Impl current timestamp/date/time for expr

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sea-query"
-version = "0.2.4"
+version = "0.2.5"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

python/sea_query/_internal.pyi

@@ -74,6 +74,12 @@ class Expr:
     def count_distinct(self) -> SimpleExpr: ...
     def if_null(self, value: ValueType) -> SimpleExpr: ...
     @staticmethod
+    def current_timestamp() -> Expr: ...
+    @staticmethod
+    def current_date() -> Expr: ...
+    @staticmethod
+    def current_time() -> Expr: ...
+    @staticmethod
     def exists(query: SelectStatement) -> SimpleExpr: ...
     @staticmethod
     def case() -> CaseStatement: ...

src/expr.rs

@@ -163,6 +163,21 @@ impl Expr {
         SimpleExpr(self.take().if_null(&value))
     }
 
+    #[staticmethod]
+    fn current_timestamp() -> Expr {
+        Expr(Some(SeaExpr::current_timestamp()))
+    }
+
+    #[staticmethod]
+    fn current_date() -> Expr {
+        Expr(Some(SeaExpr::current_date()))
+    }
+
+    #[staticmethod]
+    fn current_time() -> Expr {
+        Expr(Some(SeaExpr::current_time()))
+    }
+
     #[staticmethod]
     fn exists(query: SelectStatement) -> SimpleExpr {
         SimpleExpr(SeaExpr::exists(query.0))

tests/test_table_columns.py

@@ -447,6 +447,18 @@ def test_col_auto_increment():
             "\"created_at\" timestamp without time zone DEFAULT 'now()'",
         ),
         (Column("data").json().default(Expr.value("{}")), "\"data\" json DEFAULT '{}'"),
+        (
+            Column("datetime").timestamp().default(Expr.current_timestamp()),
+            '"datetime" timestamp DEFAULT CURRENT_TIMESTAMP',
+        ),
+        (
+            Column("date").date().default(Expr.current_date()),
+            '"date" date DEFAULT CURRENT_DATE',
+        ),
+        (
+            Column("time").time().default(Expr.current_time()),
+            '"time" time DEFAULT CURRENT_TIME',
+        ),
     ],
 )
 def test_col_default(column, expected):