#18 File upload in certain folders

* adds try-except for removing folders in case of non existence or changed folder names on the hard drive

intervention/models.py

@@ -122,12 +122,19 @@ class RevocationDocument(AbstractDocument):
 
         # Always remove 'revocation' folder
         folder_path = self.file.path.split("/")
-        shutil.rmtree("/".join(folder_path[:-1]))
+        try:
+            shutil.rmtree("/".join(folder_path[:-1]))
+        except FileNotFoundError:
+            # Revocation subfolder seems to be missing already
+            pass
 
         if other_intervention_docs.count() == 0:
             # If there are no further documents for the intervention, we can simply remove the whole folder as well!
-            shutil.rmtree("/".join(folder_path[:-2]))
-
+            try:
+                shutil.rmtree("/".join(folder_path[:-2]))
+            except FileNotFoundError:
+                # Folder seems to be missing already
+                pass
 
 class LegalData(UuidModel):
     """
@@ -415,5 +422,8 @@ class InterventionDocument(AbstractDocument):
 
         # If a folder path has been set, we need to delete the whole folder!
         if folder_path is not None:
-            shutil.rmtree(folder_path)
-
+            try:
+                shutil.rmtree(folder_path)
+            except FileNotFoundError:
+                # Folder seems to be missing already...
+                pass