go - beego 模型错误

Question

我对 beego 很陌生。我开始一个小项目来发现并开始学习框架。我使用 bee 命令来创建项目:

bee new my_project

beego的版本是:

bee   :1.4.1
beego :1.6.1
Go    :go version go1.6.3 linux/amd64

我有一个小模型，我的模型文件内容是:

package models

import "github.com/astaxie/beego/orm"

type ShortUrl struct {
    Id     int `orm:"auto"`
    Domain string
    Short  string
}

func init() {
    orm.RegisterModel(new(ShortUrl))
}

在主文件中:

package main

import (
    "github.com/astaxie/beego"
    "github.com/astaxie/beego/orm"
    _ "github.com/hobbestigrou/mahewinsexyurl/routers"
)

func init() {
    orm.RegisterDriver("sqlite3", orm.DRSqlite)
    orm.RegisterDataBase("default", "sqlite3", "data.db")
    orm.RunCommand()
}

func main() {
    beego.Run()
}

在 Controller 文件中:

package controllers

import (
    "github.com/astaxie/beego"
    "github.com/astaxie/beego/orm"
    "github.com/hobbestigrou/mahewinsexyurl/models"
    _ "github.com/mattn/go-sqlite3"
    "github.com/ventu-io/go-shortid"
    "net/url"
)

type MainController struct {
    beego.Controller
}

type Domain struct {
    Id  int    `form:"-"`
    Url string `form:"url"`
}

func (c *MainController) Get() {
    _ = beego.ReadFromRequest(&c.Controller)

    c.Data["Form"] = &Domain{}
    c.TplName = "index.tpl"
}

func (c *MainController) Post() {
    o := orm.NewOrm()

    flash := beego.NewFlash()
    domain := c.Input().Get("url")

    if _, err := url.ParseRequestURI(domain); err != nil {
        flash.Error("Please put a valid url")
        flash.Store(&c.Controller)
        c.Redirect("/", 302)
    }

    short, _ := shortid.Generate()
    ur := &models.ShortUrl{
        Domain: domain,
        Short:  short,
    }

    if created, _, err := o.ReadOrCreate(&ur, "Domain"); err != nil {
        if created {
            flash.Notice("The url was added: ", short)
            flash.Store(&c.Controller)
            c.Redirect("/", 302)
            } else {
                flash.Notice("The url already exists", short)
                flash.Store(&c.Controller)
                c.Redirect("/", 302)
            }
        }

        c.TplName = "index.tpl"
}

我知道我可以重构 Flash 部分，但目前只是一个细节。

路由器:

package routers

import (
    "github.com/hobbestigrou/mahewinsexyurl/controllers"
    "github.com/astaxie/beego"
)

func init() {
    beego.Router("/", &controllers.MainController{})
}

我使用 syncdb 创建表:

./mahewinsexyurl orm syncdb

表创建成功。但是当我尝试发布数据时，我得到了一个错误:

2016/08/05 17:16:24 [router.go:854][C] the request url is  /
2016/08/05 17:16:24 [router.go:855][C] Handler crashed with error <Ormer> table: `.` not found, maybe not RegisterModel
2016/08/05 17:16:24 [router.go:861][C] /usr/lib/go-1.6/src/runtime/asm_amd64.s:472
2016/08/05 17:16:24 [router.go:861][C] /usr/lib/go-1.6/src/runtime/panic.go:443
2016/08/05 17:16:24 [router.go:861][C] /home/hobbestigrou/go/src/github.com/astaxie/beego/orm/orm.go:110
2016/08/05 17:16:24 [router.go:861][C] /home/hobbestigrou/go/src/github.com/astaxie/beego/orm/orm.go:135
2016/08/05 17:16:24 [router.go:861][C] /home/hobbestigrou/go/src/github.com/hobbestigrou/mahewinsexyurl/controllers/default.go:47
2016/08/05 17:16:24 [router.go:861][C] /home/hobbestigrou/go/src/github.com/astaxie/beego/router.go:763
2016/08/05 17:16:24 [router.go:861][C] /usr/lib/go-1.6/src/net/http/server.go:2081
2016/08/05 17:16:24 [router.go:861][C] /usr/lib/go-1.6/src/net/http/server.go:1472
2016/08/05 17:16:24 [router.go:861][C] /usr/lib/go-1.6/src/runtime/asm_amd64.s:1998

我的错误是什么？

Answer 1

我发现我的错误是 Controller 的粗心错误:

ur := &models.ShortUrl{
    Domain: domain,
    Short:  short,
}

if created, _, err := o.ReadOrCreate(&ur, "Domain"); err == nil {
}

新版本是:

ur := models.ShortUrl{
    Domain: domain,
    Short:  short,
}

if created, _, err := o.ReadOrCreate(&ur, "Domain"); err == nil {
}

错误是双重使用 & 来工作并创建指向 ShortUrl 结构的指针。