英文:
Validation in GO "ozzo-validation"
问题
我是你的中文翻译助手，以下是翻译好的内容：
我不是GO的高手，只是尝试使用gin和名为ozzo-validation的插件创建一个简单的crud。
我的代码：
package models
import (
validation "github.com/go-ozzo/ozzo-validation"
"gorm.io/gorm"
)
type Post struct {
gorm.Model
Name string `gorm:"type:varchar(255);"`
Desc string `gorm:"type:varchar(500);"`
}
type PostData struct {
Name string `json:"name"`
Desc string `json:"desc"`
}
func (p PostData) Validate() error {
return validation.ValidateStruct(&p,
validation.Field(&p.Name, validation.Required, validation.Length(5, 20)),
validation.Field(&p.Desc, validation.Required),
)
}
PostController:
package controllers
import (
"curd/app/models"
"fmt"
"github.com/gin-gonic/gin"
)
func Store(c *gin.Context) {
// 验证输入
var post models.PostData
err := post.Validate()
fmt.Println(err)
}
{
"name": "sdfsdfsfsdf"
}
问题是，当我从Postman提交上述JSON数据时，验证器在终端中给出以下错误信息：
desc: 不能为空；name: 不能为空。
英文:
I'm nob in GO 
just try to create simple crud throw it using gin and plugin called ozzo-validation
My code:
package models
import (
validation "github.com/go-ozzo/ozzo-validation"
"gorm.io/gorm"
)
type Post struct {
gorm.Model
Name string `gorm:"type:varchar(255);"`
Desc string `gorm:"type:varchar(500);"`
}
type PostData struct {
Name string `json:"name"`
Desc string `json:"desc"`
}
func (p PostData) Validate() error {
return validation.ValidateStruct(&p,
validation.Field(&p.Name, validation.Required, validation.Length(5, 20)),
validation.Field(&p.Desc, validation.Required),
)
}
PostController:
package controllers
import (
"curd/app/models"
"fmt"
"github.com/gin-gonic/gin"
)
func Store(c *gin.Context) {
// Validate Input
var post models.PostData
err := post.Validate()
fmt.Println(err)
}
{
"name": "sdfsdfsfsdf"
}
The problem is once I submit the above JSON data from the postman the validation gives me this in terminal :
desc: cannot be blank; name: cannot be blank.
答案1
得分: 0
如评论中所述，您需要在执行验证之前将HTTP请求中的数据解码为结构体。您看到的验证错误是在您的Post结构体的新实例（每个字段都具有零值）上调用Validate()的结果。请尝试这个。
func Store(c *gin.Context) {
var post models.PostData
// 这将根据内容类型标头推断要使用的绑定器。
if err := c.ShouldBind(&post); err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
return
}
// 验证输入
err := post.Validate()
fmt.Println(err)
}
英文:
As noted in the comments, you need to decode the data from the HTTP request into the struct before you can perform validation. The validation errors you're seeing are a product of calling Validate() on a fresh instance (with zero values in every field) of your Post struct. Try this.
func Store(c *gin.Context) {
var post models.PostData
// This will infer what binder to use depending on the content-type header.
if err := c.ShouldBind(&post); err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
return
}
// Validate Input
err := post.Validate()
fmt.Println(err)
}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论