From 6e28f1260ac689cd1ea09a93a084b8d52ea5cdc6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aur=C3=A9lien=20Delobelle?= <aurelien.delobelle@gmail.com>
Date: Thu, 26 Oct 2017 15:42:28 +0200
Subject: [PATCH] =?UTF-8?q?Fix=20setup=20of=20the=20kfet=20generic=20user?=
 =?UTF-8?q?=20when=E2=80=A6?=
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…a specific migration is targeted.
---
 kfet/auth/apps.py  | 21 +++++++++++++++++++--
 kfet/auth/utils.py |  2 +-
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/kfet/auth/apps.py b/kfet/auth/apps.py
index d91931f5..d822c80f 100644
--- a/kfet/auth/apps.py
+++ b/kfet/auth/apps.py
@@ -10,5 +10,22 @@ class KFetAuthConfig(AppConfig):
 
     def ready(self):
         from . import signals  # noqa
-        from .utils import setup_kfet_generic_user
-        post_migrate.connect(setup_kfet_generic_user, sender=self)
+        post_migrate.connect(finish_setup_kfet_generic_user, sender=self)
+
+
+def finish_setup_kfet_generic_user(sender, apps, **kwargs):
+    from kfet.models import Account
+    from .utils import setup_kfet_generic_user
+    # Even if no kfetauth migration has been applied, the post_migrate signal
+    # is issued for KFetAuthConfig.
+    # Before finishing setup of the kfet generic user, check dependencies are
+    # ready: kfet.Account model and gestion.Profile (old schema may not use
+    # this model).
+    try:
+        apps.get_model('kfet', 'Account')
+        apps.get_model('gestion', 'Profile')
+        Account.objects.get_generic()
+    except (LookupError, Account.DoesNotExist):
+        return
+
+    setup_kfet_generic_user()
diff --git a/kfet/auth/utils.py b/kfet/auth/utils.py
index 053e5798..f4979fef 100644
--- a/kfet/auth/utils.py
+++ b/kfet/auth/utils.py
@@ -15,7 +15,7 @@ def get_kfet_generic_user():
     return Account.objects.get_generic().user
 
 
-def setup_kfet_generic_user(**kwargs):
+def setup_kfet_generic_user():
     """
     First steps of setup of the kfet generic user are done in a migration, as
     it is more robust against database schema changes.