Second Commit

db/migrate/20210410023431_devise_create_users.rb

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+# frozen_string_literal: true
+
+class DeviseCreateUsers < ActiveRecord::Migration[6.1]
+  def change
+    create_table :users do |t|
+      ## Database authenticatable
+      t.string :email,              null: false, default: ""
+      t.string :encrypted_password, null: false, default: ""
+
+      ## Recoverable
+      t.string   :reset_password_token
+      t.datetime :reset_password_sent_at
+
+      ## Rememberable
+      t.datetime :remember_created_at
+
+      ## Trackable
+      # t.integer  :sign_in_count, default: 0, null: false
+      # t.datetime :current_sign_in_at
+      # t.datetime :last_sign_in_at
+      # t.string   :current_sign_in_ip
+      # t.string   :last_sign_in_ip
+
+      ## Confirmable
+      # t.string   :confirmation_token
+      # t.datetime :confirmed_at
+      # t.datetime :confirmation_sent_at
+      # t.string   :unconfirmed_email # Only if using reconfirmable
+
+      ## Lockable
+      # t.integer  :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
+      # t.string   :unlock_token # Only if unlock strategy is :email or :both
+      # t.datetime :locked_at
+
+
+      t.timestamps null: false
+    end
+
+    add_index :users, :email,                unique: true
+    add_index :users, :reset_password_token, unique: true
+    # add_index :users, :confirmation_token,   unique: true
+    # add_index :users, :unlock_token,         unique: true
+  end
+end

db/migrate/20210410031101_create_libraries.rb

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+class CreateLibraries < ActiveRecord::Migration[6.1]
+  def change
+    create_table :libraries do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20210410031337_create_books.rb

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+class CreateBooks < ActiveRecord::Migration[6.1]
+  def change
+    create_table :books do |t|
+      t.string :title
+      t.string :author
+      t.integer :genre
+      t.integer :sub_genre
+      t.integer :pages
+      t.string :publisher
+      t.integer :copies
+      t.belongs_to :library
+      t.timestamps
+    end
+  end
+end

db/migrate/20210410080157_create_users_books.rb

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+class CreateUsersBooks < ActiveRecord::Migration[6.1]
+  def change
+    create_table :users_books do |t|
+      t.references :user, null: false, foreign_key: true
+      t.references :book, null: false, foreign_key: true
+      
+      t.timestamps
+    end
+  end
+end

db/migrate/20210410142326_add_admin_to_users.rb

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+class AddAdminToUsers < ActiveRecord::Migration[6.1]
+  def change
+    add_column :users, :admin, :boolean, default: false
+  end
+end

db/migrate/20210411024808_add_status_identifier_to_users_books.rb

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+class AddStatusIdentifierToUsersBooks < ActiveRecord::Migration[6.1]
+  def change
+    add_column :users_books, :status, :integer
+    add_column :users_books, :identifier, :string
+    add_column :users_books, :returned_at, :datetime
+  end
+end

db/schema.rb

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+# 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.
+#
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 2021_04_11_024808) do
+
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
+  create_table "books", force: :cascade do |t|
+    t.string "title"
+    t.string "author"
+    t.integer "genre"
+    t.integer "sub_genre"
+    t.integer "pages"
+    t.string "publisher"
+    t.integer "copies"
+    t.bigint "library_id"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["library_id"], name: "index_books_on_library_id"
+  end
+
+  create_table "libraries", force: :cascade do |t|
+    t.string "name"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
+  create_table "users", force: :cascade do |t|
+    t.string "email", default: "", null: false
+    t.string "encrypted_password", default: "", null: false
+    t.string "reset_password_token"
+    t.datetime "reset_password_sent_at"
+    t.datetime "remember_created_at"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.boolean "admin", default: false
+    t.index ["email"], name: "index_users_on_email", unique: true
+    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
+  end
+
+  create_table "users_books", force: :cascade do |t|
+    t.bigint "user_id", null: false
+    t.bigint "book_id", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.integer "status"
+    t.string "identifier"
+    t.datetime "returned_at"
+    t.index ["book_id"], name: "index_users_books_on_book_id"
+    t.index ["user_id"], name: "index_users_books_on_user_id"
+  end
+
+  add_foreign_key "users_books", "books"
+  add_foreign_key "users_books", "users"
+end

db/seeds.rb

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+# This file should contain all the record creation needed to seed the database with its default values.
+# The data can then be loaded with the bin/rails db:seed command (or created alongside the database with db:setup).
+#
+# Examples:
+#
+#   movies = Movie.create([{ name: 'Star Wars' }, { name: 'Lord of the Rings' }])
+#   Character.create(name: 'Luke', movie: movies.first)
+require 'csv'
+library = Library.find_or_create_by(name: 'The Modern Library')
+
+CSV.foreach(Rails.public_path.join('books_data.csv'), headers: true) do |row|
+  datum = row.to_h
+  datum['genre']= datum['genre'].to_sym
+  datum['sub_genre']= datum['sub_genre'].to_sym
+  Book.find_or_create_by(datum.merge!(library_id: library.id))
+end