Add proper configuration for Postgres database and add Post model

Author: marclerodrigues

.gitignore

@@ -23,3 +23,4 @@
 .byebug_history
 /public/packs
 /node_modules
+/coverage

app/models/post.rb

@@ -0,0 +1,3 @@
+class Post < ApplicationRecord
+  validates :title, :content, presence: true
+end

config/database.yml

@@ -1,25 +1,23 @@
-# SQLite version 3.x
-#   gem install sqlite3
-#
-#   Ensure the SQLite 3 gem is defined in your Gemfile
-#   gem 'sqlite3'
-#
-default: &default
-  adapter: sqlite3
-  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+development: &default
+  adapter: postgresql
+  database: blog_development
+  encoding: utf8
+  min_messages: warning
+  pool: <%= Integer(ENV.fetch("DB_POOL", 5)) %>
+  reaping_frequency: <%= Integer(ENV.fetch("DB_REAPING_FREQUENCY", 10)) %>
   timeout: 5000
+  host: postgres
+  username: postgres
 
-development:
-  <<: *default
-  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: db/test.sqlite3
+  database: blog_test
 
-production:
-  <<: *default
-  database: db/production.sqlite3
+production: &deploy
+  encoding: utf8
+  min_messages: warning
+  pool: <%= [Integer(ENV.fetch("MAX_THREADS", 5)), Integer(ENV.fetch("DB_POOL", 5))].max %>
+  timeout: 5000
+  url:  <%= ENV.fetch("DATABASE_URL", "") %>
+
+staging: *deploy

db/migrate/20170429141050_create_posts.rb

@@ -0,0 +1,10 @@
+class CreatePosts < ActiveRecord::Migration[5.1]
+  def change
+    create_table :posts do |t|
+      t.string :title
+      t.text :content
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -0,0 +1,25 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20170429141050) do
+
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
+  create_table "posts", force: :cascade do |t|
+    t.string "title"
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+end

spec/models/post_spec.rb

@@ -0,0 +1,6 @@
+require 'rails_helper'
+
+RSpec.describe Post, type: :model do
+  it { is_expected.to validate_presence_of :title }
+  it { is_expected.to validate_presence_of :content }
+end