Golang实现评论系统教程

type Comment struct {
    ID        uint      `json:"id"`
    Content   string    `json:"content"`
    Author    string    `json:"author"`
    PostID    uint      `json:"post_id"`
    ParentID  *uint     `json:"parent_id,omitempty"` // 支持回复
    CreatedAt time.Time `json:"created_at"`
}

r.POST("/comments", createComment)
r.GET("/posts/:post_id/comments", getCommentsByPost)
r.PUT("/comments/:id", updateComment)
r.DELETE("/comments/:id", deleteComment)

func createComment(c *gin.Context) {
    var comment Comment
    if err := c.ShouldBindJSON(&comment); err != nil {
        c.JSON(400, gin.H{"error": err.Error()})
        return
    }

    result := db.Create(&comment)
    if result.Error != nil {
        c.JSON(500, gin.H{"error": result.Error.Error()})
        return
    }

    c.JSON(201, comment)
}