Polish The Not Method

README.md

@@ -78,6 +78,10 @@ db.Not([]int64{}).First(&user)
 //// user -> select * from users;
 db.Not("name", "jinzhu").First(&user)
 //// user -> select * from users where name <> "jinzhu"
+db.Not("name = ?", "jinzhu").First(&user)
+//// user -> select * from users where NOT(name = "jinzhu")
+db.Not("name <> ?", "jinzhu").First(&user)
+//// user -> select * from users where NOT(name <> "jinzhu")
 db.Not("name", []string{"jinzhu", "jinzhu 2"}).First(&user)
 //// user -> select * from users where name NOT IN ("jinzhu", "jinzhu 2")
 db.Not(User{Name: "jinzhu"}).First(&user)

do.go

@@ -434,6 +434,9 @@ func (s *Do) buildNotCondition(clause map[string]interface{}) (str string) {
 		if regexp.MustCompile("^\\s*\\d+\\s*$").MatchString(value) {
 			id, _ := strconv.Atoi(value)
 			return fmt.Sprintf("(%v <> %v)", s.model.primaryKeyDb(), id)
+		} else if regexp.MustCompile("(?i) (=|<>|>|<|LIKE|IS) ").MatchString(value) {
+			str = fmt.Sprintf(" NOT (%v) ", value)
+			not_equal_sql = fmt.Sprintf(" NOT (%v) ", value)
 		} else {
 			str = fmt.Sprintf(" (%v NOT IN (?)) ", value)
 			not_equal_sql = fmt.Sprintf(" (%v <> ?) ", value)

gorm_test.go

@@ -958,6 +958,18 @@ func TestNot(t *testing.T) {
 		t.Errorf("Should find all users's name not equal 3")
 	}
 
+	users4 = []User{}
+	db.Not("name = ?", "3").Find(&users4)
+	if len(users1)-len(users4) != int(name_3_count) {
+		t.Errorf("Should find all users's name not equal 3")
+	}
+
+	users4 = []User{}
+	db.Not("name <> ?", "3").Find(&users4)
+	if len(users4) != int(name_3_count) {
+		t.Errorf("Should find all users's name not equal 3")
+	}
+
 	db.Not(User{Name: "3"}).Find(&users5)
 	if len(users1)-len(users5) != int(name_3_count) {
 		t.Errorf("Should find all users's name not equal 3")