import plugins

.coverage

@@ -1 +1 @@
-!coverage.py: This is a private format, don't read it directly!{"lines": {"/w/_LIB/django-model-to-dict/django_model_to_dict/settings.py": [1, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17], "/w/_LIB/django-model-to-dict/django_model_to_dict/apps.py": [], "/w/_LIB/django-model-to-dict/django_model_to_dict/__init__.py": [1], "/w/_LIB/django-model-to-dict/django_model_to_dict/plugins/__init__.py": [], "/w/_LIB/django-model-to-dict/django_model_to_dict/models.py": [1, 2, 3, 6, 7, 9, 10, 11, 14, 15, 17, 18, 19, 21, 22, 24, 27, 28, 30, 31, 32, 35, 36, 37, 38, 40, 43, 44, 46, 47, 48, 50, 53, 54, 55, 57, 60, 61, 63, 64, 65, 68, 69, 70, 72, 75, 76, 78, 79, 80, 83, 84, 85, 88, 89, 92, 93, 94, 97, 98, 99, 100, 103, 104, 105, 108, 109, 110, 112, 113, 116, 117, 119, 120, 121, 123, 124, 127, 128, 130, 131, 132, 134, 137, 138, 140, 141, 142, 144, 145, 146, 147], "/w/_LIB/django-model-to-dict/django_model_to_dict/plugins/serialization/filebrowser_field.py": [], "/w/_LIB/django-model-to-dict/django_model_to_dict/mixins.py": [256, 1, 5, 264, 265, 267, 268, 271, 272, 273, 274, 275, 276, 280, 281, 282, 283, 285, 286, 287, 288, 291, 292, 293, 294, 296, 297, 298, 299, 302, 303, 304, 305, 307, 308, 309, 310, 312, 315, 316, 317, 318, 319, 320, 321, 322, 324, 325, 326, 327, 328, 329, 330, 331, 332, 334, 335, 336, 337, 338, 339, 340, 341, 342, 344, 349, 350, 351, 354, 355, 356, 140, 142, 143, 144, 161, 163, 166, 169, 172, 175, 178, 179, 182, 183, 184, 185, 186, 189, 190, 191, 192, 193, 196, 197, 198, 199, 203, 207, 210, 211, 212, 213, 214, 215, 216, 217, 218, 221, 223, 226, 229, 232, 234, 235, 236, 238, 239, 240, 242, 243, 244, 246, 248, 250, 254], "/w/_LIB/django-model-to-dict/django_model_to_dict/plugins/serialization/__init__.py": []}}
+!coverage.py: This is a private format, don't read it directly!{"lines": {"/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/models.py": [1, 2, 3, 6, 7, 9, 10, 11, 14, 15, 17, 18, 19, 21, 22, 24, 27, 28, 30, 31, 32, 35, 36, 37, 38, 40, 43, 44, 46, 47, 48, 50, 53, 54, 55, 57, 60, 61, 63, 64, 65, 68, 69, 70, 72, 75, 76, 78, 79, 80, 83, 84, 85, 88, 89, 92, 93, 94, 97, 98, 99, 100, 103, 104, 105, 108, 110, 112, 113, 116, 117, 119, 120, 121, 123, 124, 127, 128, 130, 131, 132, 134, 137, 138, 140, 141, 142, 144, 145, 146, 147], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/plugins/serialization/__init__.py": [], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/__init__.py": [1], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/apps.py": [], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/plugins/serialization/filebrowser_field.py": [], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/mixins.py": [1, 3, 260, 6, 263, 266, 267, 268, 269, 270, 271, 275, 276, 277, 278, 280, 281, 282, 283, 286, 287, 288, 289, 291, 292, 293, 294, 297, 298, 299, 300, 302, 303, 304, 305, 307, 310, 311, 312, 313, 314, 315, 316, 317, 319, 320, 321, 322, 323, 324, 325, 326, 327, 329, 330, 331, 332, 333, 334, 335, 336, 337, 339, 344, 345, 346, 349, 350, 351, 259, 141, 143, 144, 145, 162, 164, 167, 170, 173, 176, 179, 180, 183, 184, 185, 186, 187, 190, 191, 192, 193, 194, 197, 198, 199, 200, 202, 262, 205, 206, 207, 208, 209, 210, 211, 212, 213, 216, 218, 221, 224, 227, 229, 230, 231, 233, 234, 235, 237, 238, 239, 241, 243, 245, 249, 251], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/settings.py": [1, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17], "/mnt/c/Users/Andres/apps/django-model-to-dict/django_model_to_dict/plugins/__init__.py": []}}

django_model_to_dict/mixins.py

@@ -1,5 +1,6 @@
 from .settings import TO_DICT_PREFIXES, TO_DICT_PREFIX_SEPARATOR, TO_DICT_GROUPING,\
     TO_DICT_SERIALIZATION_PLUGINS, TO_DICT_SKIP, TO_DICT_POSTFIXES, TO_DICT_POSTFIX_SEPARATOR
+from django.utils.module_loading import import_string
 
 
 class ToDictMixin:
@@ -198,7 +199,6 @@ def to_dict(self, compress_fields=True, compress_groups=True, compress_prefixes=
                 result[group][field.name] = self._handle_nontrivial_field(field) or field.value_from_object(self)
                 continue
             # TODO: custom mapping
-
             result[field.name] = self._handle_nontrivial_field(field) or field.value_from_object(self)
 
         # setup empty values for None-valued fields
@@ -242,7 +242,8 @@ def _handle_nontrivial_field(self, field):
 
         serialization_plugins = getattr(self, 'TO_DICT_SERIALIZATION_PLUGINS', TO_DICT_SERIALIZATION_PLUGINS)
 
-        for plugin in serialization_plugins:            
+        for plugin_str in serialization_plugins:
+            plugin = import_string(plugin_str)()
             if plugin.check_field(field):
                 return plugin.serialize_field(field, self)
         return None

django_model_to_dict/models.py

@@ -131,7 +131,7 @@ class Meta:
         verbose_name = _('Order')
         verbose_name_plural = _('Orders')
 
-    customer = models.ForeignKey(to=Customer, verbose_name=_('customer'), related_name='orders')
+    customer = models.ForeignKey(to=Customer, verbose_name=_('customer'), related_name='orders', on_delete=models.CASCADE)
 
 
 class OrderPosition(models.Model, ToDictMixin):
@@ -143,5 +143,5 @@ class Meta:
 
     price = models.PositiveIntegerField(verbose_name=_('price'))
     quantity = models.PositiveIntegerField(verbose_name=_('quantity'))
-    product = models.ForeignKey(to=Product, verbose_name=_('product'), related_name='order_positions')
-    order = models.ForeignKey(to=Order, verbose_name=_('order'), related_name='order_positions')
+    product = models.ForeignKey(to=Product, verbose_name=_('product'), related_name='order_positions', on_delete=models.CASCADE)
+    order = models.ForeignKey(to=Order, verbose_name=_('order'), related_name='order_positions', on_delete=models.CASCADE)

runtests.py

@@ -12,7 +12,7 @@
                 "ENGINE": "django.db.backends.sqlite3",
             }
         },
-        ROOT_URLCONF="django_model_to_dict.urls",
+        #ROOT_URLCONF="django_model_to_dict.urls",
         INSTALLED_APPS=[
             "django.contrib.auth",
             "django.contrib.contenttypes",

tox.ini

@@ -10,4 +10,5 @@ deps =
     django-110: Django>=1.10
     -r{toxinidir}/requirements_test.txt
 basepython =
-    py34: python3.4
+    py34: python3.4
+    py35: python3.5