Pydantic validation error when using dicts content in user message

[off6atomic]

Description

I ran the following code:

import pprint

from mirascope.openai import OpenAICall
from openai.types.chat import ChatCompletionMessageParam


class Librarian(OpenAICall):
    prompt_template = """
    SYSTEM: You are the world's greatest librarian.
    MESSAGES: {history}
    """

    history: list[ChatCompletionMessageParam] = []


history = [
    {
        "role": "user",
        "content": [{"type": "text", "text": "What fantasy book should I read?"}],
    },
]
librarian = Librarian(history=history)
pprint.pprint(librarian.messages(), indent=2)

And got this message:

[ {'content': "You are the world's greatest librarian.", 'role': 'system'},
  { 'content': ValidatorIterator(index=0, schema=Some(Union(UnionValidator { mode: Smart, choices: [(TypedDict(TypedDictValidator { fields: [TypedDictField { name: "text", lookup_key: Simple { key: "text", py_key: Py(0x117aa4fb0), path: LookupPath([S("text", Py(0x1179e4af0))]) }, name_py: Py(0x104520b70), required: true, validator: Str(StrValidator { strict: false, coerce_numbers_to_str: false }) }, TypedDictField { name: "type", lookup_key: Simple { key: "type", py_key: Py(0x1179e4db0), path: LookupPath([S("type", Py(0x1179e52f0))]) }, name_py: Py(0x104500d70), required: true, validator: Literal(LiteralValidator { lookup: LiteralLookup { expected_bool: None, expected_int: None, expected_str: Some({"text": 0}), expected_py_dict: None, expected_py_list: None, values: [Py(0x104520b70)] }, expected_repr: "'text'", name: "literal['text']" }) }], extra_behavior: Ignore, extras_validator: None, strict: false, loc_by_alias: true }), None), (TypedDict(TypedDictValidator { fields: [TypedDictField { name: "image_url", lookup_key: Simple { key: "image_url", py_key: Py(0x117ac8b70), path: LookupPath([S("image_url", Py(0x117ac8bb0))]) }, name_py: Py(0x1168f7db0), required: true, validator: TypedDict(TypedDictValidator { fields: [TypedDictField { name: "url", lookup_key: Simple { key: "url", py_key: Py(0x1179f44f0), path: LookupPath([S("url", Py(0x117ac8ab0))]) }, name_py: Py(0x104728970), required: true, validator: Str(StrValidator { strict: false, coerce_numbers_to_str: false }) }, TypedDictField { name: "detail", lookup_key: Simple { key: "detail", py_key: Py(0x117ac8af0), path: LookupPath([S("detail", Py(0x117ac8b30))]) }, name_py: Py(0x107828530), required: false, validator: Literal(LiteralValidator { lookup: LiteralLookup { expected_bool: None, expected_int: None, expected_str: Some({"high": 2, "auto": 0, "low": 1}), expected_py_dict: None, expected_py_list: None, values: [Py(0x1046a95f0), Py(0x1049f0f70), Py(0x1049f0fb0)] }, expected_repr: "'auto', 'low' or 'high'", name: "literal['auto','low','high']" }) }], extra_behavior: Ignore, extras_validator: None, strict: false, loc_by_alias: true }) }, TypedDictField { name: "type", lookup_key: Simple { key: "type", py_key: Py(0x117ac8bf0), path: LookupPath([S("type", Py(0x117ac8c30))]) }, name_py: Py(0x104500d70), required: true, validator: Literal(LiteralValidator { lookup: LiteralLookup { expected_bool: None, expected_int: None, expected_str: Some({"image_url": 0}), expected_py_dict: None, expected_py_list: None, values: [Py(0x1168f7db0)] }, expected_repr: "'image_url'", name: "literal['image_url']" }) }], extra_behavior: Ignore, extras_validator: None, strict: false, loc_by_alias: true }), None)], custom_error: None, strict: false, name: "union[typed-dict,typed-dict]" }))),
    'role': 'user'}]

Notice the ValidatorIterator stuff. It should not be there, is it?

I strongly believe that this is the culprit that causes logging with Logfire to not show Chat Completion section.

By Chat Completion section, I mean the pretty log like in the following image:

Debugging tips

• If you change the content field to be a string instead of a list of dicts, then there would be no validation error.
• Try using with_logfire decorator to wrap the Librarian class to see Chat Completion section disappearing when the content is a list of dicts

Python, Mirascope & OS Versions, related packages (not required)

mirascope=0.17.0
pydantic==2.7.1
python=3.10.11
os=Mac