📝 Fix type alias check to ensure check_type is not empty before validation

Author: stickm4n

tests/conftest.py

@@ -93,3 +93,6 @@ def print_mock_fixture() -> Generator[PrintMock, None, None]:
 needs_py310 = pytest.mark.skipif(
     sys.version_info < (3, 10), reason="requires python3.10+"
 )
+needs_py312 = pytest.mark.skipif(
+    sys.version_info < (3, 12), reason="requires python3.12+"
+)

tests/test_field_sa_type.py

@@ -1,9 +1,12 @@
 import typing as t
+from textwrap import dedent
 
 import pytest
 import typing_extensions as te
 from sqlmodel import Field, SQLModel
 
+from tests.conftest import needs_py312
+
 
 def test_sa_type_typing_1() -> None:
     Type1_t = str
@@ -39,20 +42,28 @@ class Hero(SQLModel, table=True):
         weapon: Type4_t = "sword"
 
 
+@needs_py312
 def test_sa_type_typing_5() -> None:
+    test_code = dedent("""
     type Type5_t = str
 
     class Hero(SQLModel, table=True):
         pk: int = Field(primary_key=True)
         weapon: Type5_t = "sword"
+    """)
+    exec(test_code, globals())
 
 
+@needs_py312
 def test_sa_type_typing_6() -> None:
+    test_code = dedent("""
     type Type6_t = t.Annotated[str, "Just a comment"]
 
     class Hero(SQLModel, table=True):
         pk: int = Field(primary_key=True)
         weapon: Type6_t = "sword"
+    """)
+    exec(test_code, globals())
 
 
 def test_sa_type_typing_7() -> None:
@@ -115,20 +126,28 @@ class Hero(SQLModel, table=True):
         weapon: Type4_te = "sword"
 
 
+@needs_py312
 def test_sa_type_typing_extensions_5() -> None:
+    test_code = dedent("""
     type Type5_te = str
 
     class Hero(SQLModel, table=True):
         pk: int = Field(primary_key=True)
         weapon: Type5_te = "sword"
+    """)
+    exec(test_code, globals())
 
 
+@needs_py312
 def test_sa_type_typing_extensions_6() -> None:
+    test_code = dedent("""
     type Type6_te = te.Annotated[str, "Just a comment"]
 
     class Hero(SQLModel, table=True):
         pk: int = Field(primary_key=True)
         weapon: Type6_te = "sword"
+    """)
+    exec(test_code, globals())
 
 
 def test_sa_type_typing_extensions_7() -> None: