ruby on rails app

This article is where I read Hugh wrote "Build Ruby on Rails development environment on Mac OS X", followed his steps and sorted it out. The content is basically consistent, adding some graphs. If you want to see the original content, look at the Hugh blog here. To install Ruby on Rails on a Mac, you first have to inst

Error MySQL: Error: Query: not connected: Create Table 'schema _ migrations '('version' varchar (255) not null) engine = InnoDB Solution; Ruby is 1.8.6, rails is 2.2.3, MySQL is 5.1.51 This problem occurs because the libmysql. dll file in MySQL 5.1.3 and later cannot be properly connected to rails. Therefore, you only need to replace an old version of lib

ActiveRecord programming guide in Ruby on Rails, rubyonrails Avoid modifying the default ActiveRecord (Table Name, primary key, and so on) unless you have a very good reason (such as a database not under your control ).Put the macro-style method before the class definition (has_many, validates, and so on ). Preference has_expect: through is better than has_and_belongs_to_expect. Has_validation: through allo

The following issues have been encountered recently in a ROR Web project: Products can be classified by class navigation browsing, can be divided into three types of a,b,c, three categories under the other categories, at the same time, the base class and its classification can be extended by the user. Horizontally, the main class can be extended by the user, and the user can extend it vertically. Category information Store and Categories table: Id:integer PRIMARY Key Name:string category Nam

After several days, the Ror environment was finally ready. In order to prevent future forgetting and minimize detours, we made a special record ========================================================== ===== Installation Process 1. Install rubyinstaller-1.9.2 2. install and execute gem install rails 3. Download dev kit and decompress it to the ruby installation directory. 4. Install Netbeans 6.9.1 5. Enabl

Http://www.songlin51.com/archives/667.html Ubuntu 12.04 redmine2.1 installation record When you install gem install rails, you cannot connect to rails. Solution: Search for railson http://rubygems.org/gems/railsto download rails. gem for installation. An error is reported when installing gem install mysql2.Building native extensions. This cocould take a while

error:in ' require ': Cannot load such file--sqlite3/sqlite3_native (Loaderror)Remove the D:\Ruby22-x64\lib\ruby\gems\2.2under Ruby first. 0 \cache Directory, then enter in cmd: Gem install Sqlite3, and finally into D:\Ruby22-x64\lib\ruby\gems\2.2. 0\specifications directory, find sqlite3-1.3. -x64-mingw32.gemspec file, change s.require_paths=["lib"to s.require_p

Let's take a look at some tips for debugging this time. First, and most importantly, writing test code, writing unit tests and functional tests in rails is simple, using them to reduce the rate of bugs, or to avoid bugs in your previous code. The test code tells you what works and what doesn't, and the test code helps you isolate the problematic code, because sometimes the bug doesn't show up quickly. If the problem occurs in a model, we can use th

A Brief Introduction to Ruby on Rails's support for PostgreSQL array types, railspostgresql I am very happy to announce that Rails 4.0 now supports PostgreSQL array types. you can easily create fields of the array type through: array => true in migration. you can also add other options (length, default, and so on) when creating an array field) create_table :table_with_arrays do |t| t.integer :int_array, :ar

Will_paginate (http://blog.csdn.net/kunshan_shenbin/article/details/4182610 ), Now we plan to integrate it into rails3. In addition, the Code also includes jqgrid integration. 1. Open gemfile and modify it as follows: gem 'rails', '3.2.13'#gem 'sqlite3'gem 'mysql2'gem 'thin'gem 'will_paginate', '~> 3.0'gem 'jquery-ui-rails' 2. Execute rails g controller Report

In the practice of agile development, the test drive is indispensable. This article looks at a test-driven development example in rails. Before we wrote and conducted some unit tests and functional tests, our customers suddenly asked to add a feature: Each user of the system could query the product. We first sketched some sketches to sort out our ideas and designs, and then we started writing code. We already have a general idea of what to do, but i

1. The microblog model is as follows:2, the creation of Weibo resources, the command is as follows:$ rails Generate scaffold micropost content:text User_id:integer #生成微博资源$ bundle EXEC Rake db:migrate #执行迁移, update the database, use the new data model3, the content of micro-blog restrictions(1) Limit the length of WeiboIn the APP/MODELS/MICROPOST.RBclass Micropost activerecord::base validates:content, lengt

| format.html Format.json {render json: @alljson} #这里会自动调用to_json end #render Json:lsjson #render JSON: {test: 1} End　　Ruby calls in JSON formatFirst JSON format NOTE:1, after the nodes to follow:, can not have spaces2, nodes, name these places cannot be enclosed in quotation marks, otherwise you cannot use Ruby to convert to JSON format.Simple_json = {nodes: [{name: ' Bob ', Age: ' $ ', awesome: ' true '}