migration, fake=fake)
             else:
-                self.unapply_migration(migration)
+                self.unapply_migration(migration, fake=fake)
 
-    def apply_migration(self, migration):
+    def apply_migration(self, migration, fake=False):
         """
         Runs a migration forwards.
         """
         if self.progress_callback:
             self.progress_callback("apply_start", migration)
-        with self.connection.schema_editor() as schema_editor:
-            project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
-            migration.apply(project_state, schema_editor)
+        if not fake:
+            with self.connection.schema_editor() as schema_editor:
+                project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
+                migration.apply(project_state, schema_editor)
         self.recorder.record_applied(migration.app_label, migration.name)
         if self.progress_callback:
             self.progress_callback("apply_success", migration)
 
-    def unapply_migration(self, migration):
+    def unapply_migration(self, migration, fake=False):
         """
         Runs a migration backwards.
         """
         if self.progress_callback:
             self.progress_callback("unapply_start", migration)
-        with self.connection.schema_editor() as schema_editor:
-            project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
-            migration.unapply(project_state, schema_editor)
+        if not fake:
+            with self.connection.schema_editor() as schema_editor:
+                project_state = self.loader.graph.project_state((migration.app_label, migration.name), at_end=False)
+                migration.unapply(project_state, schema_editor)
         self.recorder.record_unapplied(migration.app_label, migration.name)
         if self.progress_callback:
             self.progress_callback("unapply_success", migration)