fix: pydantic ^2.9.0 needs 2 extra fields on to_argument (#3632)

* fix: pydantic ^2.9.0 needs 2 extra fields on to_argument

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* docs: add RELEASE.md file

* Update .alexrc to allow crash

* Update RELEASE.md

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Patrick Arminio <[email protected]>

Author: 3 people

.alexrc

@@ -11,6 +11,7 @@
     "execution",
     "special",
     "primitive",
-    "invalid"
+    "invalid",
+    "crash",
   ]
 }

RELEASE.md

@@ -0,0 +1,3 @@
+Release type: patch
+
+This releases adds support for Pydantic 2.9.0's Mypy plugin

strawberry/ext/mypy_plugin.py

@@ -481,7 +481,14 @@ def strawberry_pydantic_class_callback(ctx: ClassDefContext) -> None:
                         # Based on pydantic's default value
                         # https://github.com/pydantic/pydantic/pull/9606/files#diff-469037bbe55bbf9aa359480a16040d368c676adad736e133fb07e5e20d6ac523R1066
                         extra["force_typevars_invariant"] = False
-
+                    if PYDANTIC_VERSION >= (2, 9, 0):
+                        extra["model_strict"] = model_type.type.metadata[
+                            PYDANTIC_METADATA_KEY
+                        ]["config"].get("strict", False)
+                        extra["is_root_model_root"] = any(
+                            "pydantic.root_model.RootModel" in base.fullname
+                            for base in model_type.type.mro[:-1]
+                        )
                 add_method(
                     ctx,
                     "to_pydantic",