- Use the session hash to persist data across multiple requests
In this lab, you'll be building out a blog paywall feature by using the session hash to keep track of how many page views a user has made.
There is some starter code in place for a Rails API backend and a React frontend. To get set up, run:
bundle install
rails db:migrate db:seed
npm install --prefix client
You can work on this lab by running the tests with learn test
. It will also be
helpful to see what's happening during the request/response cycle by running the
app in the browser. You can run the Rails server with:
rails s
And you can run React in another terminal with:
npm start --prefix client
You don't have to make any changes to the React code to get this lab working.
Our app will keep track of how many blog posts a user has viewed by using the
session
hash. Each user can view a maximum of three articles before seeing
the paywall.
When a user makes a GET
request to /articles/:id
, the following should happen:
- If this is the first request this user has made, set
session[:pageviews_remaining]
to an initial value of 3. Hint: consider using||=
to set this initial value - For every request to
/articles/:id
, decrement the value ofsession[:pageviews_remaining]
by 1. - If
session[:pageviews_remaining]
has a value greater than 0, render a JSON response with the article data. - If
session[:pageviews_remaining]
as a value of 0 or less, render a JSON response including an error message, and a status code of 401 unauthorized.