diff --git a/CHANGES.rst b/CHANGES.rst
index 96623d9a..959634c0 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,11 @@
 Version history
 ===============
 
+**UNRELEASED**
+
+- Handle SQLAlchemy type with unimplemented python_type as typing.Any (PR by @danplischke)
+- Fix SQLModel metadata reference (PR by @danplischke)
+
 **3.1.0**
 
 - Type annotations for ARRAY column attributes now include the Python type of
diff --git a/src/sqlacodegen/generators.py b/src/sqlacodegen/generators.py
index 7b4901a7..db4fba0f 100644
--- a/src/sqlacodegen/generators.py
+++ b/src/sqlacodegen/generators.py
@@ -1243,9 +1243,18 @@ def render_python_type(column_type: TypeEngine[Any]) -> str:
             if isinstance(column_type, DOMAIN):
                 python_type = column_type.data_type.python_type
             else:
-                python_type = column_type.python_type
+                try:
+                    python_type = column_type.python_type
+                except NotImplementedError:
+                    self.add_literal_import("typing", "Any")
+                    python_type = Any
+
+            python_type_name = (
+                python_type.__name__
+                if hasattr(python_type, "__name__")
+                else python_type._name
+            )
 
-            python_type_name = python_type.__name__
             python_type_module = python_type.__module__
             if python_type_module == "builtins":
                 return python_type_name
@@ -1435,7 +1444,7 @@ def generate_base(self) -> None:
         self.base = Base(
             literal_imports=[],
             declarations=[],
-            metadata_ref="",
+            metadata_ref="SQLModel.metadata",
         )
 
     def collect_imports(self, models: Iterable[Model]) -> None:
diff --git a/tests/test_generator_dataclass.py b/tests/test_generator_dataclass.py
index 307f865c..afec050f 100644
--- a/tests/test_generator_dataclass.py
+++ b/tests/test_generator_dataclass.py
@@ -2,7 +2,7 @@
 
 import pytest
 from _pytest.fixtures import FixtureRequest
-from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.dialects.postgresql import TSVECTOR, UUID
 from sqlalchemy.engine import Engine
 from sqlalchemy.schema import Column, ForeignKeyConstraint, MetaData, Table
 from sqlalchemy.sql.expression import text
@@ -267,3 +267,35 @@ class Simple(Base):
             id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True)
         """,
     )
+
+
+def test_tsvector_missing_python_type(generator: CodeGenerator) -> None:
+    Table(
+        "simple_tsvector",
+        generator.metadata,
+        Column("id", UUID, primary_key=True),
+        Column("vector", TSVECTOR),
+    )
+
+    validate_code(
+        generator.generate(),
+        """\
+        from typing import Any, Optional
+        import typing
+        import uuid
+
+        from sqlalchemy import UUID
+        from sqlalchemy.dialects.postgresql import TSVECTOR
+        from sqlalchemy.orm import DeclarativeBase, Mapped, MappedAsDataclass, mapped_column
+
+        class Base(MappedAsDataclass, DeclarativeBase):
+            pass
+
+
+        class SimpleTsvector(Base):
+            __tablename__ = 'simple_tsvector'
+
+            id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True)
+            vector: Mapped[Optional[typing.Any]] = mapped_column(TSVECTOR)
+        """,
+    )
diff --git a/tests/test_generator_declarative.py b/tests/test_generator_declarative.py
index 931d5965..97b4a4eb 100644
--- a/tests/test_generator_declarative.py
+++ b/tests/test_generator_declarative.py
@@ -4,7 +4,7 @@
 from _pytest.fixtures import FixtureRequest
 from sqlalchemy import BIGINT, PrimaryKeyConstraint
 from sqlalchemy.dialects import postgresql
-from sqlalchemy.dialects.postgresql import JSON, JSONB
+from sqlalchemy.dialects.postgresql import JSON, JSONB, TSVECTOR
 from sqlalchemy.engine import Engine
 from sqlalchemy.schema import (
     CheckConstraint,
@@ -1706,3 +1706,34 @@ class TestDomainJson(Base):
     foo: Mapped[Optional[dict]] = mapped_column(DOMAIN('domain_json', {domain_type.__name__}(astext_type=Text(length=128)), not_null=False))
 """,
     )
+
+
+def test_tsvector_missing_python_type(generator: CodeGenerator) -> None:
+    Table(
+        "test_tsvector",
+        generator.metadata,
+        Column("id", BIGINT, primary_key=True),
+        Column("vector", TSVECTOR()),
+    )
+
+    validate_code(
+        generator.generate(),
+        """\
+        from typing import Any, Optional
+        import typing
+
+        from sqlalchemy import BigInteger
+        from sqlalchemy.dialects.postgresql import TSVECTOR
+        from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+
+        class Base(DeclarativeBase):
+            pass
+
+
+        class TestTsvector(Base):
+            __tablename__ = 'test_tsvector'
+
+            id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
+            vector: Mapped[Optional[typing.Any]] = mapped_column(TSVECTOR)
+        """,
+    )
diff --git a/tests/test_generator_sqlmodel.py b/tests/test_generator_sqlmodel.py
index 32a736e2..f5b72837 100644
--- a/tests/test_generator_sqlmodel.py
+++ b/tests/test_generator_sqlmodel.py
@@ -3,6 +3,7 @@
 import pytest
 from _pytest.fixtures import FixtureRequest
 from sqlalchemy import Uuid
+from sqlalchemy.dialects.postgresql import TSVECTOR
 from sqlalchemy.engine import Engine
 from sqlalchemy.schema import (
     CheckConstraint,
@@ -204,3 +205,61 @@ class SimpleUuid(SQLModel, table=True):
                 id: uuid.UUID = Field(sa_column=Column('id', Uuid, primary_key=True))
         """,
     )
+
+
+def test_tsvector_missing_python_type(generator: CodeGenerator) -> None:
+    Table(
+        "simple_tsvector",
+        generator.metadata,
+        Column("id", Uuid, primary_key=True),
+        Column("search", TSVECTOR),
+    )
+
+    validate_code(
+        generator.generate(),
+        """\
+        from typing import Any, Optional
+        import typing
+        import uuid
+
+        from sqlalchemy import Column, Uuid
+        from sqlalchemy.dialects.postgresql import TSVECTOR
+        from sqlmodel import Field, SQLModel
+
+        class SimpleTsvector(SQLModel, table=True):
+            __tablename__ = 'simple_tsvector'
+
+            id: uuid.UUID = Field(sa_column=Column('id', Uuid, primary_key=True))
+            search: Optional[typing.Any] = Field(default=None, sa_column=Column('search', TSVECTOR))
+        """,
+    )
+
+
+def test_metadata_ref(generator: CodeGenerator) -> None:
+    from sqlmodel import SQLModel
+
+    Table(
+        "metadata_ref_test_table",
+        generator.metadata,
+        Column("id", INTEGER, primary_key=True),
+    )
+
+    code = generator.generate()
+    validate_code(
+        code,
+        """\
+            from sqlalchemy import Column, Integer
+            from sqlmodel import Field, SQLModel
+
+            class MetadataRefTestTable(SQLModel, table=True):
+                __tablename__ = 'metadata_ref_test_table'
+
+                id: int = Field(sa_column=Column('id', Integer, primary_key=True))
+        """,
+    )
+
+    SQLModel.metadata.clear()  # clear the metadata to avoid with the tables defined in this test
+    exec(code, globals())
+
+    assert len(SQLModel.metadata.tables) == 1
+    assert "metadata_ref_test_table" in SQLModel.metadata.tables