How to Efficiently Convert SQLAlchemy Query Results to JSON?

Convert SQLAlchemy Query Result to JSON

Serializing SQLAlchemy query results to JSON can be a challenge, especially without automatic serialization like in Django ORM models. To overcome this, one can create a custom JSON serializer or use an existing library.

One approach is to manually define the serialization process by creating a to_dict() method within the model class:

class User:
    def to_dict(self):
        return {c.name: getattr(self, c.name) for c in self.__table__.columns}

This function converts the model instance into a dictionary, which can then be easily converted to JSON.

Another option is to leverage an object serialization library like jsonpickle. However, it's important to note that jsonpickle.encode() encodes the query object itself. Instead, use jsonpickle.encode(item.to_dict()) after converting the model to a dictionary.

Additionally, using json.dumps(items) will result in a TypeError because SQLAlchemy objects are not natively JSON serializable. The to_dict() method ensures that the objects are converted into a dictionary format that is suitable for JSON serialization.

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