better error handling on submit form

evidence/forms.py

@@ -35,12 +35,14 @@ class UploadForm(forms.Form):
                 ).first()
 
                 if exist_annotation:
-                    raise ValidationError("error: {} exist".format(file_name))
+                    raise ValidationError("Error! Snapshot: {} already exists".format(file_name))
 
-            except ValueError:
+            except json.JSONDecodeError:
-                raise ValidationError("Error in parsing JSON: {}. Check for file corruption.".format(file_name))
+                raise ValidationError("Error in parsing JSON: '{}'. Check for file integrity.".format(file_name))
-            except Exception:
+            except ValidationError as e:
-                raise ValidationError("error in: {}".format(file_name))
+                raise e
+            except Exception as e:
+                raise ValidationError("Oops! Something went wrong in '{}': {}".format(file_name, str(e)))
 
             self.evidences.append((file_name, file_json))
 

evidence/management/commands/up_snapshots.py

@@ -53,13 +53,15 @@ class Command(BaseCommand):
             with open(filepath, 'r') as file:
                 content = json.loads(file.read())
                 path_name = save_in_disk(content, self.user.institution.name)
+
                 self.snapshots.append((content, path_name))
-        except json.JSONDecodeError:
+        except json.JSONDecodeError as e:
-            raise ValueError(f"Invalid JSON format in file {filepath}.")
+            raise e
         #or we cath'em all
-        except Exception as e:
+        except Exception:
             raise Exception(f"Oops! Something went wrong there")
 
+
     def parsing(self):
         for s, p in self.snapshots:
             try: