list[list[tuple[str, BaseModel]]] not loading after save

[andreish]

Hi ,
I have following model :

class Detection(BaseModel):
    bbox : list[int]
    other_bbox :list[int] | None = None

class InferenceResult(BaseModel):
    pgn: str
    detections : list[Detection]

class RegressionResults(BaseModel):
    id : ObjectIdField| None = None
    job_url : str | None = None
    branch : str
    commit_sha : str
    baseline: bool | None = False
    created_date : str| None = None
    inference_results: list[list[tuple[str,InferenceResult]]]

...

class RegressionResultsRepository(AbstractRepository[RegressionResults]):
    class Meta:
        collection_name = 'results'

calling repo.save works but
repo.find_one_by({"commit_sha":commit_sha}) raise:

   File "/srv/.venv/lib/python3.12/site-packages/pydantic_mongo/abstract_repository.py", line 99, in to_model_custom
     return output_type.model_validate(data_copy)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/srv/.venv/lib/python3.12/site-packages/pydantic/main.py", line 509, in model_validate
     return cls.__pydantic_validator__.validate_python(
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 pydantic_core._pydantic_core.ValidationError: 1 validation error for RegressionResults
 inference_results.0
   Input should be a valid list [type=list_type, input_value={'pgn': '1. e4 e5 2. Nf3 ...diction_pos_to': 'd8'}]}, input_type=dict]

looking at what mongo gives back when calling pymongo api :

collection.find_one({"commit_sha":commit_sha})

one={
     "_id": "65f95571d1c5642ed4a486ce",
     "baseline": false,
     "branch": "test",
     "commit_sha": "abcdefgh",
     "created_date": "2024-03-19T09:05:53.198436+00:00",
     "inference_results": [
         {
             "detections": [
                 {
                     "bbox": [
                         195,
                         81,
                         193,

I was expecting to see :

one={
     "_id": "65f95571d1c5642ed4a486ce",
     "baseline": false,
     "branch": "test",
     "commit_sha": "abcdefgh",
     "created_date": "2024-03-19T09:05:53.198436+00:00",
     "inference_results": [  //list
         [ //list
             [ //tuple
              { //InferenceResult
             "detections": [
                 {
                     "bbox": [
                         195,
                         81,
                         193,

Any idea on why this behaviour and how to fix?

using pydantic==2.6.4
pydantic-mongo==2.1.2
pydantic_core==2.16.3
pymongo==4.6.2

mongo runs in docker with image mongo:7.0.7-jammy

[andreish]

Fixed after dropping mongo data and restarted testing , possibly some itermediate model version was saved.