Reverting unapplied migrations check away from being a system-level check.

This reverts commit 0ac13ecc.

django/core/checks/__init__.py

@@ -8,7 +8,6 @@ from .registry import register, run_checks, tag_exists
 
 # Import these to force registration of checks
 import django.core.checks.compatibility.django_1_6_0  # NOQA
-import django.core.checks.migrations  # NOQA
 import django.core.checks.model_checks  # NOQA
 
 __all__ = [

django/core/checks/migrations.py

-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
-from django.conf import settings
-
-from . import Warning, register
-
-
-@register('migrations')
-def check_migrations(app_configs=None, **kwargs):
-    """
-    Checks to see if the set of migrations on disk matches the
-    migrations in the database. Prints a warning if they don't match.
-    """
-    from django.db import connections, DEFAULT_DB_ALIAS
-    from django.db.migrations.executor import MigrationExecutor
-
-    errors = []
-    plan = None
-    if settings.DATABASES:
-        executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
-        plan = executor.migration_plan(executor.loader.graph.leaf_nodes())
-    if plan:
-        errors.append(
-            Warning(
-                "You have unapplied migrations; "
-                "your app may not work properly until they are applied.",
-                hint="Run 'python manage.py migrate' to apply them.",
-            )
-        )
-    return errors

django/core/management/commands/runserver.py

@@ -10,6 +10,8 @@ import socket
 
 from django.core.management.base import BaseCommand, CommandError
 from django.core.servers.basehttp import run, get_internal_wsgi_application
+from django.db import connections, DEFAULT_DB_ALIAS
+from django.db.migrations.executor import MigrationExecutor
 from django.utils import autoreload
 from django.utils import six
 
@@ -99,6 +101,7 @@ class Command(BaseCommand):
 
         self.stdout.write("Performing system checks...\n\n")
         self.validate(display_num_errors=True)
+        self.check_migrations()
         now = datetime.now().strftime('%B %d, %Y - %X')
         if six.PY2:
             now = now.decode('utf-8')
@@ -143,5 +146,16 @@ class Command(BaseCommand):
                 self.stdout.write(shutdown_message)
             sys.exit(0)
 
+    def check_migrations(self):
+        """
+        Checks to see if the set of migrations on disk matches the
+        migrations in the database. Prints a warning if they don't match.
+        """
+        executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
+        plan = executor.migration_plan(executor.loader.graph.leaf_nodes())
+        if plan:
+            self.stdout.write(self.style.NOTICE("\nYou have unapplied migrations; your app may not work properly until they are applied."))
+            self.stdout.write(self.style.NOTICE("Run 'python manage.py migrate' to apply them.\n"))
+
 # Kept for backward compatibility
 BaseRunserverCommand = Command