[1.8.x] Fixed #25231 -- Added recording of squashed migrations in the migrate command.

Ensured squashed migrations are recorded as applied when the
migrate command is run and all of the original migrations
have been previously applied.

Backport of 69db1c7455 from master

django/core/management/commands/migrate.py

@@ -197,6 +197,7 @@ class Command(BaseCommand):
         if self.verbosity >= 1:
             self.stdout.write(self.style.MIGRATE_HEADING("Running migrations:"))
         if not plan:
+            executor.check_replacements()
             if self.verbosity >= 1:
                 self.stdout.write("  No migrations to apply.")
                 # If there's changes that aren't in migrations yet, tell them how to fix it.

docs/releases/1.8.4.txt

@@ -24,3 +24,6 @@ Bugfixes
 
 * Fixed ``has_changed()`` method in ``contrib.postgres.forms.HStoreField``
   (:ticket:`25215`, :ticket:`25233`).
+
+* Fixed the recording of squashed migrations when running the ``migrate``
+  command (:ticket:`25231`).

tests/migrations/test_commands.py

@@ -10,6 +10,7 @@ from django.apps import apps
 from django.core.management import CommandError, call_command
 from django.db import DatabaseError, connection, models
 from django.db.migrations import questioner
+from django.db.migrations.recorder import MigrationRecorder
 from django.test import ignore_warnings, mock, override_settings
 from django.utils import six
 from django.utils.deprecation import RemovedInDjango110Warning
@@ -338,6 +339,51 @@ class MigrateTests(MigrationTestBase):
         """
         call_command("migrate", "migrated_unapplied_app", stdout=six.StringIO())
 
+    @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"})
+    def test_migrate_record_replaced(self):
+        """
+        Running a single squashed migration should record all of the original
+        replaced migrations as run.
+        """
+        recorder = MigrationRecorder(connection)
+        out = six.StringIO()
+        call_command("migrate", "migrations", verbosity=0)
+        call_command("showmigrations", "migrations", stdout=out, no_color=True)
+        self.assertEqual(
+            'migrations\n'
+            ' [x] 0001_squashed_0002 (2 squashed migrations)\n',
+            out.getvalue().lower()
+        )
+        applied_migrations = recorder.applied_migrations()
+        self.assertIn(("migrations", "0001_initial"), applied_migrations)
+        self.assertIn(("migrations", "0002_second"), applied_migrations)
+        self.assertIn(("migrations", "0001_squashed_0002"), applied_migrations)
+        # Rollback changes
+        call_command("migrate", "migrations", "zero", verbosity=0)
+
+    @override_settings(MIGRATION_MODULES={"migrations": "migrations.test_migrations_squashed"})
+    def test_migrate_record_squashed(self):
+        """
+        Running migrate for a squashed migration should record as run
+        if all of the replaced migrations have been run (#25231).
+        """
+        recorder = MigrationRecorder(connection)
+        recorder.record_applied("migrations", "0001_initial")
+        recorder.record_applied("migrations", "0002_second")
+        out = six.StringIO()
+        call_command("migrate", "migrations", verbosity=0)
+        call_command("showmigrations", "migrations", stdout=out, no_color=True)
+        self.assertEqual(
+            'migrations\n'
+            ' [x] 0001_squashed_0002 (2 squashed migrations)\n',
+            out.getvalue().lower()
+        )
+        self.assertIn(
+            ("migrations", "0001_squashed_0002"),
+            recorder.applied_migrations()
+        )
+        # No changes were actually applied so there is nothing to rollback
+
 
 class MakeMigrationsTests(MigrationTestBase):
     """