find() always returns empty list with Nested Model even though JSONModel is used (Silently)

[autolyticus]

Minimal example:

'''redis_storage.py'''
from redis_om import JsonModel, Field
from typing import Dict, Any, Optional

class ExperimentMetadata(JsonModel):
    class Meta:
        embedded = True

    factors: Dict[str, Any] = Field(default_factory=dict)
    results: Dict[str, Any] = Field(default_factory=dict)
    deployment_metadata: Dict[str, Any] = Field(default_factory=dict)
    dashboard_url: Optional[str] = None
    explore_url: Optional[str] = None

class Experiment(JsonModel):
    exp_name: str = Field(index=True)
    experiment_description: str = Field(default="", index=True)
    experiment_metadata: ExperimentMetadata = Field(default_factory=ExperimentMetadata)

class ExpStorage:
    @staticmethod
    def find_experiments_by_name(name: str) -> list[Experiment]:
        # Migrator().run()
        return Experiment.find(Experiment.exp_name == name).all()

'''test_redis_storage.py'''
import pytest
from os import getenv, environ
from pytest_docker_tools import container

redis = container(
    name="test-redis",
    image="redis/redis-stack:7.2.0-v13",
    ports={6379: 16379, 8001: 18001},
)

environ["REDIS_OM_URL"] = f"redis://localhost:16379/0"
from greenflow.redis_storage import Experiment, ExperimentMetadata, ExpStorage


@pytest.fixture
def storage(redis):
    from redis_om import get_redis_connection
    """Fixture for ExpStorage instance"""
    # Migrator().run()
    redis = get_redis_connection(url=getenv("REDIS_OM_URL"))

    load_gin(exp_name="test-platform", test=True)
    storage = ExpStorage()

    yield storage

    # Cleanup: Delete all keys after each test
    redis.flushdb()
    
class TestExpStorage:
    def test_find_experiments_by_name(self, storage):
        from redis_om import Migrator
        """Test finding experiments by name"""
        # Create multiple experiments
        exp1 = Experiment(exp_name="test1")
        exp1.save()

        exp2 = Experiment(exp_name="test2")
        exp2.save()
        Migrator().run()

        results = Experiment.find(Experiment.exp_name == "test1").all()

        assert len(results) == 1

When the test runs (and fails), I can see that the redis instance does have correct keys inserted. However, the assertion always fails as an empty list is returned.

I believe this is because ExperimentMetadata is a JsonModel. In fact, I tried changing it to a Dict[str, Any] and it still doesn't work and returns an empty list