NestedMutableJson to dict

[irux]

Hi. I would like to cast the NestedMutableJson to dict.

What can be the best solution for this problem ?

thank you

[edelooff]

Not sure exactly at which point you want to do this. At the Python side, the data is, in most cases, already a dict.

If it's data going into the database that should be a dict, that sounds like a validation problem, which can either be tackled at the SQLAlchemy level using something like sqlalchemy.orm.validates, or a more comprehensive validation library like marshmallow.

If it's about data coming out of the database that ought to be a dict, you could create a subclass of the NestedMutableJson which overrides the process_result_value method to force whatever isn't a dict into a dict. That's going to be a rather application-specific pattern, because the key under which the value goes is rather arbitrary. Something like this might provide a start:

class ForceDictNestedJson(NestedMutableJson):
    def process_result_value(value, dialect):
        value = super(ForceDictNestedJson, self).process_result_value(value, dialect)
        if not isinstance(value, dict):
            return {'_dict_wrapper': value}
        return value

[edelooff]

If there's an issue here that ought to be resolved by sqlalchemy-json, please update.