From 5c859466efde26344c882c20301e839f2d65da9d Mon Sep 17 00:00:00 2001
From: miraclesu <suchuangji@gmail.com>
Date: Sun, 11 Aug 2013 22:20:05 +0800
Subject: [PATCH 1/2] ignore struct field if form tag value is '-'

---
 utils.go      | 2 ++
 utils_test.go | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/utils.go b/utils.go
index 0afcb4ba..df23cb8e 100644
--- a/utils.go
+++ b/utils.go
@@ -195,6 +195,8 @@ func ParseForm(form url.Values, obj interface{}) error {
 		var tag string
 		if len(tags) == 0 || len(tags[0]) == 0 {
 			tag = fieldT.Name
+		} else if tags[0] == "-" {
+			continue
 		} else {
 			tag = tags[0]
 		}
diff --git a/utils_test.go b/utils_test.go
index 994846fe..6075b445 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -104,8 +104,8 @@ func TestInSlice(t *testing.T) {
 
 func TestParseForm(t *testing.T) {
 	type user struct {
-		Id    int
-		tag   string      `form:tag`
+		Id    int         `form:"-"`
+		tag   string      `form:"tag"`
 		Name  interface{} `form:"username"`
 		Age   int         `form:"age,text"`
 		Email string
@@ -114,6 +114,8 @@ func TestParseForm(t *testing.T) {
 
 	u := user{}
 	form := url.Values{
+		"Id":       []string{"1"},
+		"-":        []string{"1"},
 		"tag":      []string{"no"},
 		"username": []string{"test"},
 		"age":      []string{"40"},

From 459b97858c4a8c26cfd1b4d89907606eb3263108 Mon Sep 17 00:00:00 2001
From: miraclesu <suchuangji@gmail.com>
Date: Sun, 11 Aug 2013 22:42:35 +0800
Subject: [PATCH 2/2] renderform ignore struct field if form tag value is '-'

---
 utils.go      | 22 +++++++++++++---------
 utils_test.go |  9 +++++----
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/utils.go b/utils.go
index df23cb8e..0ab108ff 100644
--- a/utils.go
+++ b/utils.go
@@ -282,19 +282,23 @@ func RenderForm(obj interface{}) template.HTML {
 		fieldT := objT.Field(i)
 		tags := strings.Split(fieldT.Tag.Get("form"), ",")
 		name := fieldT.Name
-		if len(tags) < 2 {
-			if len(tags) == 1 && len(tags[0]) > 0 {
-				name = tags[0]
-			}
-			raw = append(raw, fmt.Sprintf(`%v: <input name="%v" type="text" value="%v">`,
-				fieldT.Name, name, fieldV.Interface()))
-		} else {
+		fType := "text"
+		if len(tags) > 0 && tags[0] == "-" {
+			continue
+		}
+
+		if len(tags) == 1 && len(tags[0]) > 0 {
+			name = tags[0]
+		} else if len(tags) >= 2 {
 			if len(tags[0]) > 0 {
 				name = tags[0]
 			}
-			raw = append(raw, fmt.Sprintf(`%v: <input name="%v" type="%v" value="%v">`,
-				fieldT.Name, name, tags[1], fieldV.Interface()))
+			if len(tags[1]) > 0 {
+				fType = tags[1]
+			}
 		}
+		raw = append(raw, fmt.Sprintf(`%v: <input name="%v" type="%v" value="%v">`,
+			fieldT.Name, name, fType, fieldV.Interface()))
 	}
 	return template.HTML(strings.Join(raw, "</br>"))
 }
diff --git a/utils_test.go b/utils_test.go
index 6075b445..22416ffe 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -150,10 +150,11 @@ func TestParseForm(t *testing.T) {
 
 func TestRenderForm(t *testing.T) {
 	type user struct {
-		Id    int
-		tag   string      `form:tag`
+		Id    int         `form:"-"`
+		tag   string      `form:"tag"`
 		Name  interface{} `form:"username"`
 		Age   int         `form:"age,text"`
+		Sex   string
 		Email []string
 		Intro string `form:",textarea"`
 	}
@@ -165,9 +166,9 @@ func TestRenderForm(t *testing.T) {
 	}
 	output = RenderForm(&u)
 	result := template.HTML(
-		`Id: <input name="Id" type="text" value="0"></br>` +
-			`Name: <input name="username" type="text" value="test"></br>` +
+		`Name: <input name="username" type="text" value="test"></br>` +
 			`Age: <input name="age" type="text" value="0"></br>` +
+			`Sex: <input name="Sex" type="text" value=""></br>` +
 			`Intro: <input name="Intro" type="textarea" value="">`)
 	if output != result {
 		t.Errorf("output should equal `%v` but got `%v`", result, output)