wdi-sg / activerecord-intro-exercise

[activerecord][ruby][exercise]

Tunr 1.0!

Local Setup

Create your schema.sql:

DROP TABLE IF EXISTS songs;
DROP TABLE IF EXISTS artists;

CREATE TABLE artists(
  id SERIAL PRIMARY KEY,
  name TEXT,
  photo_url TEXT,
  nationality TEXT
);

CREATE TABLE songs(
  id SERIAL PRIMARY KEY,
  title TEXT,
  album TEXT,
  preview_url TEXT,
  artist_id INT
);

create your Gemfile

source "https://rubygems.org"
gem "pg"  # this gem allows ruby to talk to postgres
gem "activerecord"  # this gem provides a connection between your ruby classes to relational database tables
gem "byebug"  # this gem allows access to REPL

bundle install
createdb tunr_db
psql -d tunr_db < schema.sql
psql -d tunr_db < seeds.sql

Create your artist class:

class Artist < ActiveRecord::Base
  # AR classes are singular and capitalized by convention
end

Part 1.1 - Use your Artist Model

In the console:

1. Find all artists
2. Find just one artist by id
3. Find Taylor Swift (or your other fav artist) by name.
4. Find all artists from the USA
5. Find all artists NOT from the USA
6. Create a new artist for your favorite artist
7. Change at least 2 of their attributes
8. Destroy the artist you just created

• (NOTE: If you destroy other artists at this point, you'll need to reseed your data for consistency.)

further

Add another column to your artists table called year with type integer by editing your db/schema.sql file. Then run reset your schema via the command line. Populate each artist with the appropriate year of origin.

further

Use Active Record queries to find all artists:

• since 2000
• between 1970 and 1995
• not in 2004 or 2015