#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

compensation/models.py

@@ -14,7 +14,8 @@ from django.utils.translation import gettext_lazy as _
 from codelist.models import KonovaCode
 from codelist.settings import CODELIST_COMPENSATION_ACTION_ID, CODELIST_BIOTOPES_ID
 from intervention.models import Intervention, ResponsibilityData
-from konova.models import BaseObject, BaseResource, Geometry, UuidModel
+from konova.models import BaseObject, BaseResource, Geometry, UuidModel, AbstractDocument, \
+    generate_document_file_upload_path
 from konova.settings import DEFAULT_SRID_RLP, LANIS_LINK_TEMPLATE
 from user.models import UserActionLogEntry
 
@@ -137,7 +138,6 @@ class AbstractCompensation(BaseObject):
     deadlines = models.ManyToManyField("konova.Deadline", blank=True, related_name="+")
 
     geometry = models.ForeignKey(Geometry, null=True, blank=True, on_delete=models.SET_NULL)
-    documents = models.ManyToManyField("konova.Document", blank=True)
 
     class Meta:
         abstract = True
@@ -198,6 +198,20 @@ class Compensation(AbstractCompensation):
         )
 
 
+class CompensationDocument(AbstractDocument):
+    """
+    Specializes document upload for revocations with certain path
+    """
+    instance = models.ForeignKey(
+        Compensation,
+        on_delete=models.CASCADE,
+        related_name="documents",
+    )
+    file = models.FileField(
+        upload_to=generate_document_file_upload_path
+    )
+
+
 class EcoAccount(AbstractCompensation):
     """
     An eco account is a kind of 'prepaid' compensation. It can be compared to an account that already has been filled
@@ -299,6 +313,20 @@ class EcoAccount(AbstractCompensation):
         return ret_msgs
 
 
+class EcoAccountDocument(AbstractDocument):
+    """
+    Specializes document upload for revocations with certain path
+    """
+    instance = models.ForeignKey(
+        EcoAccount,
+        on_delete=models.CASCADE,
+        related_name="documents",
+    )
+    file = models.FileField(
+        upload_to=generate_document_file_upload_path
+    )
+
+
 class EcoAccountDeduction(BaseResource):
     """
     A deduction object for eco accounts