add transaction

* added category relation
* added shoulda-matchers gem
* added TargetRubyVersion to rubocop config

.rubocop.yml

@@ -14,6 +14,7 @@ AllCops:
     - node_modules/**/*
     - lib/tasks/*
   NewCops: enable
+  TargetRubyVersion: 3.2.2
 
 Rails/I18nLocaleTexts:
   Enabled: false

Gemfile

@@ -34,5 +34,6 @@ group :test do
   gem 'rubocop-performance', require: false
   gem 'rubocop-rails', require: false
   gem 'rubocop-rspec', require: false
+  gem 'shoulda-matchers'
   gem 'webdrivers'
 end

Gemfile.lock

@@ -271,6 +271,8 @@ GEM
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
+    shoulda-matchers (6.0.0)
+      activesupport (>= 5.2.0)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
       rack (>= 2.2.4, < 4)
@@ -331,6 +333,7 @@ DEPENDENCIES
   rubocop-performance
   rubocop-rails
   rubocop-rspec
+  shoulda-matchers
   sprockets-rails
   stimulus-rails
   turbo-rails

app/controllers/transactions_controller.rb

@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+class TransactionsController < ApplicationController
+  before_action :set_transaction, only: %i[show edit update destroy]
+
+  # GET /transactions or /transactions.json
+  def index
+    @transactions = Transaction.all
+  end
+
+  # GET /transactions/1 or /transactions/1.json
+  def show; end
+
+  # GET /transactions/new
+  def new
+    @transaction = Transaction.new
+  end
+
+  # GET /transactions/1/edit
+  def edit; end
+
+  # POST /transactions or /transactions.json
+  def create
+    @transaction = Transaction.new(transaction_params)
+
+    respond_to do |format|
+      if @transaction.save
+        format.html { redirect_to transaction_url(@transaction), notice: 'Transaction was successfully created.' }
+        format.json { render :show, status: :created, location: @transaction }
+      else
+        format.html { render :new, status: :unprocessable_entity }
+        format.json { render json: @transaction.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /transactions/1 or /transactions/1.json
+  def update
+    respond_to do |format|
+      if @transaction.update(transaction_params)
+        format.html { redirect_to transaction_url(@transaction), notice: 'Transaction was successfully updated.' }
+        format.json { render :show, status: :ok, location: @transaction }
+      else
+        format.html { render :edit, status: :unprocessable_entity }
+        format.json { render json: @transaction.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /transactions/1 or /transactions/1.json
+  def destroy
+    @transaction.destroy!
+
+    respond_to do |format|
+      format.html { redirect_to transactions_url, notice: 'Transaction was successfully destroyed.' }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+
+  # Use callbacks to share common setup or constraints between actions.
+  def set_transaction
+    @transaction = Transaction.find(params[:id])
+  end
+
+  # Only allow a list of trusted parameters through.
+  def transaction_params
+    params.require(:transaction).permit(:date, :amount, :description, :category_id)
+  end
+end

app/helpers/transactions_helper.rb

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+module TransactionsHelper
+end

app/models/category.rb

@@ -2,4 +2,6 @@
 
 class Category < ApplicationRecord
   validates :name, uniqueness: true, presence: true
+
+  has_many :transactions, dependent: :nullify
 end

app/models/transaction.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class Transaction < ApplicationRecord
+  validates :amount, presence: true
+  validates :date, presence: true
+  validates :description, presence: true
+
+  belongs_to :category, optional: true
+end

app/views/transactions/_form.html.erb

@@ -0,0 +1,37 @@
+<%= form_with(model: transaction) do |form| %>
+  <% if transaction.errors.any? %>
+    <div style="color: red">
+      <h2><%= pluralize(transaction.errors.count, "error") %> prohibited this transaction from being saved:</h2>
+
+      <ul>
+        <% transaction.errors.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div>
+    <%= form.label :date, style: "display: block" %>
+    <%= form.date_field :date %>
+  </div>
+
+  <div>
+    <%= form.label :amount, style: "display: block" %>
+    <%= form.number_field :amount %>
+  </div>
+
+  <div>
+    <%= form.label :description, style: "display: block" %>
+    <%= form.text_field :description %>
+  </div>
+
+  <div>
+    <%= form.label :category_id, style: "display: block" %>
+    <%= form.text_field :category_id %>
+  </div>
+
+  <div>
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/transactions/_transaction.html.erb

@@ -0,0 +1,22 @@
+<div id="<%= dom_id transaction %>">
+  <p>
+    <strong>Date:</strong>
+    <%= transaction.date %>
+  </p>
+
+  <p>
+    <strong>Amount:</strong>
+    <%= transaction.amount %>
+  </p>
+
+  <p>
+    <strong>Description:</strong>
+    <%= transaction.description %>
+  </p>
+
+  <p>
+    <strong>Category:</strong>
+    <%= transaction.category_id %>
+  </p>
+
+</div>

app/views/transactions/_transaction.json.jbuilder

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+json.extract! transaction, :id, :date, :amount, :description, :category_id, :created_at, :updated_at
+json.url transaction_url(transaction, format: :json)

app/views/transactions/edit.html.erb

@@ -0,0 +1,10 @@
+<h1>Editing transaction</h1>
+
+<%= render "form", transaction: @transaction %>
+
+<br>
+
+<div>
+  <%= link_to "Show this transaction", @transaction %> |
+  <%= link_to "Back to transactions", transactions_path %>
+</div>

app/views/transactions/index.html.erb

@@ -0,0 +1,14 @@
+<p style="color: green"><%= notice %></p>
+
+<h1>Transactions</h1>
+
+<div id="transactions">
+  <% @transactions.each do |transaction| %>
+    <%= render transaction %>
+    <p>
+      <%= link_to "Show this transaction", transaction %>
+    </p>
+  <% end %>
+</div>
+
+<%= link_to "New transaction", new_transaction_path %>

app/views/transactions/index.json.jbuilder

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+json.array! @transactions, partial: 'transactions/transaction', as: :transaction

app/views/transactions/new.html.erb

@@ -0,0 +1,9 @@
+<h1>New transaction</h1>
+
+<%= render "form", transaction: @transaction %>
+
+<br>
+
+<div>
+  <%= link_to "Back to transactions", transactions_path %>
+</div>

app/views/transactions/show.html.erb

@@ -0,0 +1,10 @@
+<p style="color: green"><%= notice %></p>
+
+<%= render @transaction %>
+
+<div>
+  <%= link_to "Edit this transaction", edit_transaction_path(@transaction) %> |
+  <%= link_to "Back to transactions", transactions_path %>
+
+  <%= button_to "Destroy this transaction", @transaction, method: :delete %>
+</div>

app/views/transactions/show.json.jbuilder

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+json.partial! 'transactions/transaction', transaction: @transaction

config/routes.rb

@@ -1,4 +1,5 @@
 Rails.application.routes.draw do
+  resources :transactions
   resources :categories
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 

db/migrate/20231230212509_create_transactions.rb

@@ -0,0 +1,12 @@
+class CreateTransactions < ActiveRecord::Migration[7.2]
+  def change
+    create_table :transactions do |t|
+      t.date :date, null: false
+      t.integer :amount, null: false
+      t.string :description, null: false
+      t.references :category, foreign_key: true, null: true
+
+      t.timestamps
+    end
+  end
+end

spec/factories/transaction_factory.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :transaction do
+    date { Time.zone.today }
+    amount { rand(100..1000) }
+    sequence(:description) { |i| "description-#{i}" }
+  end
+end

spec/features/transaction_spec.rb

@@ -0,0 +1,97 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe 'Transaction' do
+  describe 'creating' do
+    before do
+      visit new_transaction_path
+
+      fill_in 'Amount', with: '1000'
+      fill_in 'Date', with: '2005-02-13'
+      fill_in 'Description', with: 'Shell'
+
+      click_button 'Create Transaction'
+    end
+
+    it 'displays a success message' do
+      expect(page).to have_text 'Transaction was successfully created.'
+    end
+
+    it 'displays the new Transaction' do
+      expect(page).to have_text "Date: 2005-02-13\nAmount: 1000\nDescription: Shell"
+    end
+  end
+
+  describe 'deleting' do
+    let(:transaction) { create(:transaction) }
+
+    before do
+      visit transaction_path(transaction)
+
+      click_button 'Destroy this transaction'
+    end
+
+    it 'displays a success message' do
+      expect(page).to have_text 'Transaction was successfully destroyed.'
+    end
+
+    it 'returns to the index view' do
+      expect(page).to have_current_path(transactions_path)
+    end
+  end
+
+  describe 'indexing' do
+    let!(:transactions) { create_list(:transaction, 3) }
+
+    before do
+      visit transactions_path
+    end
+
+    it 'lists all the transaction names' do
+      expect(transactions).to(be_all do |t|
+                                !page.text(/Date: #{t.date}\nAmount: #{t.amount}Description: #{t.description}/).nil?
+                              end)
+    end
+  end
+
+  describe 'showing' do
+    let(:transaction) { create(:transaction) }
+
+    before do
+      visit transaction_path(transaction)
+    end
+
+    it 'displays the transaction amount' do
+      expect(page).to have_text "Amount: #{transaction.amount}"
+    end
+
+    it 'displays the transaction date' do
+      expect(page).to have_text "Date: #{transaction.date}"
+    end
+
+    it 'displays the transaction description' do
+      expect(page).to have_text "Description: #{transaction.description}"
+    end
+  end
+
+  describe 'updating' do
+    let(:transaction) { create(:transaction) }
+    let(:new_amount) { transaction.amount + 100 }
+
+    before do
+      visit edit_transaction_path(transaction)
+
+      fill_in 'Amount', with: new_amount
+      click_button 'Update Transaction'
+    end
+
+    it 'displays a success message' do
+      expect(page).to have_text 'Transaction was successfully updated.'
+    end
+
+    it 'displays the updated Transaction' do
+      expect(page).to have_text "Amount: #{new_amount}"
+    end
+  end
+end