general: make connector form parent class a model attribute (#...)

passerelle/base/models.py

@@ -36,6 +36,7 @@ from model_utils.managers import InheritanceManager as ModelUtilsInheritanceMana
 import passerelle
 import requests
 from passerelle.compat import json_loads
+from passerelle.forms import GenericConnectorForm
 from passerelle.utils.api import endpoint
 from passerelle.utils.jsonresponse import APIError
 
@@ -128,6 +129,7 @@ class BaseResource(models.Model):
 
     parameters = None
     manager_view_template_name = None
+    form_base_class = GenericConnectorForm
 
     # permission descriptions
     _can_access_description = _('Access is limited to the following API users:')

passerelle/views.py

@@ -54,7 +54,6 @@ from passerelle.utils.jsonresponse import APIError
 from passerelle.utils.json import unflatten
 
 from .utils import to_json, is_authorized
-from .forms import GenericConnectorForm
 from .forms import ResourceLogSearchForm
 
 if 'mellon' in settings.INSTALLED_APPS:
@@ -161,7 +160,7 @@ class GenericConnectorMixin(object):
         else:
             self.form_class = modelform_factory(
                 self.model,
-                form=GenericConnectorForm,
+                form=self.model.form_base_class,
                 exclude=self.exclude_fields)
             for field in self.form_class.base_fields.values():
                 if isinstance(field.widget, ClearableFileInput):