#18 File upload in certain folders

* removes document file folder if the last EcoAccountDocument is removed from an eco account

compensation/models.py

@@ -355,6 +355,17 @@ class EcoAccount(AbstractCompensation):
 
         return ret_msgs
 
+    def get_documents(self) -> QuerySet:
+        """ Getter for all documents of an EcoAccount
+
+        Returns:
+            docs (QuerySet): The queryset of all documents
+        """
+        docs = EcoAccountDocument.objects.filter(
+            instance=self
+        )
+        return docs
+
 
 class EcoAccountDocument(AbstractDocument):
     """
@@ -370,6 +381,35 @@ class EcoAccountDocument(AbstractDocument):
         max_length=1000,
     )
 
+    def delete(self, *args, **kwargs):
+        """
+        Custom delete functionality for EcoAccountDocuments.
+        Removes the folder from the file system if there are no further documents for this entry.
+
+        Args:
+            *args ():
+            **kwargs ():
+
+        Returns:
+
+        """
+        acc_docs = self.instance.get_documents()
+
+        folder_path = None
+        if acc_docs.count() == 1:
+            # The only file left for this eco account is the one which is currently processed and will be deleted
+            # Make sure that the compensation folder itself is deleted as well, not only the file
+            # Therefore take the folder path from the file path
+            folder_path = self.file.path.split("/")[:-1]
+            folder_path = "/".join(folder_path)
+
+        # Remove the file itself
+        super().delete(*args, **kwargs)
+
+        # If a folder path has been set, we need to delete the whole folder!
+        if folder_path is not None:
+            shutil.rmtree(folder_path)
+
 
 class EcoAccountDeduction(BaseResource):
     """