Assignment 3 - DB Diagram, ActiveRecord  Create another database diagram for a major website that you haven’t made a database diagram for before. Table names should be plural and underscores (users, some_table_names) as well as column names. Identify the datatype of each column. Label primary and foreign keys. Finally, illustrate the associations between each database table  Create a Rails app from the ground up with a User model and an Article model using the rails model generator. Associate the two models so you can make queries like User.last.articles and Article.first.user (Hint: One user has_many articles).