Join Kevin Skoglund for an in-depth discussion in this video Using the positionMove module, part of Ruby on Rails 3 Essential Training.
In the previous movie, we added a module called PositionMover to the Lib…directory of our application, and we discussed how we can include modules into…Ruby classes in order to add their methods and functionality to that class.…Well, now that we've the module, we're ready to include it and make use of its functionality.…There are two areas we're going to look at.…The first is going to be the models.…We're going to want to include the module, so we get that functionality added to…our model so that it gains the intelligence that that module has in about how to…move positions around.…
We're also going to want to make sure that we follow the good practice of…requiring that module file before we include it.…Just to make sure that it's loaded. Rails should loaded for us, but requiring it…says you know what, it's required in order to use this class properly.…We need to make sure that we have the PositionMover.…That's now a dependency of this file.…We're also going to want to account for position scope for some of our classes.…
- Understanding MVC (Model View Controller ) architecture
- Routing browser requests through the framework
- Responding to requests with dynamic content
- Defining associations and database relationships
- Creating, reading, updating and deleting records
- Working with forms
- Validating form data
- Reviewing built-in security features
- Authenticating users and managing user access
- Debugging and error handling
Skill Level Beginner
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
12. Data Validation
13. User Authentication
14. Improving the Simple CMS
15. Debugging and Error Handling
16. Introducing More Advanced Topics
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