![]() ![]() When a user of a Rails application selects an action, e.g., "Show" - the controller will execute any code in the appropriate section - "def show" - and then by default will render a template of the same name - "". You can perform any Create, Read, Delete, or Edit operation using these available methods. This file has all the methods implemented automatically. If you open app/controllers/recipes_controller.rb, you will find something as follows −įormat.xml This code is generated by the scaffold generator. Let's look at the code behind the controller. Now, let's examine what has happened behind the scene. ![]() However, the above command will generate the following messages −Ĭreate app/views/layouts/Ĭreate app/controllers/recipes_controller.rbĬreate test/functional/recipes_controller_test.rbĬreate db/migrate/20080614192220_create_recipes.rb ![]() Note a singular name Recipe to create a plural table name recipes. By running scaffold as a script, generate the model, plus scaffolding, and the database migration script needed as well as a controller, helper, and testing support files as follows −Ĭookbook> ruby script/generate scaffold Recipe title:string \ With the scaffold action, Rails generates all the code it needs dynamically. Database Table DefinitionĪssuming the following structure for our recipes table − This application uses the same database for each. Rails lets you run in the development mode, test mode, or production mode, using different databases. NOTE − You can use similar settings for other database adapters in case you want to use any other database except MySQL. When you finish, it should look as follows − To instruct Rails to locate the database, edit the configuration file ~\cookbook\config\database.yml and change the database name to cookbook. Mysql> grant all privileges on cookbook.* We can specify any other database name like oracle or postgress using -d option. Here we are using -d mysql option to specify our interest to use MySQL database. Run the following command to create complete directory structure and required. Open a command window and navigate to where you want to create this cookbook web application. − Creating an Empty Rails Web Application To understand scaffolding, let’s create a database called cookbook and a table called recipes. Ruby on Rails 2.0 changes the way Rails uses scaffolding. You can use the scaffolding as a foundation to jumpstart your development. You can learn how Rails works by looking at generated code. You can quickly get code in front of your users for feedback. Scaffolding provides more than cheap demo thrills. While you're developing Rails applications, especially those which are mainly providing you with a simple interface to data in a database, it can often be useful to use the scaffold method. ![]()
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