Join Kevin Skoglund for an in-depth discussion in this video Deleting records, part of Ruby on Rails 4 Essential Training.
…We've seen how to create and update records.…Now let's learn how to delete them.…The way we will delete records is to first find…the record that we want and then to destroy it.…So we find the record, and then we destroy it.…Now, notice that I'm using the word destroy here and not delete.…That's because the method that we're going to…be using is going to be called destroy.…There's also a method that's called delete.…Don't be confused by it.…It may seem to work the same as destroy, but delete…bypasses some rails features, and might give you some unexpected behavior.…
Destroy is the best method to stick with, as a beginner.…So if you're already in your Rails console that's fine.…You don't need to exit and go back in.…If you're not then you just want to make sure you're…in the root of your application and type rails console.…Once we're in there we're going to create a new subject.…Subject.create, and let's give this one just a name.…We're going to call it Bad subject.…Now I'm not assigning this to any…variable, I'm just going to be creating it.…
- 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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