feat: add WhereNotNull method (#416)

Co-authored-by: Wenbo Han <[email protected]>

Author: Kamandlou

contracts/database/orm/orm.go

@@ -143,6 +143,8 @@ type Query interface {
 	WhereNotBetween(column string, x, y any) Query
 	// WhereNull adds a "where column is null" clause to the query.
 	WhereNull(column string) Query
+	// WhereNotNull adds a "where column is not null" clause to the query.
+	WhereNotNull(column string) Query
 	// WithoutEvents disables event firing for the query.
 	WithoutEvents() Query
 	// WithTrashed allows soft deleted models to be included in the results.

database/gorm/query.go

@@ -721,6 +721,10 @@ func (r *QueryImpl) WhereNull(column string) ormcontract.Query {
 	return r.Where(fmt.Sprintf("%s IS NULL", column))
 }
 
+func (r *QueryImpl) WhereNotNull(column string) ormcontract.Query {
+	return r.Where(fmt.Sprintf("%s IS NOT NULL", column))
+}
+
 func (r *QueryImpl) WithoutEvents() ormcontract.Query {
 	return NewQueryImplByInstance(r.instance, &QueryImpl{
 		config:        r.config,

database/gorm/query_test.go

@@ -2929,6 +2929,26 @@ func (s *QueryTestSuite) TestWhereNull() {
 	}
 }
 
+func (s *QueryTestSuite) TestWhereNotNull() {
+	for driver, query := range s.queries {
+		s.Run(driver.String(), func() {
+			bio := "where_not_null_bio"
+			user := User{Name: "where_not_null_user", Avatar: "where_not_null_avatar", Bio: &bio}
+			s.Nil(query.Create(&user))
+			s.True(user.ID > 0)
+
+			user1 := User{Name: "where_not_null_user", Avatar: "where_not_null_avatar_1"}
+			s.Nil(query.Create(&user1))
+			s.True(user1.ID > 0)
+
+			var users []User
+			s.Nil(query.Where("name = ?", "where_not_null_user").WhereNotNull("bio").Find(&users))
+			s.True(len(users) == 1)
+			s.True(users[0].ID == user.ID)
+		})
+	}
+}
+
 func (s *QueryTestSuite) TestWithoutEvents() {
 	for _, query := range s.queries {
 		tests := []struct {