From 9e762a9a301b2cf65af6c16339316d28f6c71a11 Mon Sep 17 00:00:00 2001
From: Jinzhu <wosmvp@gmail.com>
Date: Mon, 11 Nov 2013 09:05:14 +0800
Subject: [PATCH] Try to add logger

---
 README.md |  5 +++--
 chain.go  |  1 +
 logger.go | 31 +++++++++++++++++++++++++++++++
 main.go   |  4 ++++
 utils.go  |  5 -----
 5 files changed, 39 insertions(+), 7 deletions(-)
 create mode 100644 logger.go

diff --git a/README.md b/README.md
index ed53f5af..4496f152 100644
--- a/README.md
+++ b/README.md
@@ -668,9 +668,10 @@ db.Where("email = ?", "x@example.org").Attrs(User{FromIp: "111.111.111.111"}).Fi
 ```
 
 ## TODO
+* Transaction
+* Logger
+* Join, Having, Group
 * Index, Unique, Valiations
-* SQL Log
-* SQL Query with goroutines
 
 # Author
 
diff --git a/chain.go b/chain.go
index 01064467..620f9d40 100644
--- a/chain.go
+++ b/chain.go
@@ -32,6 +32,7 @@ func (s *Chain) err(err error) error {
 	if err != nil {
 		s.Errors = append(s.Errors, err)
 		s.Error = err
+		warn(err)
 	}
 	return err
 }
diff --git a/logger.go b/logger.go
new file mode 100644
index 00000000..05ddcec6
--- /dev/null
+++ b/logger.go
@@ -0,0 +1,31 @@
+package gorm
+
+import "fmt"
+
+var logger interface{}
+
+type Logger interface {
+	Print(v ...interface{})
+}
+
+func Print(level string, v ...interface{}) {
+	args := []interface{}{level}
+
+	if l, ok := logger.(Logger); ok {
+		l.Print(append(args, v...))
+	} else {
+		fmt.Println("logger haven't been set,", append(args, v...))
+	}
+}
+
+func warn(v ...interface{}) {
+	Print("warn", v...)
+}
+
+func info(v ...interface{}) {
+	Print("info", v...)
+}
+
+func debug(v ...interface{}) {
+	Print("debug", v...)
+}
diff --git a/main.go b/main.go
index 1f4ff90f..f4ea0e40 100644
--- a/main.go
+++ b/main.go
@@ -19,6 +19,10 @@ func (s *DB) SetPool(n int) {
 	s.db.SetMaxIdleConns(n)
 }
 
+func (s *DB) SetLogger(l interface{}) {
+	logger = l
+}
+
 func (s *DB) SingularTable(result bool) {
 	singularTableName = result
 }
diff --git a/utils.go b/utils.go
index b4b7e4c2..7627e459 100644
--- a/utils.go
+++ b/utils.go
@@ -63,8 +63,3 @@ func getInterfaceAsString(value interface{}) (str string, err error) {
 	}
 	return
 }
-
-func debug(value interface{}) {
-	fmt.Printf("***************\n")
-	fmt.Printf("%+v\n\n", value)
-}