283 lines
5.4 KiB
Markdown
283 lines
5.4 KiB
Markdown
<!-- {% raw %} -->
|
|
# 13.5 實現部落格的增刪改
|
|
|
|
前面介紹了 beego 框架實現的整體構思以及部分實現的虛擬碼，這小節介紹透過 beego 建立一個部落格系統，包括部落格瀏覽、新增、修改、刪除等操作。
|
|
## 部落格目錄
|
|
部落格目錄如下所示：
|
|
|
|
.
|
|
├── controllers
|
|
│ ├── delete.go
|
|
│ ├── edit.go
|
|
│ ├── index.go
|
|
│ ├── new.go
|
|
│ └── view.go
|
|
├── main.go
|
|
├── models
|
|
│ └── model.go
|
|
└── views
|
|
├── edit.tpl
|
|
├── index.tpl
|
|
├── layout.tpl
|
|
├── new.tpl
|
|
└── view.tpl
|
|
|
|
## 部落格路由
|
|
部落格主要的路由規則如下所示：
|
|
|
|
```Go
|
|
|
|
//顯示部落格首頁
|
|
beego.Router("/", &controllers.IndexController{})
|
|
//檢視部落格詳細資訊
|
|
beego.Router("/view/:id([0-9]+)", &controllers.ViewController{})
|
|
//建立部落格博文
|
|
beego.Router("/new", &controllers.NewController{})
|
|
//刪除博文
|
|
beego.Router("/delete/:id([0-9]+)", &controllers.DeleteController{})
|
|
//編輯博文
|
|
beego.Router("/edit/:id([0-9]+)", &controllers.EditController{})
|
|
```
|
|
|
|
## 資料庫結構
|
|
資料庫設計最簡單的部落格資訊
|
|
```sql
|
|
|
|
CREATE TABLE entries (
|
|
id INT AUTO_INCREMENT,
|
|
title TEXT,
|
|
content TEXT,
|
|
created DATETIME,
|
|
primary key (id)
|
|
);
|
|
```
|
|
## 控制器
|
|
IndexController:
|
|
|
|
```Go
|
|
|
|
type IndexController struct {
|
|
beego.Controller
|
|
}
|
|
|
|
func (this *IndexController) Get() {
|
|
this.Data["blogs"] = models.GetAll()
|
|
this.Layout = "layout.tpl"
|
|
this.TplName = "index.tpl"
|
|
}
|
|
```
|
|
ViewController:
|
|
|
|
```Go
|
|
|
|
type ViewController struct {
|
|
beego.Controller
|
|
}
|
|
|
|
func (this *ViewController) Get() {
|
|
id, _ := strconv.Atoi(this.Ctx.Input.Params()[":id"])
|
|
this.Data["Post"] = models.GetBlog(id)
|
|
this.Layout = "layout.tpl"
|
|
this.TplName = "view.tpl"
|
|
}
|
|
```
|
|
NewController
|
|
|
|
```Go
|
|
|
|
type NewController struct {
|
|
beego.Controller
|
|
}
|
|
|
|
func (this *NewController) Get() {
|
|
this.Layout = "layout.tpl"
|
|
this.TplName = "new.tpl"
|
|
}
|
|
|
|
func (this *NewController) Post() {
|
|
inputs := this.Input()
|
|
var blog models.Blog
|
|
blog.Title = inputs.Get("title")
|
|
blog.Content = inputs.Get("content")
|
|
blog.Created = time.Now()
|
|
models.SaveBlog(blog)
|
|
this.Ctx.Redirect(302, "/")
|
|
}
|
|
```
|
|
EditController
|
|
|
|
```Go
|
|
|
|
type EditController struct {
|
|
beego.Controller
|
|
}
|
|
|
|
func (this *EditController) Get() {
|
|
id, _ := strconv.Atoi(this.Ctx.Input.Params()[":id"])
|
|
this.Data["Post"] = models.GetBlog(id)
|
|
this.Layout = "layout.tpl"
|
|
this.TplName = "edit.tpl"
|
|
}
|
|
|
|
func (this *EditController) Post() {
|
|
inputs := this.Input()
|
|
var blog models.Blog
|
|
blog.Id, _ = strconv.Atoi(inputs.Get("id"))
|
|
blog.Title = inputs.Get("title")
|
|
blog.Content = inputs.Get("content")
|
|
blog.Created = time.Now()
|
|
models.SaveBlog(blog)
|
|
this.Ctx.Redirect(302, "/")
|
|
}
|
|
```
|
|
DeleteController
|
|
|
|
```Go
|
|
|
|
type DeleteController struct {
|
|
beego.Controller
|
|
}
|
|
|
|
func (this *DeleteController) Get() {
|
|
id, _ := strconv.Atoi(this.Ctx.Input.Params()[":id"])
|
|
blog := models.GetBlog(id)
|
|
this.Data["Post"] = blog
|
|
models.DelBlog(blog)
|
|
this.Ctx.Redirect(302, "/")
|
|
}
|
|
```
|
|
## model 層
|
|
|
|
```Go
|
|
|
|
package models
|
|
|
|
import (
|
|
"database/sql"
|
|
"github.com/astaxie/beedb"
|
|
_ "github.com/ziutek/mymysql/godrv"
|
|
"time"
|
|
)
|
|
|
|
type Blog struct {
|
|
Id int `PK`
|
|
Title string
|
|
Content string
|
|
Created time.Time
|
|
}
|
|
|
|
func GetLink() beedb.Model {
|
|
db, err := sql.Open("mymysql", "blog/astaxie/123456")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
orm := beedb.New(db)
|
|
return orm
|
|
}
|
|
|
|
func GetAll() (blogs []Blog) {
|
|
db := GetLink()
|
|
db.FindAll(&blogs)
|
|
return
|
|
}
|
|
|
|
func GetBlog(id int) (blog Blog) {
|
|
db := GetLink()
|
|
db.Where("id=?", id).Find(&blog)
|
|
return
|
|
}
|
|
|
|
func SaveBlog(blog Blog) (bg Blog) {
|
|
db := GetLink()
|
|
db.Save(&blog)
|
|
return bg
|
|
}
|
|
|
|
func DelBlog(blog Blog) {
|
|
db := GetLink()
|
|
db.Delete(&blog)
|
|
return
|
|
}
|
|
```
|
|
|
|
## view 層
|
|
|
|
layout.tpl
|
|
```html
|
|
|
|
<html>
|
|
<head>
|
|
<title>My Blog</title>
|
|
<style>
|
|
#menu {
|
|
width: 200px;
|
|
float: right;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<ul id="menu">
|
|
<li><a href="/">Home</a></li>
|
|
<li><a href="/new">New Post</a></li>
|
|
</ul>
|
|
|
|
{{.LayoutContent}}
|
|
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
index.tpl
|
|
```html
|
|
|
|
<h1>Blog posts</h1>
|
|
|
|
<ul>
|
|
{{range .blogs}}
|
|
<li>
|
|
<a href="/view/{{.Id}}">{{.Title}}</a>
|
|
from {{.Created}}
|
|
<a href="/edit/{{.Id}}">Edit</a>
|
|
<a href="/delete/{{.Id}}">Delete</a>
|
|
</li>
|
|
{{end}}
|
|
</ul>
|
|
```
|
|
view.tpl
|
|
```html
|
|
|
|
<h1>{{.Post.Title}}</h1>
|
|
{{.Post.Created}}<br/>
|
|
|
|
{{.Post.Content}}
|
|
```
|
|
new.tpl
|
|
```html
|
|
|
|
<h1>New Blog Post</h1>
|
|
<form action="" method="post">
|
|
標題:<input type="text" name="title"><br>
|
|
內容：<textarea name="content" colspan="3" rowspan="10"></textarea>
|
|
<input type="submit">
|
|
</form>
|
|
```
|
|
edit.tpl
|
|
```html
|
|
|
|
<h1>Edit {{.Post.Title}}</h1>
|
|
|
|
<h1>New Blog Post</h1>
|
|
<form action="" method="post">
|
|
標題:<input type="text" name="title" value="{{.Post.Title}}"><br>
|
|
內容：<textarea name="content" colspan="3" rowspan="10">{{.Post.Content}}</textarea>
|
|
<input type="hidden" name="id" value="{{.Post.Id}}">
|
|
<input type="submit">
|
|
</form>
|
|
```
|
|
## links
|
|
* [目錄](<preface.md>)
|
|
* 上一節：[日誌和配置設計](<13.4.md>)
|
|
* 下一節：[小結](<13.6.md>)
|
|
<!-- {% endraw %} -->
|