模型绑定和校

模型绑定的作用是将请求体绑定到自定义类型，目前Gin支持：JSON、XML、YAML和标准form请求参数(比如：foo=bar&boo=baz)。Gin使用go-payground/validator/validtor/v10，做参数的校验。若参数是必输，可以说明的使用binding:"required"修饰之。当在绑定的时候发现是空值就会返回错误。所以语法格式：

绑定标签类型:"fieldname" binding:"required"

package main

import (
    "fmt"
    "net/http"
    "time"

    "github.com/gin-gonic/gin"
    "gorm.io/driver/mysql"
    "gorm.io/gorm"
)

type User struct {
    gorm.Model
    Name string `form:"name" json:"name" xml:"name" binding:"required"`
    Mark int    `form:"mark" json:"mark" xml:"mark" binding:"required"`
}

func (User) TableName() string {
    return "users"
}

var db *gorm.DB

func init() {
    dsn := "root:123456@tcp(127.0.0.1)/test?charset=utf8mb4&parseTime=True&loc=Local"
    d, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
    if err != nil {
        fmt.Println("open mysql failed,", err)
    }
    db = d

    db.AutoMigrate(&User{})
    sqlDB, _ := db.DB()
    sqlDB.SetMaxIdleConns(10)
    sqlDB.SetMaxOpenConns(500)
    sqlDB.SetConnMaxLifetime(time.Hour)
}
func postApi(c *gin.Context) {
    var form User
    if err := c.ShouldBind(&form); err != nil {
        c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
        return
    }
    if error := db.Create(&form).Error; error != nil {
        fmt.Println("插入失败", error)
        return
    }
    c.JSON(http.StatusOK, gin.H{"data": &form})
}
func main() {
    r := gin.Default()
    r.POST("addInfo", postApi)
    r.Run()
}

绑定Url

示例代码

此类型主要用在RESTful类型的接口，具体的示例代码如下：

package main
import "github.com/gin-gonic/gin"

func main() {
    route := gin.Default()
    route.GET("/:name/:id", func (c *gin.Context) {
        c.JSON(200, gin.H{
        "name": c.Param("name"),
        "uuid": c.Param("id"),
        })
    })
    route.Run()
}