Make it easy when only change one field with Attr, Assign

README.md

@@ -98,6 +98,8 @@ db.Where(User{Name: "noexisting_user"}).Attrs(User{Age: 20}).FirstOrInit(&user)
 //// user -> select * from users where name = 'noexisting_user';
 //// If no record found, will assign the attrs to user, so user become:
 ////   User{Name: "noexisting_user", Age: 20}
+db.Where(User{Name: "noexisting_user"}).Attrs("age", 20).FirstOrInit(&user)
+// Same as above
 db.Where(User{Name: "Jinzhu"}).Attrs(User{Age: 20}).FirstOrInit(&user)
 //// user -> select * from users where name = 'jinzhu';
 //// If found the user, will ingore the attrs:
@@ -108,6 +110,8 @@ db.Where(User{Name: "noexisting_user"}).Assign(User{Age: 20}).FirstOrInit(&user)
 //// user -> select * from users where name = 'noexisting_user';
 //// If no record found, will assign the value to user, so user become:
 ////   User{Name: "noexisting_user", Age: 20} (same as FirstOrInit With Attrs)
+db.Where(User{Name: "noexisting_user"}).Assign("age", 20).FirstOrInit(&user)
+// Same as above
 //// user -> User{Name: "noexisting_user", Age: 20}
 db.Where(User{Name: "Jinzhu"}).Assign(User{Age: 20}).FirstOrInit(&user)
 //// user -> select * from users where name = 'jinzhu';
@@ -127,6 +131,8 @@ db.Where(User{Name: "noexisting_user"}).Attrs(User{Age: 20}).FirstOrCreate(&user
 //// user -> select * from users where name = 'noexisting_user';
 //// If not record found, will assing the attrs to the user first, then create it
 //// Same as db.Where(User{Name: "noexisting_user"}).FirstOrCreate(&user).Update("age": 20), but one less sql
+db.Where(User{Name: "noexisting_user"}).Attrs("age", 20).FirstOrCreate(&user)
+// Save as above
 //// user -> User{Id: 112, Name: "noexisting_user", Age: 20}
 db.Where(User{Name: "Jinzhu"}).Attrs(User{Age: 20}).FirstOrCreate(&user)
 //// user -> select * from users where name = 'jinzhu';

chain.go

@@ -153,8 +153,8 @@ func (s *Chain) Delete(value interface{}) *Chain {
 	return s
 }
 
-func (s *Chain) Update(column string, value interface{}) *Chain {
-	return s.Updates(map[string]interface{}{column: value}, true)
+func (s *Chain) Update(attrs ...interface{}) *Chain {
+	return s.Updates(toSearchableMap(attrs...), true)
 }
 
 func (s *Chain) Updates(values interface{}, ignore_protected_attrs ...bool) *Chain {
@@ -174,13 +174,13 @@ func (s *Chain) First(out interface{}, where ...interface{}) *Chain {
 	return s
 }
 
-func (s *Chain) Attrs(attrs interface{}) *Chain {
-	s.initAttrs = append(s.initAttrs, attrs)
+func (s *Chain) Attrs(attrs ...interface{}) *Chain {
+	s.initAttrs = append(s.initAttrs, toSearchableMap(attrs...))
 	return s
 }
 
-func (s *Chain) Assign(attrs interface{}) *Chain {
-	s.assignAttrs = append(s.assignAttrs, attrs)
+func (s *Chain) Assign(attrs ...interface{}) *Chain {
+	s.assignAttrs = append(s.assignAttrs, toSearchableMap(attrs...))
 	return s
 }
 

do.go

@@ -133,10 +133,7 @@ func (s *Do) create() {
 
 		if !s.hasError() {
 			result := reflect.ValueOf(s.value).Elem()
-			primary_key := result.FieldByName(s.model.primaryKey())
-			if primary_key.IsValid() {
-				primary_key.SetInt(id)
-			}
+			setFieldValue(result.FieldByName(s.model.primaryKey()), id)
 
 			s.err(s.model.callMethod("AfterCreate"))
 			s.err(s.model.callMethod("AfterSave"))
@@ -323,7 +320,7 @@ func (s *Do) count(value interface{}) {
 		for rows.Next() {
 			var dest int64
 			if s.err(rows.Scan(&dest)) == nil {
-				dest_out.SetInt(dest)
+				setFieldValue(dest_out, dest)
 			}
 		}
 	}
@@ -523,17 +520,24 @@ func (s *Do) initializeWithSearchCondition() {
 	for _, clause := range s.whereClause {
 		query := clause["query"]
 		switch query.(type) {
+		case map[string]interface{}:
+			for key, value := range query.(map[string]interface{}) {
+				m.setValueByColumn(key, value, s.value)
+			}
 		case []interface{}:
 			for _, obj := range query.([]interface{}) {
+				switch reflect.ValueOf(obj).Kind() {
+				case reflect.Struct:
 					m := &Model{data: obj, driver: s.driver}
 					for _, field := range m.columnsHasValue("") {
 						m.setValueByColumn(field.DbName, field.Value, s.value)
 					}
-			}
-		case map[string]interface{}:
-			for key, value := range query.(map[string]interface{}) {
+				case reflect.Map:
+					for key, value := range obj.(map[string]interface{}) {
 						m.setValueByColumn(key, value, s.value)
 					}
+				}
+			}
 		case interface{}:
 			m := &Model{data: query, driver: s.driver}
 			for _, field := range m.columnsHasValue("") {

gorm_test.go

@@ -870,14 +870,14 @@ func TestFindOrInitialize(t *testing.T) {
 		t.Errorf("user should be initialized with search value and attrs")
 	}
 
-	db.Where(&User{Name: "find or init"}).Assign(User{Age: 44}).FirstOrInit(&user4)
+	db.Where(&User{Name: "find or init"}).Assign("age", 44).FirstOrInit(&user4)
 	if user4.Name != "find or init" || user4.Id != 0 || user4.Age != 44 {
 		t.Errorf("user should be initialized with search value and assigned attrs")
 	}
 
 	db.Save(&User{Name: "find or init", Age: 33})
 
-	db.Where(&User{Name: "find or init"}).Attrs(User{Age: 44}).FirstOrInit(&user5)
+	db.Where(&User{Name: "find or init"}).Attrs("age", 44).FirstOrInit(&user5)
 	if user5.Name != "find or init" || user5.Id == 0 || user5.Age != 33 {
 		t.Errorf("user should be found and not initialized by Attrs")
 	}
@@ -910,7 +910,7 @@ func TestFindOrCreate(t *testing.T) {
 		t.Errorf("user should be created with inline search value")
 	}
 
-	db.Where(&User{Name: "find or create 3"}).Attrs(User{Age: 44}).FirstOrCreate(&user4)
+	db.Where(&User{Name: "find or create 3"}).Attrs("age", 44).FirstOrCreate(&user4)
 	if user4.Name != "find or create 3" || user4.Id == 0 || user4.Age != 44 {
 		t.Errorf("user should be created with search value and attrs")
 	}
@@ -920,7 +920,7 @@ func TestFindOrCreate(t *testing.T) {
 		t.Errorf("user should be created with search value and assigned attrs")
 	}
 
-	db.Where(&User{Name: "find or create"}).Attrs(User{Age: 44}).FirstOrInit(&user5)
+	db.Where(&User{Name: "find or create"}).Attrs("age", 44).FirstOrInit(&user5)
 	if user5.Name != "find or create" || user5.Id == 0 || user5.Age != 33 {
 		t.Errorf("user should be found and not initialized by Attrs")
 	}

main.go

@@ -30,12 +30,12 @@ func (s *DB) First(out interface{}, where ...interface{}) *Chain {
 	return s.buildChain().First(out, where...)
 }
 
-func (s *DB) Attrs(attrs interface{}) *Chain {
-	return s.buildChain().Attrs(attrs)
+func (s *DB) Attrs(attrs ...interface{}) *Chain {
+	return s.buildChain().Attrs(attrs...)
 }
 
-func (s *DB) Assign(attrs interface{}) *Chain {
-	return s.buildChain().Assign(attrs)
+func (s *DB) Assign(attrs ...interface{}) *Chain {
+	return s.buildChain().Assign(attrs...)
 }
 
 func (s *DB) FirstOrInit(out interface{}, where ...interface{}) *Chain {

model.go

@@ -151,9 +151,8 @@ func (m *Model) updatedColumnsAndValues(values map[string]interface{}) (map[stri
 		}
 	}
 
-	field := data.FieldByName("UpdatedAt")
-	if field.IsValid() && values["updated_at"] != nil && len(results) > 0 {
-		data.FieldByName("UpdatedAt").Set(reflect.ValueOf(time.Now()))
+	if values["updated_at"] != nil && len(results) > 0 {
+		setFieldValue(data.FieldByName("UpdatedAt"), time.Now())
 	}
 	result := len(results) > 0
 	return map[string]interface{}{}, result
@@ -238,9 +237,16 @@ func (m *Model) missingColumns() (results []string) {
 
 func (m *Model) setValueByColumn(name string, value interface{}, out interface{}) {
 	data := reflect.Indirect(reflect.ValueOf(out))
+	setFieldValue(data.FieldByName(snakeToUpperCamel(name)), value)
+}
 
-	field := data.FieldByName(snakeToUpperCamel(name))
+func setFieldValue(field reflect.Value, value interface{}) {
 	if field.IsValid() {
+		switch field.Kind() {
+		case reflect.Int, reflect.Int32, reflect.Int64:
+			field.SetInt(reflect.ValueOf(value).Int())
+		default:
 			field.Set(reflect.ValueOf(value))
 		}
 	}
+}

utils.go

@@ -29,6 +29,23 @@ func snakeToUpperCamel(s string) string {
 	return buf.String()
 }
 
+func toSearchableMap(attrs ...interface{}) (result interface{}) {
+	if len(attrs) > 1 {
+		if str, ok := attrs[0].(string); ok {
+			result = map[string]interface{}{str: attrs[1]}
+		}
+	} else if len(attrs) == 1 {
+		if attr, ok := attrs[0].(map[string]interface{}); ok {
+			result = attr
+		}
+
+		if attr, ok := attrs[0].(interface{}); ok {
+			result = attr
+		}
+	}
+	return
+}
+
 func debug(value interface{}) {
 	fmt.Printf("***************\n")
 	fmt.Printf("%+v\n\n", value)