Ruby on Rails 笔记

学习rails时记下的笔记

Rails 环境

rails console					# Loading development environment
rails console test				# Loading test environment
rails console production			# Loading production environment
rails console --sandbox				# sandbox
rails server --environment production		# server production

controller [plural]

rails generate controller Sessions home help		# generate 命令可以接收一个可选的参数列表,创建首页、帮助页面
rails generate controller PasswordResets new edit --no-test-framework
rails destroy  controller StaticPages 			# 撤销staticpages controller
rails destroy  controller StaticPages home help

model

1 2	rails generate model User name:string email:string rails destroy model User

migration

rails generate migration add_index_to_users_email			# generate migration index
rails generate migration add_admin_to_users admin:boolean		# add filed
rails generate migration add_password_digest_to_users password_digest:string
rails generate migration add_reset_to_users reset_digest:string reset_sent_at:datetime

执行 migrate

rails db:migrate
rails db:rollback
rails db:migrate VERSION=0
rails db:migrate:reset			#reset db

integration_test模版

1 2	rails generate integration_test site_layout rails generate integration_test users_signup

测试

测试驱动开发使用“遇红-变绿-重构”循环

rails test
rails test:integration					# 只执行集成测试
rails test:models					# 执行model测试【待验证】
rails test test/integration/users_login_test.rb		# 执行单个文件测试

mailer

1	rails generate mailer UserMailer account_activation password_reset

uploader

1	rails generate uploader Picture

页面操作

link_to

1 2	<%= link_to "(forgot password)", new_password_reset_path %> <%= link_to "Reset password", edit_password_reset_url(@user.reset_token, email: @user.email) %>

update_attribute

1 2	update_attribute(:name, "El Duderino") update_columns(activated: true, activated_at: Time.zone.now)

assert_*

assert_select "div"						<div>foobar</div>
assert_select "div", "foobar"					<div>foobar</div>
assert_select "div.nav"						<div class="nav">foobar</div>
assert_select "div#profile"					<div id="profile">foobar</div>
assert_select "div[name=yo]"					<div name="yo">hey</div>
assert_select "a[href=?]", '/', count: 1			<a href="/">foo</a>
assert_select "a[href=?]", '/', text: "foo"			<a href="/">foo</a>
assert_select "input[name=email][type=hidden][value=?]", user.email
	<input id="email" name="email" type="hidden" value="michael@example.com" />
assert_template 'static_pages/home'
assert_response :success
assert_equal full_title, "Ruby on Rails"		# 判断两个值相等，full_title是一个方法

other

app/assets/stylesheets/application.css
*= require_tree .
会把 app/assets/stylesheets 目录中的所有 CSS 文件（包含子目录中的文件）都引入应用的 CSS 文件。
*= require_self
会把 application.css 这个文件中的 CSS 也加载进来。

下载一个图片

1	curl -o app/assets/images/rails.png -OL railstutorial-china.org/assets/images/rails.png