serializers.ValidationError always returning str in 'detail'

[FelipeFranke5]

My apologies in advance for both the bad English and very noob question folks.
Hi there! I'm having trouble converting certain values from str to int, when raising serializers.ValidationError.

To be more specific, when raising serializers.ValidationError, I only add the "detail" param, passing a list of dictionaries (The key == str, and value == str | int), here is an example:

Note0: This is NOT the validate_.field. yet (Although, this function is running inside a validate and validate_.field._ method), I'm using a helper function, which is a "OpenAIActorAgeValidator" and "OpenAIActorNameValidator" class method.
Note1: I'm using OpenAI to perform some validations, in order to practice both usage of their API and serializer validations.

  def validate_reply(self, attrs: dict[str, Any]) -> None:
      if self.response is None:
          raise serializers.ValidationError(
              detail=[
                  {"code": "ai_empty_response"},
                  {"function": "validate_reply"},
                  {"message": "Error during Actor validation. Please, contact Admin for more info."},
              ]
          )
      reply = self.response.choices[0].message.content
      if reply is None:
          raise serializers.ValidationError(
              detail=[
                  {"code": "ai_reply_is_none"},
                  {"function": "validate_reply"},
                  {"message": "Error during Actor validation. Please, contact Admin for more info."},
              ]
          )
      actor_age = str(attrs["age"])
      correct_age = int(reply)
      if actor_age not in reply:
          raise serializers.ValidationError(
              detail=[
                  {"code": "invalid_age"},
                  {"function": "validate_reply"},
                  {"message": "Please correct the Actor age."},
                  {"correct_age_or_response": correct_age},
              ]
          )

Basically, first I retrieve and convert the actor_age as a str and the chatbot response as a int, using separate variables. If ValidationError is raised, I point the "correct_age_or_response" to the int converted correct age variable (I called it or_response because OpenAI may return a different output than simply the age, I'll deal with that issue later..)

But after doing some tests, it seems like ValidationError is converting the variable back to str:

HTTP 400 Bad Request
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "code": 1,
    "returnCode": 0,
    "returnMessage": "Could not create Actor.",
    "errors": {
        "nonFieldErrors": [
            {
                "code": "invalid_age"
            },
            {
                "function": "validate_reply"
            },
            {
                "message": "Please correct the Actor age."
            },
            {
                "correctAgeOrResponse": "50"
            }
        ]
    }
}

Is that the default behaviour for dictionaries in this case? I tried changing the variable to make sure it is in fact a int, and this only happens when raising ValidationError.

Thanks !!