Users are interested in browsing online news covering various topics while being able to filter news articles by category and author, like certain news articles, and view a bar chart of likes per day for any news article.

Web application solution backend will be built in Ruby on Rails (any version greater than or equal to 6.0) and consist of the following features:

• Web page for listing news articles (displaying for each news article: title, publication date, author, category, total like count, and body excerpt with no more than 200 characters, ending with “…”).
• Web page for viewing the content of a specific news article (title, publication date, author, category, total like count, and body, rendered as HTML)
• Filter news articles by category and/or author (ensure that filters can be combined)
• A rake task (rake import:news_articles) to load news articles into the database from /data directory (relative to project root), containing manually unzipped news_app_data.zip files (e.g. /data/news_articles.csv and corresponding HTML files like /data /montreal_hawks_minor_league_baseball_team_wins_championship.html ). Assume /data/news_articles.csv is always well-formed (contains all attribute values and no repeated unique titles) and is always accompanied by all news article HTML files.
• The solution must consist of Rails route(s), Rails controller(s), ERB view(s), ActiveRecord-model(s), ActiveRecord-migration(s), and optionally extra Ruby classes/modules. You may design software layers and the database any way you deem fit. Rails Scaffolding is acceptable. news_app_data.zip must be manually unzipped in /data directory relative to the project root, and then afterwards processed with rake task (rake import:news_articles) to import into the database. It is OK to submit /data directory along with project files.
• The news article model must validate that the title is unique, and that the title, body, author, publication_date, and category are present. Also, if your model layer includes other models, ensure they have validations that ensure data integrity as well.
• The rake task (rake import:news_articles) must be idempotent.
• All backend code except the rake task must be covered by automated tests (i.e. models and controllers). RSpec, MiniTest, or any other testing library is acceptable.

• Models and Controller tests must be included

• Ruby version 2.7+
• Rails version 6+

• Users are able to view list of all available articles

  • Article attributes are displayed in the list
  • Filters are included, which allow filtering bby author and category

• Users are able to navigate to a single article

  • Article attribute data is displayed on page
  • Statistics on article likes are displayed using a bar graph

Users must have the ability to add a new or updated csv file to the /data directory and import data using a rake task.

Data maintains the following format:

"Montreal Hawks Minor League Baseball Team Wins Championship","2029-10-17","Sports","Aaron Bishop","2029- 10-17:15|2029-10-18:20|2029-10-19:30|2029-10-20:25|2029-10-21:32|2029-10-22:28|2029-10-23:40"

That translates to the following news article meta-data:

• title: "Montreal Hawks Minor League Baseball Team Wins Championship"
• publication_date: "2029-10-17"
• category: "Sports"
• author: "Aaron Bishop"
• like_counts_per_date:
  • 2029-10-17: 15 likes
  • 2029-10-18: 20 likes
  • 2029-10-19: 30 likes
  • 2029-10-20: 25 likes
  • 2029-10-21: 32 likes
  • 2029-10-22: 28 likes
  • 2029-10-23: 40 likes

• Database is PostgreSQL instead of SQLite
• Users are not able to update article field using data import
• Users are not able to delete articles using the data import.