Join Kevin Skoglund for an in-depth discussion in this video Create action: Create, part of Ruby on Rails 4 Essential Training.
…In this movie, we will write the create…action and learn to process the form values.…Earlier, we saw how to add the new action and to create a form for a new record.…New and create work together as a pair, and…together they make up the create portion of crud.…New displays the form, create processes the form.…Let's look at the four main steps in processing a form.…First, we instantiate a new object using the form parameters.…Next, we attempt to save that object.…If the save succeeds, we will redirect to somewhere.…In our case, we will redirect to the index action.…
The save fails, we want to redisplay the form, so…that the user can fix the problems and resubmit it.…You might be wondering how the save could fail.…We haven't put any data validation into…our application yet, but eventually we will.…Data validation ensures that the data received from the form…matches the criteria for data allowed to go into the database.…For example, if we want to limit the subject's…name to 50 characters, then we add data validation…
- 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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