Fixed #29470 -- Logged makemigrations automatic decisions in non-interactive mode.

2 files changed, 38 insertions, 1 deletions

diff --git a/django/core/management/commands/makemigrations.py b/django/core/management/commands/makemigrations.py
index d8eef481bd..9077660467 100644
--- a/django/core/management/commands/makemigrations.py
+++ b/django/core/management/commands/makemigrations.py
@@ -146,7 +146,12 @@ class Command(BaseCommand):
         if self.interactive:
             questioner = InteractiveMigrationQuestioner(specified_apps=app_labels, dry_run=self.dry_run)
         else:
-            questioner = NonInteractiveMigrationQuestioner(specified_apps=app_labels, dry_run=self.dry_run)
+            questioner = NonInteractiveMigrationQuestioner(
+                specified_apps=app_labels,
+                dry_run=self.dry_run,
+                verbosity=self.verbosity,
+                log=self.log,
+            )
         # Set up autodetector
         autodetector = MigrationAutodetector(
             loader.project_state(),
diff --git a/django/db/migrations/questioner.py b/django/db/migrations/questioner.py
index 9284e6be41..17883ca76c 100644
--- a/django/db/migrations/questioner.py
+++ b/django/db/migrations/questioner.py
@@ -258,15 +258,47 @@ class InteractiveMigrationQuestioner(MigrationQuestioner):
 
 
 class NonInteractiveMigrationQuestioner(MigrationQuestioner):
+    def __init__(
+        self, defaults=None, specified_apps=None, dry_run=None, verbosity=1,
+        log=None,
+    ):
+        self.verbosity = verbosity
+        self.log = log
+        super().__init__(
+            defaults=defaults, specified_apps=specified_apps, dry_run=dry_run,
+        )
+
+    def log_lack_of_migration(self, field_name, model_name, reason):
+        if self.verbosity > 0:
+            self.log(
+                f"Field '{field_name}' on model '{model_name}' not migrated: "
+                f"{reason}."
+            )
 
     def ask_not_null_addition(self, field_name, model_name):
         # We can't ask the user, so act like the user aborted.
+        self.log_lack_of_migration(
+            field_name,
+            model_name,
+            'it is impossible to add a non-nullable field without specifying '
+            'a default',
+        )
         sys.exit(3)
 
     def ask_not_null_alteration(self, field_name, model_name):
         # We can't ask the user, so set as not provided.
+        self.log(
+            f"Field '{field_name}' on model '{model_name}' given a default of "
+            f"NOT PROVIDED and must be corrected."
+        )
         return NOT_PROVIDED
 
     def ask_auto_now_add_addition(self, field_name, model_name):
         # We can't ask the user, so act like the user aborted.
+        self.log_lack_of_migration(
+            field_name,
+            model_name,
+            "it is impossible to add a field with 'auto_now_add=True' without "
+            "specifying a default",
+        )
         sys.exit(3)