Join Kevin Skoglund for an in-depth discussion in this video One-to-many associations, part of Ruby on Rails 4 Essential Training.
…We saw how to use one-to-one associations in the previous movie.…Let's build on that to understand how…to work with one-to-many associations in Rails.…One-to-many associations are similar to one-to-one…associations in the way that they work.…There are 3 main differences that I want to highlight.…First, one-to-many associations are much more commonly used.…In a typical application, you'll rarely use one-to-one associations.…But one to many will probably be the association you'll use most often.…Second, because we have one object that's related to…many objects, we use a plural name for the relationship.…
Third, the relationship will return an array…of objects instead of a single object.…So we'll be working with arrays here rather than a single instance.…You use a one-to-many association when one object…has many objects which belong to it exclusively.…For example, a photographer has many photographs.…The photographs all belong to a single photographer.…And to that photographer exclusively.…Style has many products.…
- 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 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
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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