#18 File upload in certain folders

* refactors documents and file upload to be distributed into different subfolders, depending on the type of document (InterventionDocument, RevocationDocument, ...)
* refactors Document model into AbstractDocument
* subclasses RevocationDocument, InterventionDocument, COmpensationDocument, EmaDocument and EcoAccountDocument from AbstractDocument to provide proper functionality for each
* adds new specialized routes for each new document type (opening, removing)
* drops generic get and remove routes for documents

konova/forms.py

@@ -21,11 +21,11 @@ from django.shortcuts import render
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 
-from compensation.models import EcoAccount
-from ema.models import Ema
-from intervention.models import Intervention
+from compensation.models import EcoAccount, Compensation, EcoAccountDocument, CompensationDocument
+from ema.models import Ema, EmaDocument
+from intervention.models import Intervention, Revocation, RevocationDocument, InterventionDocument
 from konova.contexts import BaseContext
-from konova.models import Document, BaseObject
+from konova.models import BaseObject
 from konova.utils.message_templates import FORM_INVALID
 from user.models import UserActionLogEntry, UserAction
 
@@ -307,7 +307,7 @@ class NewDocumentForm(BaseModalForm):
             attrs={
                 "class": "w-75"
             }
-        )
+        ),
     )
     comment = forms.CharField(
         required=False,
@@ -322,6 +322,13 @@ class NewDocumentForm(BaseModalForm):
             }
         )
     )
+    document_instance_map = {
+        Intervention: InterventionDocument,
+        Compensation: CompensationDocument,
+        EcoAccount: EcoAccountDocument,
+        Revocation: RevocationDocument,
+        Ema: EmaDocument,
+    }
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -331,6 +338,12 @@ class NewDocumentForm(BaseModalForm):
         self.form_attrs = {
             "enctype": "multipart/form-data",  # important for file upload
         }
+        self.document_type = self.document_instance_map.get(
+            self.instance.__class__,
+            None
+        )
+        if not self.document_type:
+            raise NotImplementedError("Unsupported document type for {}".format(self.instance.__class__))
 
     def save(self):
         with transaction.atomic():
@@ -338,14 +351,14 @@ class NewDocumentForm(BaseModalForm):
                 user=self.user,
                 action=UserAction.CREATED,
             )
-            doc = Document.objects.create(
+            doc = self.document_type.objects.create(
                 created=action,
                 title=self.cleaned_data["title"],
                 comment=self.cleaned_data["comment"],
                 file=self.cleaned_data["file"],
                 date_of_creation=self.cleaned_data["creation_date"],
+                instance=self.instance,
             )
-            self.instance.documents.add(doc)
 
             edited_action = UserActionLogEntry.objects.create(
                 user=self.user,