A DataMapper model for representing Countries.

dm_country_model.rb

require 'dm-core'
require 'dm-validations'
require 'dm-predefined'

    class Country

      include DataMapper::Resource
      include DataMapper::Migrations
      include DataMapper::Predefined

      # The primary key of the Country
      property :id, Serial

      # The name of the Country
      property :name, String, :required => true, :unique => true

      # The ISO 3166-1993 Country Code
      property :code, String, :length => 2, :unique => true

      predefine :PA, :name => "Panama", :code => "PA"
      predefine :TV, :name => "Tuvalu", :code => "TV"
      predefine :BO, :name => "Bolivia", :code => "BO"
      predefine :NU, :name => "Niue", :code => "NU"
      predefine :AD, :name => "Andorra", :code => "AD"
      predefine :LB, :name => "Lebanon", :code => "LB"
      predefine :YU, :name => "Yugoslavia", :code => "YU"
      predefine :MW, :name => "Malawi", :code => "MW"
      predefine :PT, :name => "Portugal", :code => "PT"
      predefine :MH, :name => "Marshall Islands", :code => "MH"
      predefine :BR, :name => "Brazil", :code => "BR"
      predefine :ET, :name => "Ethiopia", :code => "ET"
      predefine :TW, :name => "Taiwan", :code => "TW"
      predefine :BD, :name => "Bangladesh", :code => "BD"
      predefine :FK, :name => "Malvinas", :code => "FK"
      predefine :DO, :name => "Dominican Republic", :code => "DO"
      predefine :HN, :name => "Honduras", :code => "HN"
      predefine :BE, :name => "Belgium", :code => "BE"
      predefine :AM, :name => "Armenia", :code => "AM"
      predefine :PW, :name => "Palau", :code => "PW"
      predefine :KH, :name => "Cambodia", :code => "KH"
      predefine :BS, :name => "Bahama", :code => "BS"
      predefine :AN, :name => "Netherlands Antilles", :code => "AN"
      predefine :CN, :name => "China", :code => "CN"
      predefine :LY, :name => "Libyan Arab Jamahiriya", :code => "LY"
      predefine :PR, :name => "Puerto Rico", :code => "PR"
      predefine :EG, :name => "Egypt", :code => "EG"
      predefine :BU, :name => "Burma", :code => "BU"
      predefine :LT, :name => "Lithuania", :code => "LT"
      predefine :BJ, :name => "Benin", :code => "BJ"
      predefine :MP, :name => "Northern Mariana Islands", :code => "MP"
      predefine :GE, :name => "Georgia", :code => "GE"
      predefine :OM, :name => "Oman", :code => "OM"
      predefine :AZ, :name => "Azerbaijan", :code => "AZ"
      predefine :CI, :name => "Ivory Coast", :code => "CI"
      predefine :VA, :name => "Vatican City State", :code => "VA"
      predefine :AS, :name => "American Samoa", :code => "AS"
      predefine :ST, :name => "Sao Tome", :code => "ST"
      predefine :DJ, :name => "Djibouti", :code => "DJ"
      predefine :KI, :name => "Kiribati", :code => "KI"
      predefine :SY, :name => "Syrian Arab Republic", :code => "SY"
      predefine :KN, :name => "St Kittsand Nevis", :code => "KN"
      predefine :GB, :name => "Great Britain", :code => "GB"
      predefine :LI, :name => "Liechtenstein", :code => "LI"
      predefine :VE, :name => "Venezuela", :code => "VE"
      predefine :NF, :name => "Norfolk Island", :code => "NF"
      predefine :LR, :name => "Liberia", :code => "LR"
      predefine :NP, :name => "Nepal", :code => "NP"
      predefine :SN, :name => "Senegal", :code => "SN"
      predefine :IE, :name => "Ireland", :code => "IE"
      predefine :IR, :name => "Islamic Republic of Iran", :code => "IR"
      predefine :SA, :name => "Saudi Arabia", :code => "SA"
      predefine :MM, :name => "Myanmar", :code => "MM"
      predefine :FO, :name => "Faroe Islands", :code => "FO"
      predefine :SL, :name => "Sierra Leone", :code => "SL"
      predefine :MD, :name => "Moldova", :code => "MD"
      predefine :HT, :name => "Haiti", :code => "HT"
      predefine :RE, :name => "Reunion", :code => "RE"
      predefine :NI, :name => "Nicaragua", :code => "NI"
      predefine :ZW, :name => "Zimbabwe", :code => "ZW"
      predefine :NL, :name => "Netherlands", :code => "NL"
      predefine :GH, :name => "Ghana", :code => "GH"
      predefine :CC, :name => "Cocos Islands", :code => "CC"
      predefine :SZ, :name => "Swaziland", :code => "SZ"
      predefine :EE, :name => "Estonia", :code => "EE"
      predefine :LS, :name => "Lesotho", :code => "LS"
      predefine :RW, :name => "Rwanda", :code => "RW"
      predefine :NA, :name => "Namibia", :code => "NA"
      predefine :IQ, :name => "Iraq", :code => "IQ"
      predefine :KM, :name => "Comoros", :code => "KM"
      predefine :CX, :name => "Christmas Island", :code => "CX"
      predefine :RO, :name => "Romania", :code => "RO"
      predefine :SJ, :name => "Svalbard Jan Mayen Islands", :code => "SJ"
      predefine :GD, :name => "Grenada", :code => "GD"
      predefine :BZ, :name => "Belize", :code => "BZ"
      predefine :GN, :name => "Guinea", :code => "GN"
      predefine :VU, :name => "Vanuatu", :code => "VU"
      predefine :ZM, :name => "Zambia", :code => "ZM"
      predefine :PN, :name => "Pitcairn", :code => "PN"
      predefine :CL, :name => "Chile", :code => "CL"
      predefine :AO, :name => "Angola", :code => "AO"
      predefine :MZ, :name => "Mozambique", :code => "MZ"
      predefine :TC, :name => "Turks Caicos Islands", :code => "TC"
      predefine :YE, :name => "Yemen", :code => "YE"
      predefine :CF, :name => "Central African Republic", :code => "CF"
      predefine :TJ, :name => "Tajikistan", :code => "TJ"
      predefine :AU, :name => "Australia", :code => "AU"
      predefine :DM, :name => "Dominica", :code => "DM"
      predefine :ES, :name => "Spain", :code => "ES"
      predefine :PH, :name => "Philippines", :code => "PH"
      predefine :CM, :name => "Cameroon", :code => "CM"
      predefine :TP, :name => "East Timor", :code => "TP"
      predefine :TF, :name => "French Southern Territories", :code => "TF"
      predefine :NE, :name => "Niger", :code => "NE"
      predefine :WS, :name => "Samoa", :code => "WS"
      predefine :MA, :name => "Morocco", :code => "MA"
      predefine :SK, :name => "Slovakia", :code => "SK"
      predefine :RU, :name => "Russian Federation", :code => "RU"
      predefine :CK, :name => "Cook Iislands", :code => "CK"
      predefine :KE, :name => "Kenya", :code => "KE"
      predefine :TO, :name => "Tonga", :code => "TO"
      predefine :BF, :name => "Burkina Faso", :code => "BF"
      predefine :MS, :name => "Monserrat", :code => "MS"
      predefine :IT, :name => "Italy", :code => "IT"
      predefine :NR, :name => "Nauru", :code => "NR"
      predefine :GF, :name => "French Guiana", :code => "GF"
      predefine :UG, :name => "Uganda", :code => "UG"
      predefine :MU, :name => "Mauritius", :code => "MU"
      predefine :GM, :name => "Gambia", :code => "GM"
      predefine :KZ, :name => "Kazakhstan", :code => "KZ"
      predefine :JP, :name => "Japan", :code => "JP"
      predefine :BB, :name => "Barbados", :code => "BB"
      predefine :GY, :name => "Guyana", :code => "GY"
      predefine :CZ, :name => "Czech Republic", :code => "CZ"
      predefine :UA, :name => "Ukraine", :code => "UA"
      predefine :BI, :name => "Burundi", :code => "BI"
      predefine :GT, :name => "Guatemala", :code => "GT"
      predefine :SE, :name => "Sweden", :code => "SE"
      predefine :LA, :name => "Lao", :code => "LA"
      predefine :BV, :name => "Bouvet Island", :code => "BV"
      predefine :IL, :name => "Israel", :code => "IL"
      predefine :AL, :name => "Albania", :code => "AL"
      predefine :WF, :name => "Wallis Futuna Islands", :code => "WF"
      predefine :AR, :name => "Argentina", :code => "AR"
      predefine :GS, :name => "South Georgia and the South Sandwich Islands", :code => "GS"
      predefine :JM, :name => "Jamaica", :code => "JM"
      predefine :LU, :name => "Luxembourg", :code => "LU"
      predefine :PF, :name => "French Polynesia", :code => "PF"
      predefine :PK, :name => "Pakistan", :code => "PK"
      predefine :IO, :name => "British Indian Ocean Territory", :code => "IO"
      predefine :CG, :name => "Congo", :code => "CG"
      predefine :BY, :name => "Belarus", :code => "BY"
      predefine :TH, :name => "Thailand", :code => "TH"
      predefine :BN, :name => "Brunei Darussalam", :code => "BN"
      predefine :IS, :name => "Iceland", :code => "IS"
      predefine :DK, :name => "Denmark", :code => "DK"
      predefine :FI, :name => "Finland", :code => "FI"
      predefine :AG, :name => "Antigua Barbuda", :code => "AG"
      predefine :GU, :name => "Guam", :code => "GU"
      predefine :KG, :name => "Kyrgyzstan", :code => "KG"
      predefine :TM, :name => "Turkmenistan", :code => "TM"
      predefine :ZR, :name => "Zaire", :code => "ZR"
      predefine :EH, :name => "Western Sahara", :code => "EH"
      predefine :PM, :name => "St Pierre Miquelon", :code => "PM"
      predefine :QA, :name => "Qatar", :code => "QA"
      predefine :GR, :name => "Greece", :code => "GR"
      predefine :MC, :name => "Monaco", :code => "MC"
      predefine :GQ, :name => "Equatorial Guinea", :code => "GQ"
      predefine :NG, :name => "Nigeria", :code => "NG"
      predefine :SH, :name => "St Helena", :code => "SH"
      predefine :PG, :name => "Papua New Guinea", :code => "PG"
      predefine :AI, :name => "Anguilla", :code => "AI"
      predefine :CH, :name => "Switzerland", :code => "CH"
      predefine :MY, :name => "Malaysia", :code => "MY"
      predefine :ZZ, :name => "Unknownorunspecifiedcountry", :code => "ZZ"
      predefine :SV, :name => "El Salvador", :code => "SV"
      predefine :BH, :name => "Bahrain", :code => "BH"
      predefine :TT, :name => "Trinidad Tobago", :code => "TT"
      predefine :TK, :name => "Tokelau", :code => "TK"
      predefine :KR, :name => "Korea", :code => "KR"
      predefine :FX, :name => "France Metropolitan", :code => "FX"
      predefine :BG, :name => "Bulgaria", :code => "BG"
      predefine :UY, :name => "Uruguay", :code => "UY"
      predefine :CS, :name => "Czechoslovakia", :code => "CS"
      predefine :MN, :name => "Mongolia", :code => "MN"
      predefine :MX, :name => "Mexico", :code => "MX"
      predefine :MR, :name => "Mauritania", :code => "MR"
      predefine :PE, :name => "Peru", :code => "PE"
      predefine :CV, :name => "Cape Verde", :code => "CV"
      predefine :VN, :name => "Viet Nam", :code => "VN"
      predefine :BM, :name => "Bermuda", :code => "BM"
      predefine :KW, :name => "Kuwait", :code => "KW"
      predefine :FM, :name => "Micronesia", :code => "FM"
      predefine :MQ, :name => "Martinique", :code => "MQ"
      predefine :AQ, :name => "Antarctica", :code => "AQ"
      predefine :LK, :name => "Sri Lanka", :code => "LK"
      predefine :AT, :name => "Austria", :code => "AT"
      predefine :ML, :name => "Mali", :code => "ML"
      predefine :TN, :name => "Tunisia", :code => "TN"
      predefine :JO, :name => "Jordan", :code => "JO"
      predefine :PY, :name => "Paraguay", :code => "PY"
      predefine :TD, :name => "Chad", :code => "TD"
      predefine :IN, :name => "India", :code => "IN"
      predefine :VG, :name => "British Virgin Islands", :code => "VG"
      predefine :MV, :name => "Maldives", :code => "MV"
      predefine :MT, :name => "Malta", :code => "MT"
      predefine :NC, :name => "New Caledonia", :code => "NC"
      predefine :YT, :name => "Mayotte", :code => "YT"
      predefine :UM, :name => "United States Minor Outlying Islands", :code => "UM"
      predefine :BW, :name => "Botswana", :code => "BW"
      predefine :NO, :name => "Norway", :code => "NO"
      predefine :ER, :name => "Eritrea", :code => "ER"
      predefine :ID, :name => "Indonesia", :code => "ID"
      predefine :US, :name => "United States of America", :code => "US"
      predefine :HK, :name => "Hong Kong", :code => "HK"
      predefine :ZA, :name => "South Africa", :code => "ZA"
      predefine :GW, :name => "Guinea Bissau", :code => "GW"
      predefine :FJ, :name => "Fiji", :code => "FJ"
      predefine :HR, :name => "Croatia", :code => "HR"
      predefine :CA, :name => "Canada", :code => "CA"
      predefine :SR, :name => "Suriname", :code => "SR"
      predefine :GP, :name => "Guadeloupe", :code => "GP"
      predefine :UZ, :name => "Uzbekistan", :code => "UZ"
      predefine :DE, :name => "Germany", :code => "DE"
      predefine :MG, :name => "Madagascar", :code => "MG"
      predefine :HU, :name => "Hungary", :code => "HU"
      predefine :SI, :name => "Slovenia", :code => "SI"
      predefine :TG, :name => "Togo", :code => "TG"
      predefine :CY, :name => "Cyprus", :code => "CY"
      predefine :CR, :name => "Costa Rica", :code => "CR"
      predefine :VI, :name => "United States Virgin Islands", :code => "VI"
      predefine :GL, :name => "Greenland", :code => "GL"
      predefine :CO, :name => "Colombia", :code => "CO"
      predefine :SG, :name => "Singapore", :code => "SG"
      predefine :SO, :name => "Somalia", :code => "SO"
      predefine :LC, :name => "Saint Lucia", :code => "LC"
      predefine :CU, :name => "Cuba", :code => "CU"
      predefine :DZ, :name => "Algeria", :code => "DZ"
      predefine :SM, :name => "San Marino", :code => "SM"
      predefine :TZ, :name => "Tanzania", :code => "TZ"
      predefine :GA, :name => "Gabon", :code => "GA"
      predefine :GI, :name => "Gibraltar", :code => "GI"
      predefine :EC, :name => "Ecuador", :code => "EC"
      predefine :BA, :name => "Bosniaand Herzegovina", :code => "BA"
      predefine :AF, :name => "Afghanistan", :code => "AF"
      predefine :HM, :name => "Heard Mc Donald Islands", :code => "HM"
      predefine :LV, :name => "Latvia", :code => "LV"
      predefine :NZ, :name => "New Zealand", :code => "NZ"
      predefine :FR, :name => "France", :code => "FR"
      predefine :AW, :name => "Aruba", :code => "AW"
      predefine :KY, :name => "Cayman Islands", :code => "KY"
      predefine :AE, :name => "United Arab Emirates", :code => "AE"
      predefine :MO, :name => "Macau", :code => "MO"
      predefine :TR, :name => "Turkey", :code => "TR"
      predefine :PL, :name => "Poland", :code => "PL"
      predefine :SB, :name => "Solomon Islands", :code => "SB"
      predefine :SD, :name => "Sudan", :code => "SD"
      predefine :NT, :name => "Neutral Zone", :code => "NT"
      predefine :VC, :name => "St Vincent Grenadines", :code => "VC"
      predefine :BT, :name => "Bhutan", :code => "BT"
      predefine :SC, :name => "Seychelles", :code => "SC"

    end