本章节学习下beego的文章添加、编辑、删除以及展示功能。

controllers文件夹下添加topic.go文件，源码：

package controllers

import (
	"github.com/astaxie/beego"
	"myapp/models"
)

type TopicController struct {
	beego.Controller
}

func (this *TopicController) Get() {
	this.Data["isActive"] = "topic"
	this.TplName = "topic.html"
	this.Data["IsLogin"] = checkAccount(this.Ctx)

	topics, err := models.GetAllTopics(false)
	if err != nil {
		beego.Error(err)
	}
	this.Data["Topics"] = topics
}

func (this *TopicController) Post() {
	if !checkAccount(this.Ctx) {
		this.Redirect("/login", 302)
		return
	}

	// 解析表单
	tid := this.Input().Get("tid")
	title := this.Input().Get("title")
	content := this.Input().Get("content")

	var err error
	if len(tid) == 0 {
		err = models.AddTopic(title, content)
	} else {
		err = models.ModifyTopic(tid, title, content)
	}

	if err != nil {
		beego.Error(err)
	}

	this.Redirect("/topic", 302)
}

func (this *TopicController) Add() {
	if !checkAccount(this.Ctx) {
		this.Redirect("/login", 302)
		return
	}

	this.Data["isActive"] = ""
	this.TplName = "topic_add.html"
}

func (this *TopicController) Delete() {
	if !checkAccount(this.Ctx) {
		this.Redirect("/login", 302)
		return
	}

	err := models.DeleteTopic(this.Input().Get("tid"))
	if err != nil {
		beego.Error(err)
	}

	this.Redirect("/topic", 302)
}

func (this *TopicController) Modify() {
	this.TplName = "topic_modify.html"
	this.Data["isActive"] = ""

	tid := this.Input().Get("tid")
	topic, err := models.GetTopic(tid)
	if err != nil {
		beego.Error(err)
		this.Redirect("/", 302)
		return
	}
	this.Data["Topic"] = topic
	this.Data["Tid"] = tid
}

func (this *TopicController) View() {
	this.TplName = "topic_view.html"
	this.Data["isActive"] = ""

	topic, err := models.GetTopic(this.Ctx.Input.Params()["0"])
	if err != nil {
		beego.Error(err)
		this.Redirect("/", 302)
		return
	}
	this.Data["Topic"] = topic

}

models文件夹下models.go添加：

func AddTopic(title, content string) error {
	o := orm.NewOrm()

	topic := &Topic{
		Title:     title,
		Content:   content,
		Created:   time.Now(),
		Updated:   time.Now(),
		ReplyTime: time.Now(),
	}
	_, err := o.Insert(topic)
	return err
}

func GetTopic(tid string) (*Topic, error) {
	tidNum, err := strconv.ParseInt(tid, 10, 64)
	if err != nil {
		return nil, err
	}

	o := orm.NewOrm()

	topic := new(Topic)

	qs := o.QueryTable("topic")
	err = qs.Filter("id", tidNum).One(topic)
	if err != nil {
		return nil, err
	}

	topic.Views++
	_, err = o.Update(topic)
	return topic, nil
}

func ModifyTopic(tid, title, content string) error {
	tidNum, err := strconv.ParseInt(tid, 10, 64)
	if err != nil {
		return err
	}

	o := orm.NewOrm()
	topic := &Topic{Id: tidNum}
	if o.Read(topic) == nil {
		topic.Title = title
		topic.Content = content
		topic.Updated = time.Now()
		o.Update(topic)
	}
	return nil
}

func DeleteTopic(tid string) error {
	tidNum, err := strconv.ParseInt(tid, 10, 64)
	if err != nil {
		return err
	}

	o := orm.NewOrm()

	topic := &Topic{Id: tidNum}
	_, err = o.Delete(topic)
	return err
}

func GetAllTopics(isDesc bool) (topics []*Topic, err error) {
	o := orm.NewOrm()

	topics = make([]*Topic, 0)

	qs := o.QueryTable("topic")
	if isDesc {
		_, err = qs.OrderBy("-created").All(&topics)
	} else {
		_, err = qs.All(&topics)
	}
	return topics, err
}

其他文件修改：
home.go添加文章的展示，和文章列表很类似的修改
route.go 添加：

beego.Router("/topic", &controllers.TopicController{})
beego.AutoRouter(&controllers.TopicController{})

views文件夹下添加topic的各种模板

最后运行，bee run myapp。出来如下图：

github：https://github.com/yangsir/beego_study