Fix inline imports

Author: shosca

django_sorcery/db/__init__.py

@@ -143,8 +143,18 @@
 
 from __future__ import absolute_import, print_function, unicode_literals
 
+from . import middleware
 from .sqlalchemy import SQLAlchemy  # noqa
 from .utils import dbdict
 
 
 databases = dbdict()
+
+
+class SQLAlchemyMiddleware(middleware.SQLAlchemyDBMiddleware):
+
+    db = databases
+
+
+# For backwards compat, we set it back to the middleware module
+middleware.SQLAlchemyMiddleware = SQLAlchemyMiddleware

django_sorcery/db/fields.py

@@ -9,6 +9,8 @@
 from django.core import validators as django_validators
 from django.forms import fields as djangofields
 
+from .. import fields as sorceryfields
+
 
 __all__ = [
     "BigIntegerField",
@@ -208,9 +210,7 @@ def get_type(self, type_class, type_kwargs):
 
     def get_form_class(self, kwargs):
         if self.type.enum_class:
-            from ..fields import EnumField
-
-            return EnumField
+            return sorceryfields.EnumField
 
         return djangofields.TypedChoiceField
 

django_sorcery/db/meta/__init__.py

@@ -1,9 +1,32 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import, print_function, unicode_literals
+import sys
+import types
 
 
-if True:  # skipping importanize, imports need to be in this order for py2
-    from .column import *  # noqa
-    from .model import *  # noqa
-    from .composite import *  # noqa
-    from .relations import *  # noqa
+class lazy_module(types.ModuleType):
+    def __init__(self, name, old_module, origins):
+        super(lazy_module, self).__init__(name)
+        self.origins = origins or {}
+        self.__dict__.update(
+            {
+                "__file__": old_module.__file__,
+                "__package__": old_module.__package__,
+                "__path__": old_module.__path__,
+                "__doc__": old_module.__doc__,
+            }
+        )
+
+    def __getattr__(self, name):
+        if name in self.origins:
+            module = __import__(self.__name__ + "." + self.origins[name], None, None, [name])
+            return getattr(module, name)
+        return types.ModuleType.__getattribute__(self, name)
+
+
+old_module = sys.modules[__name__]
+sys.modules[__name__] = lazy_module(
+    __name__,
+    old_module,
+    {"model_info": "model", "Identity": "model", "relation_info": "relations", "column_info": "column"},
+)

django_sorcery/db/meta/relations.py

@@ -6,6 +6,8 @@
 
 from django.core.exceptions import ImproperlyConfigured
 
+from ...fields import ModelChoiceField, ModelMultipleChoiceField
+
 
 class relation_info(object):
     """
@@ -114,8 +116,6 @@ def formfield(self, form_class=None, **kwargs):
             return form_class(self.related_model, **field_kwargs)
 
     def get_form_class(self):
-        from ...fields import ModelChoiceField, ModelMultipleChoiceField
-
         if self.uselist:
             return ModelMultipleChoiceField
 

django_sorcery/db/middleware.py

@@ -2,7 +2,6 @@
 from __future__ import absolute_import, print_function, unicode_literals
 import logging
 
-from . import databases
 from .signals import all_signals
 
 
@@ -78,8 +77,3 @@ def commit(self, request, response):
 
     def remove(self, request, response):
         self.db.remove()
-
-
-class SQLAlchemyMiddleware(SQLAlchemyDBMiddleware):
-
-    db = databases

django_sorcery/db/models.py

@@ -12,6 +12,7 @@
 
 from django.utils.text import camel_case_to_spaces
 
+from ..forms import model_to_dict as real_model_to_dict
 from . import meta, signals
 from .mixins import CleanMixin
 
@@ -39,9 +40,7 @@ def get_identity_key(model, kwargs):
 
 def model_to_dict(instance, fields=None, exclude=None):
     warnings.warn("Deprecated, use django_sorcery.forms.model_to_dict instead.", DeprecationWarning)
-    from ..forms import model_to_dict
-
-    return model_to_dict(instance, fields=fields, exclude=exclude)
+    return real_model_to_dict(instance, fields=fields, exclude=exclude)
 
 
 def simple_repr(instance, fields=None):

django_sorcery/db/sqlalchemy.py

@@ -14,6 +14,7 @@
 from ..utils import make_args
 from . import fields
 from .composites import BaseComposite, CompositeField
+from .middleware import SQLAlchemyDBMiddleware
 from .models import Base, BaseMeta
 from .query import Query, QueryProperty
 from .relations import RelationsMixin
@@ -239,8 +240,6 @@ def make_middleware(self):
         """
         Creates a middleware to be used in a django application
         """
-        from .middleware import SQLAlchemyDBMiddleware
-
         return type(str("{}SQLAlchemyMiddleware".format(self.alias)), (SQLAlchemyDBMiddleware,), {"db": self})
 
     def args(self, *args, **kwargs):

django_sorcery/fields.py

@@ -9,6 +9,7 @@
 from django.forms import fields as djangofields
 from django.utils.translation import gettext_lazy
 
+from .db import meta
 from .utils import suppress
 
 
@@ -110,7 +111,6 @@ def __init__(
 
         self._choices = None
         self.model = model
-        from .db import meta
 
         self.model_info = meta.model_info(model)
         self.session = session

django_sorcery/validators/__init__.py

@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import, print_function, unicode_literals
 
-
-if True:
-    from .runner import ValidationRunner  # noqa
-    from .base import *  # noqa
+from .base import *  # noqa
+from .runner import ValidationRunner  # noqa

django_sorcery/validators/base.py

@@ -7,6 +7,8 @@
 from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
 
+from ..db import meta
+
 
 class ValidateTogetherModelFields(object):
     """
@@ -67,8 +69,6 @@ def __init__(self, session, *args, **kwargs):
     def __call__(self, m):
         clauses = [getattr(m.__class__, attr) == getattr(m, attr) for attr in self.attrs]
 
-        from ..db import meta
-
         info = meta.model_info(m)
         state = info.sa_state(m)
         if state.persistent: