Learn-Sinatra

on lesssion

sinatra learn

1. sinatra 介绍

sinatra是一个更加简洁的ruby web框架

2. sinatra 文档

2.1 初步的文件结构

Rakefile, Gemfile, config.ru, main.rb

2.2 activerecord

rake -T #查看所有的rake命令
rake db:create_migration NAME=create_posts #此处是生成的一个数据库表

#在db/migrate/xxxxxxx.rb中会有这样的代码
class CreatePosts < ActiveRecord::Migration
    def change
        #这里面添加一些相关的操作
        #create_table :posts do |t|
            t.string :title
            .....
        #end
        #add_column, remove_column
    end
end

更多的操作参考

3. templates

3.1 erb

erb :index #views/index.erb

code = "this is code text"
erb code   # return text or 

erb :index, :layout => 'false'

3.2 static files

set :public_folder, File.dirname(__FILE__) + '/static'

4. filter

4.1 before, after

before get 'xxxxxx' do # get can be post
end

before do
    #can do some conditions
    
    if request.path_info == 'xxxxx'
    end

end

一些request的请求细节

5. helper

5.1 helper

helpers do 
    def xxx
    end
end

5.2 halt

这个是结束当前的动作，直接返回规定的值

5.3 set or enable

5.3.1 set 参考上面的静态文件

set :session_secret, 'super secret'
set :sessions, :domain => 'foo.com'
......

5.3.2 enable

enable :sessions

5.3.3 Triggering Another Route

5.3.4 Setting Body, Status Code and Headers

5.4. redirect

redirect to('/bar?sum=42')
redirect back
redirect 'http://google.com', 'wrong place, buddy'