文章目录
- 一、数据绑定:
- 二、数据验证:
-
- 1. 使用:
- 2. 其他验证器:
- 3. 自定义验证器:
- 3.2 定义验证器:
- 3.3 注册验证器:
- 3.4 结构体中使用:
- 4. beego中的验证器:
- 4.2 验证方法:
- 4.3 通过 StructTag校验数据：
-
- BindQuery\ShouldBindQuery函数只绑定查询参数，而不绑定POST数据
- Bind\ShouldBind函数绑定Get 参数，绑定POST数据
一、数据绑定:
1. 数据绑定介绍:
Gin提供了两类绑定方法:
- Must bind:
- Methods:
Bind, BindJSON, BindXML, BindQuery, BindYAML
- Behavior:
- 这些方法属于MustBindWith的具体调用. 如果发生绑定错误, 则请求终止, 并触发
c.AbortWithError(400, err).SetType(ErrorTypeBind)响应状态码被设置为 400 并且Content-Type被设置为text/plain; charset=utf-8. 如果您在此之后尝试设置响应状态码, Gin会输出日志[GIN-debug] [WARNING] Headers were already written. Wanted to override status code 400 with 422. 如果您希望更好地控制绑定, 考虑使用ShouldBind等效方法.
- 这些方法属于MustBindWith的具体调用. 如果发生绑定错误, 则请求终止, 并触发
- Methods:
- Should bind:
- Methods:
ShouldBind, ShouldBindJSON, ShouldBindXML, ShouldBindQuery, ShouldBindYAML
- Behavior:
- 这些方法属于ShouldBindWith的具体调用. 如果发生绑定错误, Gin 会返回错误并由开发者处理错误和请求.
- Methods:
2. 数据绑定–Should bind:
2.1 ShouldBind:
.
├── chapter05
│ └── bind_form.go
├── main.go
├── static
├── template
│ ├── chapter05
│ │ └── user_add.html./main.go
package main import ( "gin_project/chapter05" "github.com/gin-gonic/gin" ) func main() { engine := gin.Default() // 注册模板 engine.LoadHTMLGlob("template/**/*") // 注册静态文件 engine.Static("./static", "static") // 注册路由 engine.GET("/to_bindform", chapter05.ToBindform) engine.POST("/push_bindform", chapter05.DoBindform) engine.GET("/push_bindquery", chapter05.DoBindquery) // http://localhost:9000/push_bindquery?name=zhangsan&age=110&addr=%E5%8C%97%E4%BA%AC engine.POST("/push_bindajax", chapter05.DoBindajax) engine.Run(":9000") }
- ./chapter05/bind_form.go
package chapter05 import ( "fmt" "net/http" "github.com/gin-gonic/gin" ) type User struct { Name string `form:"name" json:"name"` Age int `form:"age" json:"age"` Addr string `form:"addr" json:"addr"` } func ToBindform(ctx *gin.Context) { ctx.HTML(http.StatusOK, "chapter05/user_add.html", nil) } // bind form data func DoBindform(ctx *gin.Context) { var user User err := ctx.ShouldBind(&user) fmt.Println(user) if err != nil { ctx.String(http.StatusNotFound, "绑定form失败") } else { ctx.String(http.StatusOK, "绑定form成功") } } // bind Query data func DoBindquery(ctx *gin.Context) { var user User err := ctx.ShouldBind(&user) fmt.Println(user) if err != nil { ctx.String(http.StatusNotFound, "绑定query失败") } else { ctx.String(http.StatusOK, "绑定query成功") } } // bind Ajax data func DoBindajax(ctx *gin.Context) { var user User err := ctx.ShouldBind(&user) fmt.Println(user) if err != nil { ctx.String(http.StatusNotFound, "绑定ajax失败") } else { ctx.String(http.StatusOK, "绑定ajax成功") } }
./template/chapter05/user_add.html
{{ define "chapter05/user_add.html" }}
<!DOCTYPE html> <html lang="zh"> <head> <title>post请求练习</title> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <style> .userForm { width: 480px; height: 360px; margin: 20px 200px; } input { margin: 5px 0; } </style> </head> <body> <div class="userForm"> <h2>bind form data</h2> <form action="/push_bindform" method="post"> <p>姓名:<input type="text" name="name" id="name"></p> <p>年龄:<input type="text" name="age" id="age"></p> <p>地址:<input type="text" name="addr" id="addr"></p> <p><input type="submit" value="提交form"></p> <p><input type="button" value="提交ajax" id="sub-btn"></p> </form> </div> <script> // 使用ajax提交json