Refactoring

* moves adding of deduction into Intervention and EcoAccount model
* hardens against circular import issues

intervention/models/intervention.py

@@ -12,6 +12,7 @@ from django.db import models, transaction
 from django.db.models import QuerySet
 from django.utils.translation import gettext_lazy as _
 
+from compensation.models import EcoAccountDeduction
 from intervention.managers import InterventionManager
 from intervention.models.legal import Legal
 from intervention.models.responsibility import Responsibility
@@ -213,7 +214,7 @@ class Intervention(BaseObject, ShareableObjectMixin, RecordableObjectMixin, Chec
         """ Adds a new revocation to the intervention
 
         Args:
-            form (NewPaymentForm): The form holding the data
+            form (NewRevocationModalForm): The form holding the data
 
         Returns:
 
@@ -249,6 +250,40 @@ class Intervention(BaseObject, ShareableObjectMixin, RecordableObjectMixin, Chec
                 )
         return revocation
 
+    def add_deduction(self, form):
+        """ Adds a new deduction to the intervention
+
+        Args:
+            form (NewDeductionModalForm): The form holding the data
+
+        Returns:
+
+        """
+        form_data = form.cleaned_data
+        user = form.user
+
+        with transaction.atomic():
+            # Create log entry
+            user_action_edit = UserActionLogEntry.objects.create(
+                user=user,
+                action=UserAction.EDITED
+            )
+            user_action_create = UserActionLogEntry.objects.create(
+                user=user,
+                action=UserAction.CREATED
+            )
+            self.log.add(user_action_edit)
+            self.modified = user_action_edit
+            self.save()
+
+            deduction = EcoAccountDeduction.objects.create(
+                intervention=self,
+                account=form_data["account"],
+                surface=form_data["surface"],
+                created=user_action_create,
+            )
+        return deduction
+
 
 class InterventionDocument(AbstractDocument):
     """