add balance entity

app/controllers/admin/balances_controller.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+module Admin
+  class BalancesController < Admin::ApplicationController
+  end
+end

app/controllers/admin/currencies_controller.rb

@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 module Admin
   class CurrenciesController < Admin::ApplicationController
+    def valid_action?(name, resource = resource_class)
+      ["new", "edit", "destroy"].exclude?(name.to_s) && super
+    end
   end
 end

app/dashboards/balance_dashboard.rb

@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+require "administrate/base_dashboard"
+
+class BalanceDashboard < Administrate::BaseDashboard
+  # ATTRIBUTE_TYPES
+  # a hash that describes the type of each of the model's fields.
+  #
+  # Each different type represents an Administrate::Field object,
+  # which determines how the attribute is displayed
+  # on pages throughout the dashboard.
+  ATTRIBUTE_TYPES = {
+    user: Field::BelongsTo,
+    currency: Field::BelongsTo,
+    id: Field::Number,
+    amount: Field::String.with_options(searchable: false),
+    created_at: Field::DateTime,
+    updated_at: Field::DateTime,
+  }.freeze
+
+  # COLLECTION_ATTRIBUTES
+  # an array of attributes that will be displayed on the model's index page.
+  #
+  # By default, it's limited to four items to reduce clutter on index pages.
+  # Feel free to add, remove, or rearrange items.
+  COLLECTION_ATTRIBUTES = [:user, :currency, :id, :amount].freeze
+
+  # SHOW_PAGE_ATTRIBUTES
+  # an array of attributes that will be displayed on the model's show page.
+  SHOW_PAGE_ATTRIBUTES = [:user, :currency, :id, :amount, :created_at, :updated_at].freeze
+
+  # FORM_ATTRIBUTES
+  # an array of attributes that will be displayed
+  # on the model's form (`new` and `edit`) pages.
+  FORM_ATTRIBUTES = [:user, :currency, :amount].freeze
+
+  # COLLECTION_FILTERS
+  # a hash that defines filters that can be used while searching via the search
+  # field of the dashboard.
+  #
+  # For example to add an option to search for open resources by typing "open:"
+  # in the search field:
+  #
+  #   COLLECTION_FILTERS = {
+  #     open: ->(resources) { resources.where(open: true) }
+  #   }.freeze
+  COLLECTION_FILTERS = {}.freeze
+
+  # Overwrite this method to customize how balances are displayed
+  # across all pages of the admin dashboard.
+  #
+  # def display_resource(balance)
+  #   "Balance ##{balance.id}"
+  # end
+end

app/dashboards/currency_dashboard.rb

@@ -46,7 +46,7 @@ class CurrencyDashboard < Administrate::BaseDashboard
   # Overwrite this method to customize how currencies are displayed
   # across all pages of the admin dashboard.
   #
-  # def display_resource(currency)
-  #   "Currency ##{currency.id}"
-  # end
+  def display_resource(currency)
+    currency.name
+  end
 end

app/models/balance.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: balances
+#
+#  id          :bigint           not null, primary key
+#  amount      :decimal(20, 10)  default(0.0), not null
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#  currency_id :bigint           not null
+#  user_id     :bigint           not null
+#
+# Indexes
+#
+#  index_balances_on_currency_id  (currency_id)
+#  index_balances_on_user_id      (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (currency_id => currencies.id)
+#  fk_rails_...  (user_id => users.id)
+#
+class Balance < ApplicationRecord
+  belongs_to :user
+  belongs_to :currency
+
+  validates :amount, presence: true
+end

app/models/user.rb

@@ -25,6 +25,7 @@ class User < ApplicationRecord
     :recoverable, :rememberable, :validatable
 
   has_many :documents, class_name: "UserDocument", dependent: :destroy
+  has_many :balances, dependent: :restrict_with_error
 
   validates :first_name, :last_name, :email, presence: true
   validates :email, uniqueness: true

config/locales/activerecord.yml

@@ -5,9 +5,16 @@ pt-BR:
         one: Documentos de Usuário
         other: Documentos de Usuários
       admin_user:
-        one: Usuário Administrador
-        other: Usuários Administradores
+        one: Administrador
+        other: Administradores
+      currency:
+        one: Moeda
+        other: Moedas
+      balance:
+        one: Saldo
+        other: Saldos
     attributes:
       user:
         first_name: Primeiro nome
         last_name: Último nome
+        full_name: Nome completo

config/routes.rb

@@ -5,7 +5,7 @@ Rails.application.routes.draw do
 
   namespace :admin do
     resources :users
-    resources :user_documents
+    resources :balances
     resources :currencies
     resources :admin_users
 

db/migrate/20210811121726_create_balances.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+class CreateBalances < ActiveRecord::Migration[6.1]
+  def change
+    create_table(:balances) do |t|
+      t.references(:user, null: false, foreign_key: true)
+      t.references(:currency, null: false, foreign_key: true)
+
+      t.decimal(:amount, precision: 20, scale: 10, null: false, default: 0)
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_08_11_014107) do
+ActiveRecord::Schema.define(version: 2021_08_11_121726) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -55,6 +55,16 @@ ActiveRecord::Schema.define(version: 2021_08_11_014107) do
     t.index ["reset_password_token"], name: "index_admin_users_on_reset_password_token", unique: true
   end
 
+  create_table "balances", force: :cascade do |t|
+    t.bigint "user_id", null: false
+    t.bigint "currency_id", null: false
+    t.decimal "amount", precision: 20, scale: 10, default: "0.0", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["currency_id"], name: "index_balances_on_currency_id"
+    t.index ["user_id"], name: "index_balances_on_user_id"
+  end
+
   create_table "currencies", force: :cascade do |t|
     t.string "name", null: false
     t.datetime "created_at", precision: 6, null: false
@@ -85,5 +95,7 @@ ActiveRecord::Schema.define(version: 2021_08_11_014107) do
 
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
+  add_foreign_key "balances", "currencies"
+  add_foreign_key "balances", "users"
   add_foreign_key "user_documents", "users"
 end

db/seeds.rb

@@ -1,8 +1,18 @@
 # frozen_string_literal: true
-# 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)
+
+AdminUser.create(email: "admin@example.com", password: "password")
+
+user = User.create!(
+  first_name: "Test",
+  last_name: "User",
+  email: "user@example.com",
+  password: "password"
+)
+
+currency = Currency.create!(name: "CAKE")
+
+Balance.create!(
+  user_id: user.id,
+  currency_id: currency.id,
+  amount: 153124.72088
+)

spec/models/balance_spec.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: balances
+#
+#  id          :bigint           not null, primary key
+#  amount      :decimal(20, 10)  default(0.0), not null
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#  currency_id :bigint           not null
+#  user_id     :bigint           not null
+#
+# Indexes
+#
+#  index_balances_on_currency_id  (currency_id)
+#  index_balances_on_user_id      (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (currency_id => currencies.id)
+#  fk_rails_...  (user_id => users.id)
+#
+require "rails_helper"
+
+RSpec.describe(Balance, type: :model) do
+  describe "validations" do
+    it { is_expected.to(validate_presence_of(:amount)) }
+  end
+
+  describe "associations" do
+    it { is_expected.to(belong_to(:user)) }
+    it { is_expected.to(belong_to(:currency)) }
+  end
+end

spec/models/user_spec.rb

@@ -31,5 +31,6 @@ RSpec.describe(User, type: :model) do
 
   describe "associations" do
     it { is_expected.to(have_many(:documents)) }
+    it { is_expected.to(have_many(:balances)) }
   end
 end