Simplify the future of our migration history

src/pretix/base/management/commands/migrate.py

@@ -0,0 +1,28 @@
+"""
+Django tries to be helpful by suggesting to run "makemigrations" in red font on every "migrate"
+run when there are things we have no migrations for. Usually, this is intended, and running
+"makemigrations" can really screw up the environment of a user, so we want to prevent novice
+users from doing that by going really dirty and fitlering it from the output.
+"""
+import sys
+
+from django.core.management.base import OutputWrapper
+from django.core.management.commands.migrate import Command as Parent
+
+
+class OutputFilter(OutputWrapper):
+    blacklist = (
+        "Your models have changes that are not yet reflected",
+        "Run 'manage.py makemigrations' to make new "
+    )
+
+    def write(self, msg, style_func=None, ending=None):
+        if any(b in msg for b in self.blacklist):
+            return
+        super().write(msg, style_func, ending)
+
+
+class Command(Parent):
+    def __init__(self, stdout=None, stderr=None, no_color=False, force_color=False):
+        super().__init__(stdout, stderr, no_color, force_color)
+        self.stdout = OutputFilter(stdout or sys.stdout)