我在ruby中完全是新手,但我想出瞭如何創建數據庫。 我這樣做Ruby On Rails從表格中獲得
rails generate scaffold MYTABLENAME
,並在db /遷移我編輯的文件,以便它有我的專欄等
class CreateUsers < ActiveRecord::Migration
def change
create_table :users do |t|
t.string :username
t.string :password
t.string :email
t.timestamps
end
end
end
這是正確的嗎?
現在,我得到這樣的輸出:
invoke active_record
create db/migrate/20130325134909_create_posts.rb
create app/models/post.rb
invoke test_unit
create test/unit/post_test.rb
create test/fixtures/posts.yml
invoke resource_route
route resources :posts
invoke scaffold_controller
create app/controllers/posts_controller.rb
invoke erb
create app/views/posts
create app/views/posts/index.html.erb
create app/views/posts/edit.html.erb
create app/views/posts/show.html.erb
create app/views/posts/new.html.erb
create app/views/posts/_form.html.erb
invoke test_unit
create test/functional/posts_controller_test.rb
invoke helper
create app/helpers/posts_helper.rb
invoke test_unit
create test/unit/helpers/posts_helper_test.rb
invoke assets
invoke coffee
create app/assets/javascripts/posts.js.coffee
invoke scss
create app/assets/stylesheets/posts.css.scss
invoke scss
create app/assets/stylesheets/scaffolds.css.scss
invoke active_record
create db/migrate/20130325134909_create_posts.rb
create app/models/post.rb
invoke test_unit
create test/unit/post_test.rb
create test/fixtures/posts.yml
invoke resource_route
route resources :posts
invoke scaffold_controller
create app/controllers/posts_controller.rb
invoke erb
create app/views/posts
create app/views/posts/index.html.erb
create app/views/posts/edit.html.erb
create app/views/posts/show.html.erb
create app/views/posts/new.html.erb
create app/views/posts/_form.html.erb
invoke test_unit
create test/functional/posts_controller_test.rb
invoke helper
create app/helpers/posts_helper.rb
invoke test_unit
create test/unit/helpers/posts_helper_test.rb
invoke assets
invoke coffee
create app/assets/javascripts/posts.js.coffee
invoke scss
create app/assets/stylesheets/posts.css.scss
invoke scss
create app/assets/stylesheets/scaffolds.css.scss
它也很好聽。但爲什麼會自動插入
app/views/posts/index.html.erb
app/views/posts/edit.html.erb
app/views/posts/show.html.erb
app/views/posts/new.html.erb
app/views/posts/_form.html.erb
等等?這是標準嗎?如果是這樣 - 爲什麼?請解釋。
而另一個問題是: 在我的家庭控制器(作爲標準../home/index)我試圖創建一個用戶到我新的新鮮的數據庫,但它告訴我,未初始化的常量HomeController :: Users - 爲什麼?
這裏是我的代碼:
class HomeController < ApplicationController
def index
#@users = User.all
o = Users.new
o.username = "Jesper"
o.save
end
end
嗯,你可能要檢查出許多偉大的初學者教程軌之一。 http://railsforzombies.org/ http://ruby.railstutorial.org/ruby-on-rails-tutorial-book – mhutter 2013-03-25 14:08:08
你的代碼有很多問題。首先:你還沒有創建數據庫。您爲您的應用程序創建了所謂的腳手架,但該數據庫尚未創建。你的控制器的問題是你應該使用'User'而不是'Users'。請遵循初學者教程。如果您遇到這種情況,請使用Google。仍然卡住?在這裏提出具體問題。 – Mischa 2013-03-25 14:11:51
http://guides.rubyonrails.org/getting_started.html#getting-up-and-running-quickly-with-scaffolding會回答你的第一個問題。你可以在同一個網站上找到第二個問題的答案:) – siekfried 2013-03-25 14:12:22