fix import cycle

rest_models/backend/compiler.py

@@ -23,11 +23,6 @@
 from rest_models.backend.utils import message_from_response
 from rest_models.router import RestModelRouter
 
-from rest_models.checks import register_checks
-
-register_checks()
-
-
 logger = logging.getLogger(__name__)
 
 Alias = namedtuple('Alias', 'model,parent,field,attrname,m2m')

rest_models/checks.py

@@ -6,13 +6,12 @@
 from django.apps import apps
 from django.core.checks import Error, Tags, register
 
-from rest_models.router import RestModelRouter
-
 logger = logging.getLogger(__name__)
 
 
 def api_struct_check(app_configs, **kwargs):
     from rest_models.backend.compiler import get_resource_path  # NOQA
+    from rest_models.router import RestModelRouter  # NOQA
 
     errors = []
 

rest_models/router.py

@@ -10,10 +10,14 @@
 from django.db import connections
 
 from rest_models.backend.base import DatabaseWrapper
+from rest_models.checks import register_checks
 
 logger = logging.getLogger(__name__)
 
 
+register_checks()
+
+
 def get_default_api_database(databases):
     """
     parse all database settings and return the database matching current backend.

testapi/badapi/models.py

@@ -46,6 +46,7 @@ def __str__(self):
 class BB(models.Model):
     name = models.CharField(max_length=135)
     b = models.ManyToManyField(B, related_name='bb')
+    a = models.ManyToManyField(A, related_name='bb')
 
     def __str__(self):
         return self.name  # pragma: no cover

testapi/badapi/serializers.py

@@ -32,8 +32,9 @@ class Meta:
 
 class BBSerializer(DynamicModelSerializer):
     b = DynamicRelationField(BSerializer, many=True)
+    a = DynamicRelationField(ASerializer, many=False)
 
     class Meta:
         model = BB
         name = 'bb'
-        fields = ('id', 'name', 'b')
+        fields = ('id', 'name', 'b', 'a')

testsettings.py

@@ -60,7 +60,6 @@
     if os.environ.get('WITH_BADAPP', "false").lower().strip() == 'true'
     else tuple()
 )
-print(INSTALLED_APPS)
 DATABASE_ROUTERS = [
     'rest_models.router.RestModelRouter',
 ]