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Rails2’s template and respond_to method

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Rails2’s template and respond_to method
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Rails2’s template(respond_to method)可以怎麼玩?ihower@handlino.comabout me• 張文鈿 (a.k.a ihower)http://ihower.idv.tw/blog/• 和多(Handlino) 鐵道員• 主持 http://registrano.com 開發agenda• Ruby on Rails overview• respond_to (what’s format you want)• template (how to generate format)Rails Overview• an open-source web framework for developing database-backed web applications• Model-View-Control pattern• a pure-Ruby development environment, from the Ajax in the view, to the request and response in the controller, to the domain model wrapping the database.Browser決定哪一個MVCController 和 ActionModel-View-ControlHTTP requestGET /users/1route.rbUsersControllerModeldef show@user = User.find(params[:id])Databaserespond_to do |format|format.htmlformat.xmlend#show.html.erbendViewdef index<html>...... <h1>User Profile</h1>end <p><%= @user.nickname %></p></html>endrespond_to你要什麼格式?One Action, Multiple Response Formatsdef index@users = User.find(:all)respond_to do |format| format.html # index.html.erb format.xml { render :xml => @user.to_xml }endendformat.html<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head><body> <p> ihower at 2008-01-19 </p></body></html>format.xml<?xml version="1.0" encoding="UTF-8"?><user> <created-at type="datetime">2008-01-19T09:55:32+08:00</created-at> <id type="integer">2</id> <name>ihower</name> <updated-at type="datetime">2008-01-19T09:55:32+08:00</updated-at></user>you don't need this!def show_html@users = User.find(:all)enddef show_xml@users = User.find(:all)render :xml => @user.to_xmlenddef show_json@user = User.find(:all)render :json => @user.to_jsonend只需定義一個 action減少重複的程式碼Don’t repeat yourself

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