Golang Gin retrieve integer data

Question

I'm trying to retrieve int data from POST requisitions with Gin, but I'm getting an error saying that the functions (PostForm, or any other) expects strings as arguments. I've tried to search for a function expecting int content, but with no success. I have a struct do define the content, see the code below.

package userInfo

import(
    "net/http"
    "github.com/gin-gonic/gin"
)

type Person struct {
    Name string
    Age int
}

func ReturnPostContent(c *gin.Context){
    var user Person
    user.Name = c.PostForm("name")
    user.Age = c.PostForm("age")    
    c.JSON(http.StatusOK, gin.H{        
        "user_name": user.Name,
        "user_age": user.Age,       
    })
}

I was thinking in converting the value to int, but if I have 10 inputs this becomes very difficult and impractible.

The error from user.Age:

cannot use c.PostForm("age") (value of type string) as int value in assignmentcompiler

I know about that, but if I have too much inputs this may be a problem, I'd like to know if theres an easier way to get int data with Gin Gonic. I've tried to search for it, but I didn't find it. — Vinicius Mocci, Mar 26 '21 at 12:39
Then you're probably looking for this: [Bind Query String or Post Data](https://pkg.go.dev/github.com/gin-gonic/gin#readme-bind-query-string-or-post-data) — mkopriva, Mar 26 '21 at 12:43

score 4 · Answer 1 · edited Aug 25 '22 at 11:17

4

After a lot of source code reading, I finally found out that all you need is to add a 'form' tag on the required field:

Age int `form:"age"`

edited Aug 25 '22 at 11:17

Adrian Mole

49,934
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answered Aug 19 '22 at 07:55

hugh lu

41
1

score 3 · Answer 2 · answered Apr 05 '21 at 13:20

user strconv.Atoi(c.PostForm("age"))

complete code:

Person:

type Person struct {
    Name string
    Age  int
}

r.POST("/profile", func(c *gin.Context) {
    profile := new(Person)

    profile.Name = c.PostForm("name")
    profile.Age, _ = strconv.Atoi(c.PostForm("age"))

    response := gin.H{
        "user_name": profile.Name,
        "user_age":  profile.Age,
    }
    
    c.JSON(http.StatusOK, response)

})

Golang Gin retrieve integer data

2 Answers2