✨ Support pattern parameter

sqlmodel/main.py

@@ -238,6 +238,7 @@ def Field(
     max_length: Optional[int] = None,
     allow_mutation: bool = True,
     regex: Optional[str] = None,
+    pattern: Optional[str] = None,
     discriminator: Optional[str] = None,
     repr: bool = True,
     primary_key: Union[bool, UndefinedType] = Undefined,
@@ -283,6 +284,7 @@ def Field(
     max_length: Optional[int] = None,
     allow_mutation: bool = True,
     regex: Optional[str] = None,
+    pattern: Optional[str] = None,
     discriminator: Optional[str] = None,
     repr: bool = True,
     primary_key: Union[bool, UndefinedType] = Undefined,
@@ -337,6 +339,7 @@ def Field(
     max_length: Optional[int] = None,
     allow_mutation: bool = True,
     regex: Optional[str] = None,
+    pattern: Optional[str] = None,
     discriminator: Optional[str] = None,
     repr: bool = True,
     sa_column: Union[Column[Any], UndefinedType] = Undefined,
@@ -372,6 +375,7 @@ def Field(
     max_length: Optional[int] = None,
     allow_mutation: bool = True,
     regex: Optional[str] = None,
+    pattern: Optional[str] = None,
     discriminator: Optional[str] = None,
     repr: bool = True,
     primary_key: Union[bool, UndefinedType] = Undefined,
@@ -387,6 +391,16 @@ def Field(
     schema_extra: Optional[Dict[str, Any]] = None,
 ) -> Any:
     current_schema_extra = schema_extra or {}
+
+    if IS_PYDANTIC_V2:
+        current_schema_extra.update(
+            pattern=pattern or regex or current_schema_extra.get("pattern")
+        )
+    else:
+        current_schema_extra.update(
+            regex=regex or pattern or current_schema_extra.get("pattern")
+        )
+
     field_info = FieldInfo(
         default,
         default_factory=default_factory,
@@ -409,7 +423,6 @@ def Field(
         min_length=min_length,
         max_length=max_length,
         allow_mutation=allow_mutation,
-        regex=regex,
         discriminator=discriminator,
         repr=repr,
         primary_key=primary_key,

tests/test_pydantic/test_field.py

@@ -55,3 +55,19 @@ class Model(SQLModel):
 
     instance = Model(id=123, foo="bar")
     assert "foo=" not in repr(instance)
+
+
+@pytest.mark.parametrize("param", ["regex", "pattern"])
+def test_field_regex_param(param: str):
+    class DateModel(SQLModel):
+        date_1: str = Field(**{param: r"^\d{2}-\d{2}-\d{4}$"})
+
+    DateModel(date_1="12-31-2024")  # Validates correctly
+
+
+def test_field_pattern_via_schema_extra():
+    class DateModel(SQLModel):
+        date_1: str = Field(schema_extra={"pattern": r"^\d{2}-\d{2}-\d{4}$"})
+
+    with pytest.raises(ValidationError):
+        DateModel(date_1="incorrect")