Golang GIN error when binding form data

php editor Xinyi brings you a solution to the problem of errors when binding form data in the Golang GIN framework. When using the GIN framework for form data binding, you sometimes encounter some problems, such as the inability to parse the form data correctly. These problems may be caused by parameter binding, data type mismatch, etc. This article will introduce how to correctly bind form data and solve common errors to help developers successfully use the GIN framework for development work.

Question content

When I try to bind a form data request to a structure, it errors out with "Fatal Error: Stack Overflow".

This is my code. There's nothing to explain. I'm getting started with the code but can't figure it out.

Structure

type Wish struct {
    ID                int                `gorm:"primarykey;autoIncrement" json:"id"`
    CreatedAt         time.Time          `json:"created_at"`
    UpdatedAt         time.Time          `json:"updated_at"`
    DeletedAt         gorm.DeletedAt     `gorm:"index" json:"deleted_at"`
    UserID            int                `json:"user_id" form:"user_id"`
    User              *User              `gorm:"foreignKey:UserID" json:"user_data,omitempty"`
    WishTypeID        int                `json:"wish_type_id" form:"wish_type_id"`
    WishType          *WishType          `gorm:"foreignKey:WishTypeID" json:"wish_type_data,omitempty"`
    ProcessTrack      []*ProcessTrack    `gorm:"foreignKey:WishID" json:"process_track,omitempty"`
    VacationDateRange *VacationDateRange `gorm:"foreignKey:WishID" json:"vacation_date_range,omitempty"`
    Content           string             `gorm:"type:varchar(255)" json:"content" form:"content"`
    Status            WishStatus         `gorm:"type:integer" json:"status" form:"status"`
    Files             []*File            `gorm:"polymorphic:Module;polymorphicValue:wish_files" json:"files,omitempty"`
}

Controller

var wish migrations.Wish
    if err := c.Bind(&wish); err != nil {
        c.JSON(400, gin.H{"error": err.Error(), "message": "Talep Okunamadı!"})
        return
    }
    c.JSON(200, wish)
    return

Request

Solution

I modified the controller

type Req struct {
        Content           string                        `form:"content"`
        WishTypeID        int                           `form:"wish_type_id"`
        VacationDateRange *migrations.VacationDateRange `form:"vacation_date_range"`
    }
    err, i, g := authorizer.AuthorizeIt(c, a.Subject, a.Action)
    if err != nil {
        c.JSON(i, g)
        return
    }
    var wishReq Req
    var wish migrations.Wish
    if err := c.Bind(&wishReq); err != nil {
        c.JSON(400, gin.H{"error": err.Error(), "message": "Wish can't bind."})
        return
    }
    wish.WishTypeID = wishReq.WishTypeID
    wish.Content = wishReq.Content
    wish.VacationDateRange = wishReq.VacationDateRange

But I still don't understand why it can't be the first style. I've also added common usage. It usually works too.

err, i, g := authorizer.AuthorizeIt(c, a.Subject, a.Action)
    if err != nil {
        c.JSON(i, g)
        return
    }
    var announce mig.Announce

    err = c.Bind(&announce)
    if err != nil {
        c.JSON(400, gin.H{"error": err.Error(), "message": "Announce can't bind. Error Code: AN-CRT-20"})
        return
    }

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