fix: refactor update sql (#5274)

* fix: refactor UpdateSQL method and add test

* fix: add modify record into CHANGELOG

* fix: modify url in the CHANGELOG

* fix: modify pr url in the CHANGELOG

CHANGELOG.md

@@ -11,6 +11,7 @@
 - [fix: modify InsertOrUpdate method, Remove the isMulti variable and its associated code](https://github.com/beego/beego/pull/5269)
 - [refactor cache/redis: Use redisConfig to receive incoming JSON (previously using a map)](https://github.com/beego/beego/pull/5268)
 - [fix: refactor DeleteSQL method](https://github.com/beego/beego/pull/5271)
+- [fix: refactor UpdateSQL method](https://github.com/beego/beego/pull/5274)
 
 ## ORM refactoring
 - [introducing internal/models pkg](https://github.com/beego/beego/pull/5238)

client/orm/db.go

@@ -674,14 +674,7 @@ func (d *dbBase) Update(ctx context.Context, q dbQuerier, mi *models.ModelInfo,
 
 	setValues = append(setValues, pkValue)
 
-	Q := d.ins.TableQuote()
+	query := d.UpdateSQL(setNames, pkName, mi)
-
-	sep := fmt.Sprintf("%s = ?, %s", Q, Q)
-	setColumns := strings.Join(setNames, sep)
-
-	query := fmt.Sprintf("UPDATE %s%s%s SET %s%s%s = ? WHERE %s%s%s = ?", Q, mi.Table, Q, Q, setColumns, Q, Q, pkName, Q)
-
-	d.ins.ReplaceMarks(&query)
 
 	res, err := q.ExecContext(ctx, query, setValues...)
 	if err == nil {
@@ -690,6 +683,40 @@ func (d *dbBase) Update(ctx context.Context, q dbQuerier, mi *models.ModelInfo,
 	return 0, err
 }
 
+func (d *dbBase) UpdateSQL(setNames []string, pkName string, mi *models.ModelInfo) string {
+	buf := buffers.Get()
+	defer buffers.Put(buf)
+
+	Q := d.ins.TableQuote()
+
+	_, _ = buf.WriteString("UPDATE ")
+	_, _ = buf.WriteString(Q)
+	_, _ = buf.WriteString(mi.Table)
+	_, _ = buf.WriteString(Q)
+	_, _ = buf.WriteString(" SET ")
+
+	for i, name := range setNames {
+		if i > 0 {
+			_, _ = buf.WriteString(", ")
+		}
+		_, _ = buf.WriteString(Q)
+		_, _ = buf.WriteString(name)
+		_, _ = buf.WriteString(Q)
+		_, _ = buf.WriteString(" = ?")
+	}
+
+	_, _ = buf.WriteString(" WHERE ")
+	_, _ = buf.WriteString(Q)
+	_, _ = buf.WriteString(pkName)
+	_, _ = buf.WriteString(Q)
+	_, _ = buf.WriteString(" = ?")
+
+	query := buf.String()
+	d.ins.ReplaceMarks(&query)
+
+	return query
+}
+
 // Delete execute delete sql dbQuerier with given struct reflect.Value.
 // delete index is pk.
 func (d *dbBase) Delete(ctx context.Context, q dbQuerier, mi *models.ModelInfo, ind reflect.Value, tz *time.Location, cols []string) (int64, error) {

client/orm/db_test.go

@@ -129,6 +129,50 @@ func TestDbBase_InsertValueSQL(t *testing.T) {
 	}
 }
 
+func TestDbBase_UpdateSQL(t *testing.T) {
+	mi := &models.ModelInfo{
+		Table: "test_table",
+	}
+
+	testCases := []struct {
+		name string
+		db   *dbBase
+
+		setNames []string
+		pkName   string
+
+		wantRes string
+	}{
+		{
+			name: "update by dbBase",
+			db: &dbBase{
+				ins: &dbBase{},
+			},
+			setNames: []string{"name", "age", "sender"},
+			pkName:   "id",
+			wantRes:  "UPDATE `test_table` SET `name` = ?, `age` = ?, `sender` = ? WHERE `id` = ?",
+		},
+		{
+			name: "update by dbBasePostgres",
+			db: &dbBase{
+				ins: newdbBasePostgres(),
+			},
+			setNames: []string{"name", "age", "sender"},
+			pkName:   "id",
+			wantRes:  "UPDATE \"test_table\" SET \"name\" = $1, \"age\" = $2, \"sender\" = $3 WHERE \"id\" = $4",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+
+			res := tc.db.UpdateSQL(tc.setNames, tc.pkName, mi)
+
+			assert.Equal(t, tc.wantRes, res)
+		})
+	}
+}
+
 func TestDbBase_DeleteSQL(t *testing.T) {
 	mi := &models.ModelInfo{
 		Table: "test_table",