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POMany to many persistence ruby mongoid
 

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    <p>Hey this is my first post so tell me if I am not giving you enough information</p> <p>So, I am trying out ruby1.9.2 and using mongoid2.2.0 with mongodb1.8.2 and I am having trouble persisting database documents in the code with a many to many relationship.</p> <pre><code>require 'mongoid' require 'mongo' Mongoid.load!("../Configurations/mongoid.yml") Mongoid.configure do |config| config.master = Mongo::Connection.new.db("godfather") end connection = Mongo::Connection.new connection.drop_database("godfather") database = connection.db("godfather") class Project include Mongoid::Document field :name, type: String key :name field :numPeople, type: Integer has_and_belongs_to_many :people end class Person include Mongoid::Document field :name, type: String key :name field :numProjects, type: Integer, default: 0 has_and_belongs_to_many :projects def add_project(project_name) project = Project.create(name: project_name) self.numProjects = self.numProjects + 1 self.projects &lt;&lt; project self.save end def has_project?(project_name) self.projects.each do |project| if project.name.upcase == project_name.upcase return true end end return false end end database = Project.create(name: "Database") alice = Person.create(name: "Alice") alice.add_project("Database") puts "has project? #{alice.has_project?("Database")}"#outputs true puts "Alice has #{alice.numProjects} projects"#outputs 1 puts "Alice really has #{alice.projects.size} projects"#outputs 1 editor = Project.create(name: "Editor") john = Person.create(name: "John") john.has_project?("Editor") john.add_project("Editor") puts "has project? #{john.has_project?("Editor")}"#outputs false puts "John has #{john.numProjects} projects"#outputs 1 puts "John really has #{john.projects.size} projects"#outputs 0 operatingSystem = Project.create(name: "OperatingSystem") drinking = Project.create(name: "Drinking") henry = Person.create(name: "Henry") henry.add_project("OperatingSystem") henry.has_project?("OperatingSystem") henry.add_project("drinking") henry.add_project("Editor") puts "Henry has #{henry.numProjects} projects"#outputs 3 puts "Henry really has #{henry.projects.size} projects"# outputs 3 </code></pre> <p>So the problem is John outputs that he has 0 projects when I have added one. </p> <p>The weird thing is when I use the mongo terminal to inspect the database it shows john having the one project "Editor" which the code did not find in john.projects.size. </p> <p>Ideally the order in which i call add_project and has_project? should not affect the code and matter.</p> <ul> <li>thanks</li> </ul>
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