- Create a dynamic route
- Use the params hash in the controller
We'll continue building our API for viewing student data. In this lesson, we'll add a route and controller action for displaying data about one individual student.
To get set up, run:
$ bundle install
$ rails db:migrate db:seedThis will download all the dependencies for our app and set up the database.
In this lab, we'll add the last feature to our student management app. You will need to integrate the following scenario in your application:
-
The user is able to go to a URL with the student's ID (i.e.
/students/2) to receive information on the student. -
The application should render the values from the student record with the corresponding ID in the database.
You can try out your solution by running rails s and visiting
localhost:3000/students/2 in the browser.
There are two failing RSpec specs in this lesson; you can find them in
spec/requests/student_spec.rb. Make sure they pass without breaking the other
tests. To complete this lesson, all specs should pass by running learn test.
If you've used other APIs, or investigated some URLs as you've browsed the internet, you may have noticed some URLs have this special syntax:
https://www.google.com/search?q=breadThat ?q=bread portion of the URL is known as a
query string parameter. Query string parameters are another
way of providing data in a request. They're structured as key-value pairs, like
so:
/students?key1=value1&key2=value2Rails gives us access to these query string parameters as part of the params hash:
params
# => { key1: "value1", key2: "value2" }As a bonus deliverable:
Un-comment out the last test in /spec/requests/students_spec.rb to complete the bonus.
- Use query params in the
indexaction to return a list of all students whose first or last name matches the query parameter.