# Validations In Controller Actions Lab

## Validations In Controller Actions Lab

Time to apply these new tools!

The goal of this lab is to allow users of this blog-style application to create and edit authors and posts without worrying about typos or other mistakes leading to error-prone form submissions.

For example, if someone creates a blog post with less than 100 characters of content, it's likely that they accidentally pasted the wrong text, or misunderstood which information goes into which field. We can improve the user's experience and the stability of our codebase by notifying users about these kinds of mistakes _before_ bad data gets into the database.

## Objectives

* Define validations on a model
* Use the validation state of a model in a response conditional in an action
* Re-render a form with validation errors
* Validate a create action
* Validate an update action

## Requirements

Make sure you run `rake db:seed` so you have some data to work with (defined in `db/seeds.rb`).

This is a barebones app with two models, `Author` and `Post`. Right now, you can...

* [View an author](http://localhost:3000/authors/1)
* [View a post](http://localhost:3000/posts/1)
* [Create an author](http://localhost:3000/authors/new)
* [Edit a post](http://localhost:3000/posts/1/edit)

To complete this lab, you will need to:

1. Add validations to `Author` such that...
2. The name cannot be blank
3. The e-mail is unique
4. Add validations to `Post` such that...
5. The title cannot be blank
6. The category is either `"Fiction"` or `"Non-Fiction"`
7. The content is at least 100 characters long.
8. Change `AuthorsController#create` to re-render the form if the new author is invalid.
9. Change `PostsController#update` to re-render the form if the updated post is invalid.

Clone : [https://github.com/learn-co-curriculum/validations-in-controller-actions-rails-lab](https://github.com/learn-co-curriculum/validations-in-controller-actions-rails-lab)
