Get running with Python 3.11

core/dbt/adapters/base/relation.py

@@ -1,5 +1,5 @@
 from collections.abc import Hashable
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from typing import Optional, TypeVar, Any, Type, Dict, Union, Iterator, Tuple, Set
 
 from dbt.contracts.graph.compiled import CompiledNode
@@ -27,8 +27,10 @@ class BaseRelation(FakeAPIObject, Hashable):
     path: Path
     type: Optional[RelationType] = None
     quote_character: str = '"'
-    include_policy: Policy = Policy()
-    quote_policy: Policy = Policy()
+    # Python 3.11 requires that these use default_factory instead of simple default
+    # ValueError: mutable default <class 'dbt.contracts.relation.Policy'> for field include_policy is not allowed: use default_factory
+    include_policy: Policy = field(default_factory=Policy)
+    quote_policy: Policy = field(default_factory=Policy)
     dbt_created: bool = False
 
     def _is_exactish_match(self, field: ComponentName, value: str) -> bool:
@@ -52,11 +54,11 @@ def __eq__(self, other):
 
     @classmethod
     def get_default_quote_policy(cls) -> Policy:
-        return cls._get_field_named("quote_policy").default
+        return cls._get_field_named("quote_policy").default_factory
 
     @classmethod
     def get_default_include_policy(cls) -> Policy:
-        return cls._get_field_named("include_policy").default
+        return cls._get_field_named("include_policy").default_factory
 
     def get(self, key, default=None):
         """Override `.get` to return a metadata object so we don't break
@@ -188,7 +190,7 @@ def create_from_source(cls: Type[Self], source: ParsedSourceDefinition, **kwargs
         source_quoting = source.quoting.to_dict(omit_none=True)
         source_quoting.pop("column", None)
         quote_policy = deep_merge(
-            cls.get_default_quote_policy().to_dict(omit_none=True),
+            cls.get_default_quote_policy()().to_dict(omit_none=True),  # mypy doesn't like this
             source_quoting,
             kwargs.get("quote_policy", {}),
         )

core/dbt/config/runtime.py

@@ -69,7 +69,7 @@ def from_parts(
         """
         quoting: Dict[str, Any] = (
             get_relation_class_by_name(profile.credentials.type)
-            .get_default_quote_policy()
+            .get_default_quote_policy()()  # mypy doesn't like this
             .replace_dict(_project_quoting_dict(project, profile))
         ).to_dict(omit_none=True)
 

core/dbt/contracts/project.py

@@ -218,7 +218,7 @@ class Project(HyphenatedDbtClassMixin, Replaceable):
         ),
     )
     packages: List[PackageSpec] = field(default_factory=list)
-    query_comment: Optional[Union[QueryComment, NoValue, str]] = NoValue()
+    query_comment: Optional[Union[QueryComment, NoValue, str]] = field(default_factory=NoValue)
 
     @classmethod
     def validate(cls, data):

core/dbt/helper_types.py

@@ -3,7 +3,7 @@
 # necessary for annotating constructors
 from __future__ import annotations
 
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from datetime import timedelta
 from pathlib import Path
 from typing import Tuple, AbstractSet, Union
@@ -80,12 +80,15 @@ class NVEnum(StrEnum):
     def __eq__(self, other):
         return isinstance(other, NVEnum)
 
+    def __call__(self):
+        return self.novalue
+
 
 @dataclass
 class NoValue(dbtClassMixin):
     """Sometimes, you want a way to say none that isn't None"""
 
-    novalue: NVEnum = NVEnum.novalue
+    novalue: NVEnum = field(default_factory=NVEnum.novalue)
 
 
 dbtClassMixin.register_field_encoders(

core/setup.py

@@ -54,7 +54,7 @@
         "hologram>=0.0.14,<=0.0.15",
         "isodate>=0.6,<0.7",
         "logbook>=1.5,<1.6",
-        "mashumaro[msgpack]==3.0.4",
+        "mashumaro[msgpack]==3.1",
         "minimal-snowplow-tracker==0.0.2",
         "networkx>=2.3,<2.8.1;python_version<'3.8'",
         "networkx>=2.3,<3;python_version>='3.8'",
@@ -81,6 +81,7 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
     ],
     python_requires=">=3.7.2",
 )