Join Kevin Skoglund for an in-depth discussion in this video Generating migrations, part of Ruby on Rails 4 Essential Training.
…Now that we understand what a migration is, and…why migrations are helpful, let's create our first one.…Migrations are going to reside in the db directory, in the root…of our project, the same place that the schema.rb file was added.…The db directory is the place to keep everything related to the database.…We're going to generate a new migration that will appear in that directory.…We're going to do that from the command line.…You want to make sure you're in the root of your Rails project.…You can type rails generate, and you'll remember that if you hit Return now,…it will return a list of the things that it knows how to generate.…
One of those things is a migration.…If we were hit Return now.…It would offer us some helpful guidance about how to write migrations.…But we're going to just go ahead and provide…the name of the migration that we want to create next.…We're going to do that in what's called camel case.…I'm going to name it DoNothingYet.…It's called camel case because those capitals in…the middle popup like the humps of a camel.…
- Why use Ruby on Rails?
- Installing Ruby on Rails on Mac and Windows
- Rendering templates and redirecting requests
- Generating and running database migrations
- Creating, updating, and deleting records
- Understanding association types
- Using layouts, partials, and view helpers
- Incorporating assets using asset pipeline
- Validating form data
- Authenticating users and managing user access
- Architecting RESTful applications
- Debugging and error handing
Skill Level Intermediate
1. What Is Ruby on Rails?
2. Installing Ruby on Rails on a Mac
3. Installing Ruby on Rails on a Windows Machine
4. Getting Started
5. Controllers, Views, and Dynamic Content
6. Databases and Migrations
7. Models, ActiveRecord, and ActiveRelation
9. Controllers and CRUD
10. Layouts, Partials, and View Helpers
13. Data Validation
14. User Authentication
15. Improving the Simple CMS
16. REST and RESTful Routes
17. Debugging and Error Handling
18. Introducing More Advanced Topics
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