Rails 3 in action 读书笔记

那天看到IE有战友贴了这个书，就想找个时间读读，有收获随笔记下来收获

据说这种格式validate可以多个写一起，不用重复

validates :description, :presence => true, :length => { :minimum => 10 }

这个nested很多地方有了，codeschool railscast和guide

project_ticket_path(@project, @ticket)

这个是关联的，就是相当于project_id:integer

rails generate model ticket title:string description:text project:references

初始化一个关联实例

def new
@ticket = @project.tickets.build
end

<% @project.tickets.each do |ticket| %>
<li>
#<%= ticket.id %> - <%= link_to ticket.title, [@project, ticket] %>

没记着steps

Given /^I am signed in as them$/ do
steps(%Q{
Given I am on the homepage
When I follow "Sign in"
And I fill in "Email" with "#{@user.email}"
And I fill in "Password" with "password"
And I press "Sign in"
Then I should see "Signed in successfully."
})
end

let和before的差别是，before是所有context都加载，let只有context里用到user才加载

describe ProjectsController do
  let(:user) do
    user = Factory(:user)
    user.confirm!
    user
  end

  context "standard users" do
    it "cannot access the new action" do
      sign_in(:user, user)
    end
  end

  context "standard users" do
  it "cannot access the new action" do
    sign_in(:user, user)
    get :new
    response.should redirect_to(root_path)
    flash[:alert].should eql("You must be an admin to do that.")
  end
  end

  { "new" => "get",
  "create" => "post",
  "edit" => "get",
  "update" => "put",
  "destroy" => "delete" }.each do |action, method|
  it "cannot access the #{action} action" do
    sign_in(:user, user)
    send(method, action.dup, :id => project.id)
    response.should redirect_to(root_path)
    flash[:alert].should eql("You must be an admin to do that.")
  end
  end

...
end

其中用到的Factory Girl定义如下

#factories/user_factory.rb:
Factory.define :user do |user|
  user.sequence(:email) { |n| "user#{n}@ticketee.com" }
  user.password "password"
  user.password_confirmation "password"
end
#其中sequence用于产生不重复的数字，以便生成email不重复

rspec要加载上Fatorygirl定义的User，还要处理一个lib调用include上

#spec/support/factories.rb
#spec/controllers/projects_controller_spec.rb
Dir[Rails.root + "factories/*.rb"].each do |file|
  require file
end

Rspec用到了sign_in所以要加载devise到rspec

RSpec.configure do |config|
  config.mock_with :rspec
  config.include Devise::TestHelpers
end

说到rspec看这个更舒服
http://pure-rspec-scotruby.heroku.com/

cucumber里检查页面是否存在元素context_contain capybara的语法

#features/step_definitions/link_steps.rb
Then /^I should see the "([^\"]*)" link$/ do |text|
  page.should(have_css("a", :text => text),
  "Expected to see the #{text.inspect} link, but did not.")
end
Then /^I should not see the "([^\"]*)" link$/ do |text|
  page.should_not(have_css("a", :text => text),
  "Expected to not see the #{text.inspect} link, but did.")
end

检查是否admin

- admins_only do
  = link_to "New Project", new_project_path

def admins_only(&block)
  block.call if current_user.try(:admin?)
  nil
end