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

working4.tar.gz

default

hello

crud migration

crud CR

crud app1

redd

testing

votable_fix

CRUD new1

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

## Problem statement
In the previous lesson, you may have come across an error in the line for `index.html.erb`:
```
<% if current_user.liked? link %>
```
This error occurs in case no user is signed-in. The `current_user` call will return `nil`, so you cannot make a valid call to `.liked?`.

Run the application, sign-in, and create a new link. Once the link is created sign-out, you will receive an error.

Your challenge is to fix the error by checking whether a user is signed-in or not. 

In case no user is signed-in, the like button will not be displayed.

<br>

## Implementation


# Problem statement
In the previous lesson, you may have come across an error in the line for `index.html.erb`:
```
<% if current_user.liked? link %>
```
This error occurs in case no user is signed-in. The `current_user` call will return `nil`, so you cannot make a valid call to `.liked?`.

Run the application, sign-in, and create a new link. Once the link is created sign-out, you will receive an error.

Your challenge is to fix the error by checking whether a user is signed-in or not. 

In case no user is signed-in, the like button will not be displayed.

<br>

# Implementation


Fix a logical issue in your application by solving this challenge.

Introduction to Ruby on Rails

CRUD on Rails

Your First Rails Application!

Comments

Create a Bill Split Application Using Ruby on Rails

Testing

Conclusion

Basic Challenge: Sign-in Status

Problem statement