Fixed #25259 -- Added comments to header of generated migration files

django/db/migrations/writer.py

@@ -10,6 +10,7 @@ import re
 import types
 from importlib import import_module
 
+from django import get_version
 from django.apps import apps
 from django.db import migrations, models
 from django.db.migrations.loader import MigrationLoader
@@ -21,7 +22,7 @@ from django.utils.encoding import force_text
 from django.utils.functional import Promise
 from django.utils.inspect import get_func_args
 from django.utils.module_loading import module_dir
-from django.utils.timezone import utc
+from django.utils.timezone import now, utc
 from django.utils.version import get_docs_version
 
 
@@ -211,6 +212,11 @@ class MigrationWriter(object):
         # If there's a replaces, make a string for it
         if self.migration.replaces:
             items['replaces_str'] = "\n    replaces = %s\n" % self.serialize(self.migration.replaces)[0]
+        # Hinting that goes into comment
+        items.update(
+            version=get_version(),
+            timestamp=now().strftime("%Y-%m-%d %H:%M"),
+        )
 
         if self.migration.initial:
             items['initial_str'] = "\n    initial = True\n"
@@ -526,6 +532,7 @@ class MigrationWriter(object):
 
 MIGRATION_TEMPLATE = """\
 # -*- coding: utf-8 -*-
+# Generated by Django %(version)s on %(timestamp)s
 from __future__ import unicode_literals
 
 %(imports)s