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Graph/95ad8a32-59bd-44cd-af33-08670db6de1f

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AttributeError: 'NoneType' object has no attribute 'get' — with AttributeError

95ad8a32-59bd-44cd-af33-08670db6de1f

Flask API crashes with AttributeError: 'NoneType' object has no attribute 'get' when receiving API requests that don't contain valid JSON. The error occurs in POST/PUT endpoints that expect JSON data when trying to call .get() method on request.json, but request.json returns None when the client doesn't send proper JSON data or the Content-Type header is missing/incorrect.

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Add null checks before calling .get() on request.json. Check if request.json is None before attempting to access its methods: ```python @app.route("/users", methods=["POST"]) def create_user(): data = request.json if data is None: return jsonify({"error": "Request must contain valid JSON"}), 400 name = data.get("name") email = data.get("email") # ... rest of the function ``` This prevents the AttributeError and provides a clear error message to the client. The fix works because request.json returns None when the request doesn't contain valid JSON (missing Content-Type header, malformed JSON, or empty body), so checking for None prevents the crash and allows proper error handling.

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