Add sqlite3 gem and adapter

for development and testing

Gemfile

@@ -7,6 +7,8 @@ ruby '3.0.1'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
 gem 'rails', '~> 6.1.4'
+# Use sqlite3 as the database for Active Record - for testing and development environment
+gem 'sqlite3', '~> 1.4'
 # Use Postgres as the database for Active Record
 gem 'pg'
 # Use Puma as the app server

Gemfile.lock

@@ -193,6 +193,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    sqlite3 (1.4.2)
     thor (1.1.0)
     tilt (2.0.10)
     turbolinks (5.2.1)
@@ -241,6 +242,7 @@ DEPENDENCIES
   sass-rails (>= 6)
   selenium-webdriver
   spring
+  sqlite3 (~> 1.4)
   turbolinks (~> 5)
   tzinfo-data
   web-console (>= 4.1.0)

config/database.yml

@@ -1,19 +1,20 @@
 default: &default
-  adapter: postgresql
+  adapter: sqlite3
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   timeout: 5000
 
 development:
   <<: *default
-  database: ruby_magic_blog_development
+  database: db/development.sqlite3
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 test:
   <<: *default
-  database: ruby_magic_blog_test
+  database: db/test.sqlite3
 
 production:
   <<: *default
   database: ruby_magic_blog_production
+  url: <%= ENV['DATABASE_URL'] %>