The Full Stack Web Development - Data Validation & Listing Data

The video tutorial explains how to validate a title field in a model by making it required and setting a minimum length. It then covers editing the controller to handle post submissions, including redirecting or rendering views based on success or failure. The tutorial also demonstrates how to display error messages using Bootstrap alerts and loops. Finally, it shows how to list all posts on an index page, including adding links to individual post pages.

What is the minimum length set for the title field in the validation?

• 10 characters

• 5 characters

• No minimum length

• 3 characters

Which method is used to check if a post was saved successfully?

• post.save?

• post.save!

• if post.save

• post.save

What is the purpose of the 'presence' validation in the model?

• To ensure the field is unique

• To make the field required

• To allow null values

• To set a default value

How are error messages displayed to the user in the form?

• Using JavaScript alerts

• By logging errors to the console

• By looping through errors and displaying them with Bootstrap classes

• By redirecting to an error page

What Bootstrap class is used to style error messages?

• alert-danger

• alert-success

• alert-warning

• alert-info

Which method is used to fetch all posts from the model?

• Post.find_all

• Post.get_all

• Post.all

• Post.fetch_all

What is the purpose of the 'link_to' method in the view?

• To create a hyperlink to another page

• To validate form inputs

• To fetch data from the server

• To style the page with CSS