#86 Edit payment

* adds button for payment editing
* adds new edit form payment editing
* adds tests for views and workflow

compensation/forms/modalForms.py

@@ -21,7 +21,7 @@ from konova.contexts import BaseContext
 from konova.forms import BaseModalForm, NewDocumentForm, RemoveModalForm
 from konova.models import DeadlineType
 from konova.utils.message_templates import FORM_INVALID, ADDED_COMPENSATION_STATE, ADDED_DEADLINE, \
-    ADDED_COMPENSATION_ACTION
+    ADDED_COMPENSATION_ACTION, PAYMENT_EDITED
 
 
 class NewPaymentForm(BaseModalForm):
@@ -103,6 +103,32 @@ class NewPaymentForm(BaseModalForm):
         return pay
 
 
+class EditPaymentModalForm(NewPaymentForm):
+    """ Form handling edit for Payment
+
+    """
+    payment = None
+
+    def __init__(self, *args, **kwargs):
+        self.payment = kwargs.pop("payment", None)
+        super().__init__(*args, **kwargs)
+        form_date = {
+            "amount": self.payment.amount,
+            "due": str(self.payment.due_on),
+            "comment": self.payment.comment,
+        }
+        self.load_initial_data(form_date, disabled_fields=[])
+
+    def save(self):
+        payment = self.payment
+        payment.amount = self.cleaned_data.get("amount", None)
+        payment.due_on = self.cleaned_data.get("due", None)
+        payment.comment = self.cleaned_data.get("comment", None)
+        payment.save()
+        self.instance.mark_as_edited(self.user, self.request, edit_comment=PAYMENT_EDITED)
+        return payment
+
+
 class RemovePaymentModalForm(RemoveModalForm):
     """ Removing modal form for Payment