Implemented a 3 endpoint json api storing and querying data from neo4j

Dockerfile

@@ -1,6 +1,6 @@
 FROM ruby:3.2.2
-RUN mkdir -p /var/app
-COPY . /app
 WORKDIR /app
+COPY Gemfile Gemfile
 RUN bundle install
-CMD rails server -e development -b 0.0.0.0 --log-to-stdout
+COPY . /app
+CMD rails server -b 0.0.0.0 --log-to-stdout

Gemfile

@@ -13,16 +13,7 @@ gem "sqlite3", "~> 1.4"
 gem "puma", "~> 5.0"
 
 # Build JSON APIs with ease [https://github.com/rails/jbuilder]
-# gem "jbuilder"
-
-# Use Redis adapter to run Action Cable in production
-# gem "redis", "~> 4.0"
-
-# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
-# gem "kredis"
-
-# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
-# gem "bcrypt", "~> 3.1.7"
+gem "jbuilder"
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
@@ -30,11 +21,10 @@ gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
 # Reduces boot times through caching; required in config/boot.rb
 gem "bootsnap", require: false
 
-# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
-# gem "image_processing", "~> 1.2"
-
-# Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
-# gem "rack-cors"
+# From Neo4J.rb documentation
+gem 'activegraph', '~> 11.3'
+gem 'neo4j-ruby-driver', '~> 4.4.3'
+gem 'neo4j-rake_tasks'
 
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem

Gemfile.lock

@@ -46,6 +46,13 @@ GEM
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activegraph (11.3.1)
+      activemodel (>= 4.0)
+      activesupport (>= 4.0)
+      i18n (!= 1.8.8)
+      neo4j-ruby-driver (>= 4.4.1)
+      orm_adapter (~> 0.5.0)
+      sorted_set
     activejob (7.0.4.3)
       activesupport (= 7.0.4.3)
       globalid (>= 0.3.6)
@@ -66,23 +73,37 @@ GEM
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
+    async (2.5.1)
+      console (~> 1.10)
+      io-event (~> 1.1)
+      timers (~> 4.1)
+    async-io (1.34.3)
+      async
     bootsnap (1.16.0)
       msgpack (~> 1.2)
     builder (3.2.4)
     concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
+    console (1.16.2)
+      fiber-local
     crass (1.0.6)
     date (3.3.3)
     debug (1.8.0)
       irb (>= 1.5.0)
       reline (>= 0.3.1)
     erubi (1.12.0)
+    fiber-local (1.0.0)
     globalid (1.1.0)
       activesupport (>= 5.0)
     i18n (1.13.0)
       concurrent-ruby (~> 1.0)
     io-console (0.6.0)
+    io-event (1.2.2)
     irb (1.6.4)
       reline (>= 0.3.0)
+    jbuilder (2.11.5)
+      actionview (>= 5.0.0)
+      activesupport (>= 5.0.0)
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -96,6 +117,16 @@ GEM
     mini_mime (1.1.2)
     minitest (5.18.0)
     msgpack (1.7.1)
+    neo4j-rake_tasks (0.7.19)
+      os
+      rake
+      ruby-progressbar
+      rubyzip (>= 1.1.7)
+    neo4j-ruby-driver (4.4.4)
+      activesupport
+      async-io
+      connection_pool
+      zeitwerk (>= 2.1.10)
     net-imap (0.3.4)
       date
       net-protocol
@@ -106,8 +137,14 @@ GEM
     net-smtp (0.3.3)
       net-protocol
     nio4r (2.5.9)
+    nokogiri (1.15.1-aarch64-linux)
+      racc (~> 1.4)
     nokogiri (1.15.1-arm64-darwin)
       racc (~> 1.4)
+    nokogiri (1.15.1-x86_64-linux)
+      racc (~> 1.4)
+    orm_adapter (0.5.0)
+    os (1.1.4)
     puma (5.6.5)
       nio4r (~> 2.0)
     racc (1.6.2)
@@ -141,11 +178,21 @@ GEM
       thor (~> 1.0)
       zeitwerk (~> 2.5)
     rake (13.0.6)
+    rbtree (0.4.6)
     reline (0.3.4)
       io-console (~> 0.5)
+    ruby-progressbar (1.13.0)
+    rubyzip (2.3.2)
+    set (1.0.3)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
+    sqlite3 (1.6.3-aarch64-linux)
     sqlite3 (1.6.3-arm64-darwin)
+    sqlite3 (1.6.3-x86_64-linux)
     thor (1.2.2)
     timeout (0.3.2)
+    timers (4.3.5)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     websocket-driver (0.7.5)
@@ -154,11 +201,17 @@ GEM
     zeitwerk (2.6.8)
 
 PLATFORMS
+  aarch64-linux
   arm64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
+  activegraph (~> 11.3)
   bootsnap
   debug
+  jbuilder
+  neo4j-rake_tasks
+  neo4j-ruby-driver (~> 4.4.3)
   puma (~> 5.0)
   rails (~> 7.0.4, >= 7.0.4.3)
   sqlite3 (~> 1.4)

app/controllers/metrics_controller.rb

@@ -1,26 +1,38 @@
 class MetricsController < ActionController::API
 
-  # GET /metric
-  def index 
-    render json: {}
-  end
-
   # POST /metric/:key
   def create
     key = params[:key]
+    value = JSON.parse(request.body.read)["value"]
+
+    metric = Metric.find_or_create_by(key: key)
+    metric.value = value
+
+    if metric.save()
       render json: {}
+    else
+      render json: { error: "Unable to save" }, status: :unprocessable_entity
+    end
   end
 
-  # GET /metric/:key
-  def show
-    # Return an empty JSON response
-    render json: {}
+  # GET /metric/
+  def index
+    returnable = []
+    Metric.all.each do |metric|
+      returnable << MetricOutput.new(metric.key, metric.value)
+    end
+    render json: returnable.to_json
   end
 
   # DELETE /metric/:key
   def delete
     key = params[:key]
+    metric = Metric.find_by(key: key)
+    if metric.destroy
       render json: {}
+    else
+      render json: { error: "Unable to delete" }, status: :unprocessable_entity
+    end
   end
 
 end

app/helpers/MetricOutput.rb

@@ -0,0 +1,10 @@
+class MetricOutput
+  attr_reader :key, :value
+
+  def initialize(key, value)
+    @key = key
+    @value = value
+  end
+end
+
+

app/models/metric.rb

@@ -0,0 +1,7 @@
+class Metric 
+  include ActiveGraph::Node
+  property :key, type: String
+  property :value, type: Integer, default: 0
+  validates :key, :presence => true
+
+end

config/application.rb

@@ -1,6 +1,7 @@
 require_relative "boot"
 
 require "rails/all"
+require 'active_graph/railtie'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
@@ -10,7 +11,7 @@ module GrilloTest
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 7.0
-
+    config.generators { |g| g.orm :active_graph }
     # Configuration for the application, engines, and railties goes here.
     #
     # These settings can be overridden in specific environments using the files

db/neo4j/migrate/20230524023145_create_metric.rb

@@ -0,0 +1,11 @@
+class CreateMetric < ActiveGraph::Migrations::Base
+  disable_transactions!
+
+  def up
+    add_constraint :Metric, :uuid
+  end
+
+  def down
+    drop_constraint :Metric, :uuid
+  end
+end

db/neo4j/schema.yml

@@ -0,0 +1,21 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Node to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.yml definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using neo4j: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.
+
+---
+:constraints:
+- 'CREATE CONSTRAINT `constraint_3d18f4d7` FOR (n:`Metric`) REQUIRE (n.`uuid`) IS
+  UNIQUE OPTIONS {indexConfig: {}, indexProvider: ''range-1.0''}'
+- 'CREATE CONSTRAINT `constraint_dbcee0a4` FOR (n:`ActiveGraph::Migrations::SchemaMigration`)
+  REQUIRE (n.`migration_id`) IS UNIQUE OPTIONS {indexConfig: {}, indexProvider: ''range-1.0''}'
+:indexes: []
+:versions:
+- '20230524023145'

docker-compose.yaml

@@ -9,5 +9,23 @@ services:
       - "3000:3000"
     volumes:
       - "./:/app"
+    depends_on:
+      - neo4j
     environment:
+      - NEO4J_URL=bolt://neo4j:7687
       - ENVIRONMENT=development
+    platform: linux/amd64
+
+  neo4j:
+    image: neo4j
+    ports:
+    - "7474:7474"
+    - "7687:7687"
+    volumes:
+      - ./neo4j:/data
+      - ./neo4j/logs:/logs
+    environment:
+      - NEO4J_AUTH=none
+        #- dbms.connector.bolt.listen_address=:7687
+        #- dbms.connector.bolt.advertised_address=:7687
+

justfile

@@ -0,0 +1,18 @@
+build:
+    docker compose build
+
+run:
+    docker compose up
+
+shell:
+    docker compose run app bash
+
+migrate:
+    docker compose run app rails neo4j:migrate
+
+clean-db:
+    rm -rf neo4j
+
+clean:
+    rm -rf tmp/pids/server.pid
+

test/fixtures/metrics.yml

@@ -0,0 +1,11 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined. If you add columns to the
+# model remove the "{}" from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+# column: value

test/models/metric_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class MetricTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end