Better exception handling in json-routes

app/contributions/routes.py

@@ -117,21 +117,37 @@ def spacy_nlp_pipeline_model(spacy_nlp_pipeline_model_id):
 def delete_spacy_model(spacy_nlp_pipeline_model_id):
     def _delete_spacy_model(app, spacy_nlp_pipeline_model_id):
         with app.app_context():
-            spacy_nlp_pipeline_model = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
+            snpm = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
-            spacy_nlp_pipeline_model.delete()
+            snpm.delete()
             db.session.commit()
     
-    snpm = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
+    snpm = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
+    if snpm is None:
+        resonse_data = {
+            'message': f'"{snpm.title}" not found',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 404
+        return response
     if not (snpm.user == current_user or current_user.is_administrator()):
-        abort(403)
+        resonse_data = {
+            'message': f'You are not allowed to delete "{snpm.title}"',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 403
+        return response
     thread = Thread(
         target=_delete_spacy_model,
-        args=(current_app._get_current_object(), spacy_nlp_pipeline_model_id)
+        args=(current_app._get_current_object(), snpm.id)
     )
     thread.start()
-    response = jsonify(
+    resonse_data = {
-        f'SpaCy NLP Pipeline Model "{snpm.title}" marked for deletion'
+        'message': \
-    )
+            f'SpaCy NLP Pipeline Model "{snpm.title}" marked for deletion'
+    }
+    response = jsonify(resonse_data)
     response.status_code = 202
     return response
 
@@ -143,16 +159,39 @@ def delete_spacy_model(spacy_nlp_pipeline_model_id):
 def update_spacy_nlp_pipeline_model_is_public(spacy_nlp_pipeline_model_id):
     is_public = request.json
     if not isinstance(is_public, bool):
-        abort(400)
+        resonse_data = {
-    snpm = SpaCyNLPPipelineModel.query.get_or_404(spacy_nlp_pipeline_model_id)
+            'message': 'Request body must be a boolean',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 400
+        return response
+    snpm = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
+    if snpm is None:
+        resonse_data = {
+            'message': f'"{snpm.title}" not found',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 404
+        return response
     if not (snpm.user == current_user or current_user.is_administrator()):
-        abort(403)
+        resonse_data = {
+            'message': f'You are not allowed to delete "{snpm.title}"',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 403
+        return response
     snpm.is_public = is_public
     db.session.commit()
-    response = jsonify(
+    response_data = {
-        f'SpaCy NLP Pipeline Model "{snpm.title}"'
+        'message': (
-        f' is now {"public" if is_public else "private"}'
+            f'SpaCy NLP Pipeline Model "{snpm.title}"'
-    )
+            f' is now {"public" if is_public else "private"}'
+        )
+    }
+    response = jsonify(response_data)
     response.status_code = 200
     return response
 #endregion json-routes
@@ -237,22 +276,38 @@ def tesseract_ocr_pipeline_model(tesseract_ocr_pipeline_model_id):
 def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
     def _delete_tesseract_ocr_pipeline_model(app, tesseract_ocr_pipeline_model_id):
         with app.app_context():
-            tesseract_ocr_pipeline_model = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
+            topm = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
-            tesseract_ocr_pipeline_model.delete()
+            topm.delete()
             db.session.commit()
 
-    topm = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
+    topm = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
+    if topm is None:
+        resonse_data = {
+            'message': f'"{topm.title}" not found',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 404
+        return response
     if not (topm.user == current_user or current_user.is_administrator()):
-        abort(403)
+        resonse_data = {
+            'message': f'You are not allowed to delete "{topm.title}"',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 403
+        return response
     thread = Thread(
         target=_delete_tesseract_ocr_pipeline_model,
-        args=(current_app._get_current_object(), tesseract_ocr_pipeline_model_id)
+        args=(current_app._get_current_object(), topm.id)
     )
     thread.start()
-    response = jsonify(
+    resonse_data = {
-        f'Tesseract OCR Pipeline Model "{topm.title}" marked for deletion'
+        'message': \
-    )
+            f'Tesseract OCR Pipeline Model "{topm.title}" marked for deletion'
-    response.status_code = 200
+    }
+    response = jsonify(resonse_data)
+    response.status_code = 202
     return response
 
 
@@ -263,16 +318,39 @@ def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
 def update_tesseract_ocr_pipeline_model_is_public(tesseract_ocr_pipeline_model_id):
     is_public = request.json
     if not isinstance(is_public, bool):
-        abort(400)
+        resonse_data = {
-    topm = TesseractOCRPipelineModel.query.get_or_404(tesseract_ocr_pipeline_model_id)
+            'message': 'Request body must be a boolean',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 400
+        return response
+    topm = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
+    if topm is None:
+        resonse_data = {
+            'message': f'"{topm.title}" not found',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 404
+        return response
     if not (topm.user == current_user or current_user.is_administrator()):
-        abort(403)
+        resonse_data = {
+            'message': f'You are not allowed to delete "{topm.title}"',
+            'category': 'error'
+        }
+        response = jsonify(resonse_data)
+        response.status_code = 403
+        return response
     topm.is_public = is_public
     db.session.commit()
-    response = jsonify(
+    response_data = {
-        f'Tesseract OCR Pipeline Model "{topm.title}"'
+        'message': (
-        f' is now {"public" if is_public else "private"}'
+            f'Tesseract OCR Pipeline Model "{topm.title}"'
-    )
+            f' is now {"public" if is_public else "private"}'
+        )
+    }
+    response = jsonify(response_data)
     response.status_code = 200
     return response
 #endregion json-routes