Update to Pydantic V2 (#588)

* Pydantic V2 support

* Support Python 3.8

* Mark as classmethod

* Remove max int validation

* Run poe format

* Merge develop

* Revert dataclasses import

* Fix revert

Author: gatesn

poetry.lock

@@ -39,7 +39,7 @@ pytest = "^6.2.5"
 pytest-asyncio = "^0.12.0"
 pytest-cov = "^2.9.0"
 pytest-mock = "^3.1.1"
-pydantic = ">=1.10.16,<2"
+pydantic = ">=2.0,<3"
 protobuf = "^4"
 cachelib = "^0.10.2"
 tomlkit = ">=0.7.0"

pyproject.toml

@@ -1852,7 +1852,9 @@ def _validate_field_groups(cls, values):
                     continue
 
             set_fields = [
-                field.name for field in field_set if values[field.name] is not None
+                field.name
+                for field in field_set
+                if getattr(values, field.name, None) is not None
             ]
 
             if not set_fields: