blogs rails crud

使用rails创建一个新的项目，blogs 在远程也创建项目，进行git init .创建连接

首先，使用scaffold 直接创建表格和列

bundle exec rails genreate scaffold blogs title:string content:string

创建数据表

bundle exec rake db:migrate

修改环境文件

app/controllers/application_controller.rbclass ApplicationController < ActionController::Base# Prevent CSRF attacks by raising an exception.# For APIs, you may want to use :null_session instead.#注释下边这一行#protect_from_forgery with: :exception
end

修改路由

class BlogsController < ApplicationControllerbefore_action :get_by_id,:only =>[:show,:destroy,:edit,:update]def index@blogs = Blogputs "--------------------hihih"@blogs = @blogs.where('name like ? ', "%#{params[:blog_title]}%") if params[:blog_title].present?@blogs = @blogs.where('address like ? ', "%#{params[:blog_content]}%") if params[:blog_content].present?@blogs = @blogs.page(params[:page]).per(30)puts "-------end--index-----------hihih"enddef new@blog = Blog.new@blog.title = params[:blog_title]@blog.time = params[:blog_time]@blog.content = params[:blog_content]@blog.save!enddef createputs("==params is: ")blog.create(  { :time => params[:time], :title=> params[:title], :content => params[:content] }  )redirect_to blogs_pathenddef editenddef update#@blog = Blog.find(params[:id])puts "=== in update, before : #{@blog.inspect}"@blog.title = params[:blog_title]@blog.time = params[:blog_time]@blog.content = params[:blog_content]@blog.save!puts "=== in update, after: #{@blog.inspect}"redirect_to blogs_pathenddef showputs "==== im show"enddef destroy@blog.deleteredirect_to blogs_pathendprivatedef get_by_id@blog = Blog.find(params[:id])end
end

渲染页面app/views/layouts/application.html.erb

<!DOCTYPE html>
<html><head><title>Blogs</title><%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %><%= javascript_include_tag 'application', 'data-turbolinks-track' => true %><%= csrf_meta_tags %><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"><script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script><script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script><script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script></head><body><div> application.html.erb</div><%= yield %></body>
</html>

编辑页面 app/views/blogs/edit.html.erb

<h3>编辑</h3>
<%= render 'form', blog: @blog %><br/>
<%= link_to '详情', @blog %> |
<%= link_to '返回', @blog_path %>

form 页面app/views/blogs/_form.html.erb

<%= form_for @blog do |form| %><teble class='table table-striped table-hover table-border'><tr><th style="width: 150px;">标题</th><td> <%= form.text_field :title,class: "form-control" %></td></tr><tr><th>content</th><td> <%= form.text_field : contenet,class: "form-control" %></td></tr>
<%= end %>

列表页面app/views/blogs/index.html.erb

<h3>列表</h3>博客总数<%= @total_ count  %>
<br/>
<%= paginate @blogs %><table class="table table-striped"><% @blogs.each do |blog| %><tr><td ><a href="/blogs/<%= blog.id %>" > <%= blog.id %> <%= blog.title %> </a></td><td><%=blog.title %></td><td><%=blog.content %></td><td><%= link_to "编辑", edit_blog_path(:id => blog.id) %><%= link_to "删除",blog,:method => :delete, class: 'btn btn-primary' %></td></tr><% end %>
</table><br/><%= link_to "新建", new_blog_path %><br/>

新建页面app/views/blogs/new.html.erb

<h3>新建页面</h3>
<%= render 'form', blog: @blog %>
<br/>
<%= link_to "返回",blogs_path %>

详情页面app/views/blogs/show.html.erb

<table class='table table-striped table-hover table-border'><tr><th style="width:150px;">标题</th><td><%= @blog.title %></td><td></td></tr><tr><th>内容</th><td><%= @blog.content %></td><td></td></tr>
</table><br/>
<%= link_to'返回',blogs_path, class: 'btn btn-primary' %>

使用hash routes.rb

Rails.application.routes.draw do resources :blogs docollection doget :listendendnamespace :interface doresources :blogs docollection doget :allendendendend

增加文件

app/controllers/interface/blogs_controller.rb

module Interfaceclass BlogsController < ApplicationControllerdef all#blog = Blog.first#result = {#  id: blog.id,#  title: blog.title,#  content: blog.content#}result = Blog.all.map do |blog|# 这个是返回值，在map 中，不能写return, 默认返回最后一行代码的值{id: blog.id,title: blog.title,content: blog.content}endrender json: resultendend
end

使用分页Gemfile


source 'https://rubygems.org'gem 'kaminari'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.8'
# Use sqlite3 as the database for Active Record
#gem 'sqlite3'
#gem 'mysql2'
#gem 'mysql2', '~> 0.3.18'
gem 'pg', '0.18.4'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.

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