Join Kevin Skoglund for an in-depth discussion in this video Delete actions: Delete/destroy, part of Ruby on Rails 4 Essential Training.
…We've seen how to create, read, and update records from the controller.…The last part of CRUD is delete.…We'll see how to add that in this movie.…You'll remember that delete can be defined…by two standard Rails actions, delete and destroy.…Like the other form actions we've seen, delete…displays a form and destroy processes that form.…There are a few other key points to be aware of.…Delete also wants an ID value.…It makes sense, we can't destroy a record in the database if we can't find it.…We need to have an ID to reference the record that we want.…
When it processes the form, destroy is going to find…the subject and then call the destroy method on it.…Remember that in active records there's also a method called Delete.…We want to make sure that we're using the method Destroy.…We talked about the reasons why earlier.…You maybe wondering what does the delete form look like.…I mean after all when we're deleting something, we're not editing any values.…The delete page mostly serves as a conformation page.…To make sure that we don't accidentally delete something that we didn't mean to.…
- 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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