Gain insights into Ruby on Rails fundamentals, creating projects, deploying, CRUD operations, user authentication, and session management. Build foundational skills to develop complex applications.

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In this course, you will learn the fundamentals of Ruby on Rails to build your own application.

You will start by learning how to create a new project, deploy to a Rails server, and the Rails design pattern. After that, you’ll learn how to perform CRUD operations, handle user authentication, and manage sessions.

Once you finish this course, you’ll have the foundations in place to build more complex applications to add to your portfolio.

Introduction to Ruby on Rails

# Test database
Since your application relies heavily on interactions with a database, you need to have one in your testing environment. Rails provides a dedicated test database allowing you to run your tests in isolation, without having to worry about tampering with your development database.

## Loading the database schema
To load the database schema for your test environment you will run:
```bash
rake db:schema:load RAILS_ENV=test
```
This loads the schema from your `db/schema.rb` file for your test database. 

> **Note:** This command will raise an error if there are any pending migrations.

## Populating the database

To populate your database, you need to use #concept=fixtures#fixtures#concept#. You will create the following entries in your `test/fixtures/links.yml` file (this file is auto-generated for your `Link` model when using scaffolding):
```
linkOne:
  url: mysite.com

linkTwo:
  title: myTitle
  url: anothersite.com
```

`linkOne` and `linkTwo` from your fixture file are `ActiveRecord` instances. This means you can use methods available to the `Link` class on them.
```bash
id1 = links(:linkOne).id
# the id of linkOne will be stored in id1
```

You will load the fixtures using the following command:
```bash
rake db:fixtures:load RAILS_ENV=test
```

>**Note:** Every Rails app has three environments: development, production, and test. You need to use `RAILS_ENV` to specify that you are using the *test* environment. 

<br>

Now that you have loaded your schema and added a few entries, you can begin writing your tests.


Learn about the test database, model testing in Rails, and write tests for your Link model.

Introduction to Ruby on Rails

CRUD on Rails

Your First Rails Application!

Comments

Testing

Conclusion

Model Testing

Test database

Loading the database schema

Populating the database