Add Debug Mode

chain.go

@@ -12,6 +12,7 @@ import (
 type Chain struct {
 	db     *sql.DB
 	driver string
+	debug  bool
 	value  interface{}
 
 	Errors []error
@@ -27,10 +28,20 @@ type Chain struct {
 	unscoped           bool
 }
 
+func (s *Chain) msg(str string) {
+	if s.debug {
+		debug(str)
+	}
+}
+
 func (s *Chain) err(err error) error {
 	if err != nil {
 		s.Errors = append(s.Errors, err)
 		s.Error = err
+
+		if s.debug {
+			debug(err)
+		}
 	}
 	return err
 }
@@ -206,6 +217,11 @@ func (s *Chain) Table(name string) *Chain {
 	return s
 }
 
+func (s *Chain) Debug() *Chain {
+	s.debug = true
+	return s
+}
+
 func (s *Chain) validSql(str string) (result bool) {
 	result = regexp.MustCompile("^\\s*[\\w][\\w\\s,.]*[\\w]\\s*$").MatchString(str)
 	if !result {

gorm_test.go

@@ -48,6 +48,7 @@ func init() {
 		panic(fmt.Sprintf("No error should happen when connect database, but got %+v", err))
 	}
 	db.SetPool(10)
+	db.DebugMode = true
 
 	err = db.Exec("drop table users;").Error
 	if err != nil {

main.go

@@ -3,8 +3,9 @@ package gorm
 import "database/sql"
 
 type DB struct {
-	db     *sql.DB
-	driver string
+	db        *sql.DB
+	driver    string
+	DebugMode bool
 }
 
 func Open(driver, source string) (db DB, err error) {
@@ -18,7 +19,7 @@ func (s *DB) SetPool(n int) {
 }
 
 func (s *DB) buildChain() *Chain {
-	return &Chain{db: s.db, driver: s.driver}
+	return &Chain{db: s.db, driver: s.driver, debug: s.DebugMode}
 }
 
 func (s *DB) Where(querystring interface{}, args ...interface{}) *Chain {
@@ -81,6 +82,10 @@ func (s *DB) Table(name string) *Chain {
 	return s.buildChain().Table(name)
 }
 
+func (s *DB) Debug() *Chain {
+	return s.buildChain().Debug()
+}
+
 func (s *DB) CreateTable(value interface{}) *Chain {
 	return s.buildChain().CreateTable(value)
 }