Field metadata ignored when calling the dump function

[luisboscan]

I have an issue where the dump function seems to be ignoring the metadata configuration altogether.

The Python class:

@dataclass_json(letter_case=LetterCase.CAMEL)
@dataclass(frozen=True)
class InvoicePaymentsResponse:
    payment_id: str
    payment_status: Payment.Status
    invoice_id: str
    invoice_amount_to_pay: Money = field(metadata=money_metadata)
    invoice_payment_status: Invoice.Status

The metadata config, which encodes the money object to a dict (this is not dataclass_json's to_dict function):

money_metadata = config(
    encoder=lambda value: value.to_dict()
)

How I initialize it:

        return InvoicePaymentsResponse(
            payment_id=row[InvoicePaymentModel.payment_id],
            payment_status=Payment.Status(row[PaymentModel.status]),
            invoice_id=row[InvoicePaymentModel.invoice_id],
            invoice_amount_to_pay=Money.from_dict(row[InvoicePaymentModel.invoice_amount]),
            invoice_payment_status=Invoice.Status(row[InvoiceModel.status]),
        )

And finally, when I want to convert invoice_payments (List of InvoicePaymentsResponse) to a list of dict:

response_body = InvoicePaymentsResponse.schema().dump(invoice_payments, many=True)

The result is a list of Python dicts where all other fields have been correctly encoded except invoiceAmountToPay, this field appears with the correct name but still a Money object inside.

If I were to call InvoicePaymentsResponse.to_dict instead, the Money field gets encoded correctly as per the metadata configuration.

I could not figure out why the behaviour was different between to_dict and dump.

This is on version 0.5.4.

[krispharper]

Is there any update on this? I'm running into the same issue. Here's my example.

from dataclasses import dataclass, field
from datetime import datetime

from dataclasses_json import config, dataclass_json, LetterCase
from dateutil.parser import parse
from marshmallow import fields


@dataclass_json(letter_case=LetterCase.CAMEL)
@dataclass
class Test:
    created_at: datetime = field(
        metadata=config(
            decoder=parse,
            mm_field=fields.DateTime(format='iso')
        )
    )


if __name__ == "__main__":
    test1 = Test.from_json('{"createdAt":  "2022-02-05T15:00:36Z"}')
    print(test1)  # Works fine
    test2 = Test.schema().loads('[{"createdAt":  "2022-02-05T15:00:36Z"}]', many=True)
    print(test2)  # Results in "unknown field, createdAt"

[nft-tlee]

I have the same issue @krispharper
and still not yet fixed for letter_case=LetterCase.CAMEL to handle list json data