Neo4j integration in rails, A Sample App

In Rails 4

In a new project

rails new YourProject --skip-active-record

In an existing project

In your Gemfile, remove the database driver gem, e.g. gem 'sqlite3' or gem 'pg'.

In config/application.rb, replace require 'rails/all' with

require "action_controller/railtie"

require "action_mailer/railtie"

require "sprockets/railtie"

require "rails/test_unit/railtie"

In config/environments/development.rb, remove or comment out

config.active_record.migration_error = :page_load

you have to remove active_record helpers from the spec_helper

In application.rb

config.app_middleware.delete "ActiveRecord::ConnectionAdapters::ConnectionManagement"

gem 'neo4j', github: 'neo4jrb/neo4j' # in Gemfile

neo4j.yml

default: &default

  type: server_db

  url: http://neo4j:password@localhost:7474

development:

  <<: *default

test:

  <<: *default

production:

  <<: *default

For authentication

Used Devise

For authorization

Used Pundit

Problem with namespaces in Pundit

Issue Namespace Issue

My Solution

policy/dashboard/home_policy.rb

module Dashboard
  class HomePolicy < DashboardPolicy
    def initialize(user, record)
      @user = user
      @record = record
    end

    def show?
      @user.present?
    end
  end
end

policy/home_policy.rb

class HomePolicy < ApplicationPolicy

  def initialize(user, record)
    @user = user
    @record = record
  end

  def show?
    true
  end
end

dashboard/home_controller.rb

def show
  # send name of controller, which is the policy's qualifying name.
  # and that's it voila.
  authorize :"#{params[:controller]}", :show?
end