The Participant Model

api_participant.rb

class ApiParticipant
  def self.fetch_participants(&block)
    BubbleWrap::HTTP.get("http://jugendgruppe-backend.192.168.2.105.xip.io/participants.json") do |response|
      if response.ok?
        json = BubbleWrap::JSON.parse(response.body)

        participants = json.map {|pj| Participant.from_json(pj["participant"])}
        p "You are here: #{self.name}: #{participants}"

        block.call(true, participants)
      else
        block.call(false, nil)
      end
    end
  end
end

participant.rb

class Participant
  attr_accessor :first_name, 
                :last_name, 
                :date_of_birth, 
                :group,
                :swimmer

  def initialize(attrs)
    attrs.each_pair do |key, value|
      self.send("#{key}=", value)
    end
  end

  def self.from_json(json)
    new(:first_name         => json["first_name"])
  end

  # def self.last_name_from_json(json)
  #   new(:last_name          => json["last_name"])
  # end

  # def self.date_of_birth_from_json(json)
  #   new(:date_of_birth      => json["date_of_birth"])
  # end

  # def self.group_from_json(json)
  #   new(:group              => json["group"])
  # end

  # def self.swimmer_from_json(json)
  #   new(:swimmer            => json["swimmer"])
  # end
end

participants.json

[{"participant":{"allergy":"Lactose Intolerant","created_at":"2012-11-20T05:40:07Z","date_of_birth":"2007-10-06","emergency_number":"123456","first_name":"Sebastian","group":"St. Peter","health_insurance_card":true,"id":1,"last_name":"B","swimmer":true,"updated_at":"2012-11-20T05:40:07Z","vaccination_certificate":true}},{"participant":{"allergy":"Fructose Intolerant","created_at":"2012-11-20T05:41:17Z","date_of_birth":"2008-03-03","emergency_number":"123456","first_name":"Johannes ","group":"St. Johannes","health_insurance_card":true,"id":2,"last_name":"B","swimmer":true,"updated_at":"2012-11-20T05:41:17Z","vaccination_certificate":true}}]

participants_detail_view_controller.rb

class Participants_detailTableViewController < UITableViewController
  def viewDidLoad
    super
  end

  def viewDidUnload
    super
  end

  # helper methods
  def bind_with_participants(participant)
    @participant = participant
    navigationItem.title = participant.first_name
    view.reloadData
  end

  def shouldAutorotateToInterfaceOrientation(interfaceOrientation)
    interfaceOrientation == UIInterfaceOrientationPortrait
  end

## Table view data source

  def numberOfSectionsInTableView(tableView)
    1
  end

  def tableView(tableView, numberOfRowsInSection:section)
    5
  end

  def tableView(tableView, cellForRowAtIndexPath:indexPath)
    cellIdentifier = self.class.name
    cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) || begin
      cell = UITableViewCell.alloc.initWithStyle(UITableViewCellStyleDefault, reuseIdentifier:cellIdentifier)
      cell
    end

    # first_name = @participant['first_name'][indexPath.row]
    # p "#{self.name} #{first_name}"
    # cell.textLabel.text = first_name
    # cell
  end

## Table view delegate

  def tableView(tableView, didSelectRowAtIndexPath:indexPath)
  end
end

participants_table_view_controller.rb

class ParticipantsTableViewController < UITableViewController
  def viewDidLoad
    super

    @participants ||= []

    ApiParticipant.fetch_participants do |success, participants|
      if success
        @participants = participants
        p "Received #{@participants.length} participants"
        self.tableView.reloadData
      else
        App.alert("Oops!")
      end
    end

    self.navigationItem.title = "Teilnehmer"
  end

  def viewDidUnload
    super
  end

  def shouldAutorotateToInterfaceOrientation(interfaceOrientation)
    interfaceOrientation == UIInterfaceOrientationPortrait
  end

## Table view data source

  def numberOfSectionsInTableView(tableView)
    # Return the number of sections.
    1
  end

  def tableView(tableView, numberOfRowsInSection:section)
    # Return the number of rows in the section.
    # @participants ? @participants.length : 0
    @participants.length
  end

  def tableView(tableView, cellForRowAtIndexPath:indexPath)
    cellIdentifier = self.class.name
    cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) || begin
      cell = UITableViewCell.alloc.initWithStyle(UITableViewCellStyleDefault, reuseIdentifier:cellIdentifier)
      cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton
      cell
    end
    
    participant = @participants[indexPath.row]
    cell.textLabel.text = participant.first_name
    cell
  end

## Table view delegate

  def tableView(tableView, didSelectRowAtIndexPath:indexPath)
    participants_detail_table_view_controller = Participants_detailTableViewController.alloc.init
    self.navigationController.pushViewController(participants_detail_table_view_controller, animated:true)

    participant = @participants[indexPath.row]
    participants_detail_table_view_controller.bind_with_participants(participant)
  end
end