ruby on rails coffeescript

In the previous section, we demonstrated how to build a list of items, and this time we built a simple shopping cart based on the previous content. 1. First we want to create a table that holds customer shopping information: Database scripts: drop table if exists line_items; CREATE TABLE Line_items ( ID int not NULL auto_increment, product_id int not null, quantity int NOT null DEFAU Lt 0, unit_price decimal (10,2) NOT NULL, constraint fk_items_product foreign key (product_id) references Pro

The last Test Modeul problem has not been resolved, but the following to continue, this time to test controller. 1. In the test\functional directory, rails has generated a corresponding test file for our controller, and note that Application_controller does not generate test files. Let's take control of the login Logincontroller as an example, open the LOGIN_CONTROLLER_TEST.RB, which reads as follows: Require File.dirname (__file__) + '/... /test_h

The most frequently run query on a database is to return a conforming result set based on a specified condition, and the query may be to return all the names ' Dave's order, or all the titles on a blog with rails, in many other frameworks and programming languages, you need to create SQL to execute queries, and Active record takes advantage of the dynamic capabilities that the Ruby language contains. For e

Because in some cases you want to use a nonexistent column, or you want to create a new virtual modelYou can create a new tableless.rb under concerns under models, with the following code:Module tablelessdef self.included (Base)Base.extend (Classmethods)Base.send (: Include,instancemethods)EndModule Instancemethodsdef save (Validate = True)Validate? Valid? : TrueEndEndModule Classmethodsdef column (name, Sql_type = nil, default = nil, NULL = TRUE)Columns sql_type.to_s, NULL)Enddef columns@column

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

Modify viewsModify the index view (app/views/posts/index.html.erb) and add the edit link as follows:That is, add the following logic: Among them, Edit_post_path, is the previous "[Ruby on Rails] and I learned route map" referred to the edit action prefix added a shortcut after the _path suffix, can accept parameters, here accept the post instance object.Then edit the view and copy the new view as an edit v

Using form to create data, this section will cover the content: Create form, redirect user, render views and flash messages.1. Views PreliminaryEdit App/views/posts/index.html.erb This view file as follows:New_post is the new action's prefix, referring to [Ruby on Rails] and I learned the route map, but after it added the _path suffix.Then edit the App/views/posts/new.html.erb view file as follows:2. Bindin

rewrite_modulemodules/mod_rewrite.so annotation. 2.0 previous versions were said to be modified in 2 places: LoadModule rewrite_module libexec/httpd/mod_rewrite.so and addmodule mod_rewrite.c Add Model: /app/models/post.php Code: ?PhpRequire_once('cake/app_model.php');ClassPostExtendsAppmodel {Public$name='Post';Public$validate=Array('Title' => valid_not_empty , } IMG src= "yun_qi_img/20081022215650208.gif" alt= "Capture cake (Ruby