If you're a programmer, it's inevitable that you'll come up against errors from time to time. When something does go wrong, you'll find the error that occurred in one of three places: the code, browser, or application log file. In this online video, you'll learn about errors in Ruby on Rails 4, and discover how to locate and resolve them.
…Bugs and errors are a fact of life in programming.…In this chapter, we're going to look at the tools and…the techniques to help you to work through them when they occur.…Of course most bugs are going to happen…during development, while you're actually writing the code.…And in development, errors show up in three places.…In your browser, in your rail server console, and in the application log files.…Let's intentionally create some errors in our demo controller.…And then take a look at all three of these locations to see the differences.…So inside our controllers, inside demo controller, we're going to add a new…action down here to the bottom, and we're going to call it make error.…
And I'm going to paste in code for what I believe are the three most common errors.…The first error that we're going to take a look at is a syntax error.…I don't have a closing parenthesis after the string test, and I should.…It's very common to make typos in your…code that keep Ruby from understanding what you mean.…You might forgot a closing curly brace on a hash,…
- 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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