我有一个外部country.json文件（仅在根文件夹中，不在我的ajax函数所在的js文件夹中）。当我尝试使用getJSON方法加载country.json的内容并将其附加到选择选项时客户端html的代码。我遇到了错误，
控制台中的错误：
{ CastError: Cast to ObjectId failed for value "countries.json" at path "_id" fo
r model "localuser"{ CastError: Cast to ObjectId failed for value "countries.json" at path "_id" fo
r model "localuser"
countries.json
[
{"name": "Afghanistan", "code": "AF"},
{"name": "Albania", "code": "AL"},
{"name": "Algeria", "code": "DZ"},
{"name": "Angola", "code": "AO"},
{"name": "Anguilla", "code": "AI"},
{"name": "Antarctica", "code": "AQ"},
{"name": "Argentina", "code": "AR"},
{"name": "Armenia", "code": "AM"},
{"name": "Aruba", "code": "AW"},
{"name": "Australia", "code": "AU"},
{"name": "Austria", "code": "AT"},
{"name": "Azerbaijan", "code": "AZ"},
{"name": "Bahamas", "code": "BS"},
{"name": "Bahrain", "code": "BH"},
{"name": "Bangladesh", "code": "BD"},
{"name": "Barbados", "code": "BB"},
{"name": "Belarus", "code": "BY"},
{"name": "Belgium", "code": "BE"},
{"name": "Belize", "code": "BZ"},
{"name": "Benin", "code": "BJ"},
{"name": "Bermuda", "code": "BM"},
{"name": "Bhutan", "code": "BT"},
{"name": "Bolivia", "code": "BO"},
{"name": "Bosnia and Herzegovina", "code": "BA"},
{"name": "Botswana", "code": "BW"},
{"name": "Bouvet Island", "code": "BV"},
{"name": "Brazil", "code": "BR"},
{"name": "British Indian Ocean Territory", "code": "IO"},
{"name": "Brunei Darussalam", "code": "BN"},
{"name": "Bulgaria", "code": "BG"},
{"name": "Burkina Faso", "code": "BF"},
{"name": "Burundi", "code": "BI"},
{"name": "Cambodia", "code": "KH"},
{"name": "Cameroon", "code": "CM"},
{"name": "Canada", "code": "CA"},
{"name": "Cape Verde", "code": "CV"},
{"name": "Cayman Islands", "code": "KY"},
{"name": "Central African Republic", "code": "CF"},
{"name": "Chad", "code": "TD"},
{"name": "Chile", "code": "CL"},
{"name": "China", "code": "CN"},
{"name": "Christmas Island", "code": "CX"},
{"name": "Cocos (Keeling) Islands", "code": "CC"},
{"name": "Colombia", "code": "CO"},
{"name": "Comoros", "code": "KM"},
{"name": "Congo", "code": "CG"},
{"name": "Congo, The Democratic Republic of the", "code": "CD"},
{"name": "Cook Islands", "code": "CK"},
{"name": "Costa Rica", "code": "CR"},
{"name": "Croatia", "code": "HR"},
{"name": "Cuba", "code": "CU"},
{"name": "Cyprus", "code": "CY"},
{"name": "Czech Republic", "code": "CZ"},
{"name": "Denmark", "code": "DK"},
{"name": "Djibouti", "code": "DJ"},
{"name": "Dominica", "code": "DM"},
{"name": "Dominican Republic", "code": "DO"},
{"name": "Ecuador", "code": "EC"},
{"name": "Egypt", "code": "EG"},
{"name": "El Salvador", "code": "SV"},
{"name": "Equatorial Guinea", "code": "GQ"},
{"name": "Eritrea", "code": "ER"},
{"name": "Estonia", "code": "EE"},
{"name": "Ethiopia", "code": "ET"},
{"name": "Falkland Islands (Malvinas)", "code": "FK"},
{"name": "Faroe Islands", "code": "FO"},
{"name": "Fiji", "code": "FJ"},
{"name": "Finland", "code": "FI"},
{"name": "France", "code": "FR"},
{"name": "French Guiana", "code": "GF"},
{"name": "French Polynesia", "code": "PF"},
{"name": "French Southern Territories", "code": "TF"},
{"name": "Gabon", "code": "GA"},
{"name": "Gambia", "code": "GM"},
{"name": "Georgia", "code": "GE"},
{"name": "Germany", "code": "DE"},
{"name": "Ghana", "code": "GH"},
{"name": "Gibraltar", "code": "GI"},
{"name": "Greece", "code": "GR"},
{"name": "Greenland", "code": "GL"},
{"name": "Grenada", "code": "GD"},
{"name": "Guadeloupe", "code": "GP"},
{"name": "Guam", "code": "GU"},
{"name": "Guatemala", "code": "GT"},
{"name": "Guernsey", "code": "GG"},
{"name": "Guinea", "code": "GN"},
{"name": "Guinea-Bissau", "code": "GW"},
{"name": "Guyana", "code": "GY"},
{"name": "Haiti", "code": "HT"},
{"name": "Heard Island and Mcdonald Islands", "code": "HM"},
{"name": "Holy See (Vatican City State)", "code": "VA"},
{"name": "Honduras", "code": "HN"},
{"name": "Hong Kong", "code": "HK"},
{"name": "Hungary", "code": "HU"},
{"name": "Iceland", "code": "IS"},
{"name": "India", "code": "IN"},
{"name": "Indonesia", "code": "ID"},
{"name": "Iran, Islamic Republic Of", "code": "IR"},
{"name": "Iraq", "code": "IQ"},
{"name": "Ireland", "code": "IE"},
{"name": "Isle of Man", "code": "IM"},
{"name": "Israel", "code": "IL"},
{"name": "Italy", "code": "IT"},
{"name": "Jamaica", "code": "JM"},
{"name": "Japan", "code": "JP"},
{"name": "Jersey", "code": "JE"},
{"name": "Jordan", "code": "JO"},
{"name": "Kazakhstan", "code": "KZ"},
{"name": "Kenya", "code": "KE"},
{"name": "Kiribati", "code": "KI"},
{"name": "Korea, Republic of", "code": "KR"},
{"name": "Kuwait", "code": "KW"},
{"name": "Kyrgyzstan", "code": "KG"},
{"name": "Latvia", "code": "LV"},
{"name": "Lebanon", "code": "LB"},
{"name": "Lesotho", "code": "LS"},
{"name": "Liberia", "code": "LR"},
{"name": "Libyan Arab Jamahiriya", "code": "LY"},
{"name": "Liechtenstein", "code": "LI"},
{"name": "Lithuania", "code": "LT"},
{"name": "Luxembourg", "code": "LU"},
{"name": "Macao", "code": "MO"},
{"name": "Macedonia, The Former Yugoslav Republic of", "code": "MK"},
{"name": "Madagascar", "code": "MG"},
{"name": "Malawi", "code": "MW"},
{"name": "Malaysia", "code": "MY"},
{"name": "Maldives", "code": "MV"},
{"name": "Mali", "code": "ML"},
{"name": "Malta", "code": "MT"},
{"name": "Marshall Islands", "code": "MH"},
{"name": "Martinique", "code": "MQ"},
{"name": "Mauritania", "code": "MR"},
{"name": "Mauritius", "code": "MU"},
{"name": "Mayotte", "code": "YT"},
{"name": "Mexico", "code": "MX"},
{"name": "Micronesia, Federated States of", "code": "FM"},
{"name": "Moldova, Republic of", "code": "MD"},
{"name": "Monaco", "code": "MC"},
{"name": "Mongolia", "code": "MN"},
{"name": "Montserrat", "code": "MS"},
{"name": "Morocco", "code": "MA"},
{"name": "Mozambique", "code": "MZ"},
{"name": "Myanmar", "code": "MM"},
{"name": "Namibia", "code": "NA"},
{"name": "Nauru", "code": "NR"},
{"name": "Nepal", "code": "NP"},
{"name": "Netherlands", "code": "NL"},
{"name": "Netherlands Antilles", "code": "AN"},
{"name": "New Caledonia", "code": "NC"},
{"name": "New Zealand", "code": "NZ"},
{"name": "Nicaragua", "code": "NI"},
{"name": "Niger", "code": "NE"},
{"name": "Nigeria", "code": "NG"},
{"name": "Niue", "code": "NU"},
{"name": "Norfolk Island", "code": "NF"},
{"name": "Northern Mariana Islands", "code": "MP"},
{"name": "Norway", "code": "NO"},
{"name": "Oman", "code": "OM"},
{"name": "Pakistan", "code": "PK"},
{"name": "Palau", "code": "PW"},
{"name": "Palestinian Territory, Occupied", "code": "PS"},
{"name": "Panama", "code": "PA"},
{"name": "Papua New Guinea", "code": "PG"},
{"name": "Paraguay", "code": "PY"},
{"name": "Peru", "code": "PE"},
{"name": "Philippines", "code": "PH"},
{"name": "Pitcairn", "code": "PN"},
{"name": "Poland", "code": "PL"},
{"name": "Portugal", "code": "PT"},
{"name": "Puerto Rico", "code": "PR"},
{"name": "Qatar", "code": "QA"},
{"name": "Reunion", "code": "RE"},
{"name": "Romania", "code": "RO"},
{"name": "Russian Federation", "code": "RU"},
{"name": "RWANDA", "code": "RW"},
{"name": "Saint Helena", "code": "SH"},
{"name": "Saint Kitts and Nevis", "code": "KN"},
{"name": "Saint Lucia", "code": "LC"},
{"name": "Saint Pierre and Miquelon", "code": "PM"},
{"name": "Saint Vincent and the Grenadines", "code": "VC"},
{"name": "Samoa", "code": "WS"},
{"name": "San Marino", "code": "SM"},
{"name": "Sao Tome and Principe", "code": "ST"},
{"name": "Saudi Arabia", "code": "SA"},
{"name": "Senegal", "code": "SN"},
{"name": "Serbia and Montenegro", "code": "CS"},
{"name": "Seychelles", "code": "SC"},
{"name": "Sierra Leone", "code": "SL"},
{"name": "Singapore", "code": "SG"},
{"name": "Slovakia", "code": "SK"},
{"name": "Slovenia", "code": "SI"},
{"name": "Solomon Islands", "code": "SB"},
{"name": "Somalia", "code": "SO"},
{"name": "South Africa", "code": "ZA"},
{"name": "South Georgia and the South Sandwich Islands", "code": "GS"},
{"name": "Spain", "code": "ES"},
{"name": "Sri Lanka", "code": "LK"},
{"name": "Sudan", "code": "SD"},
{"name": "Suriname", "code": "SR"},
{"name": "Svalbard and Jan Mayen", "code": "SJ"},
{"name": "Swaziland", "code": "SZ"},
{"name": "Sweden", "code": "SE"},
{"name": "Switzerland", "code": "CH"},
{"name": "Syrian Arab Republic", "code": "SY"},
{"name": "Taiwan, Province of China", "code": "TW"},
{"name": "Tajikistan", "code": "TJ"},
{"name": "Tanzania, United Republic of", "code": "TZ"},
{"name": "Thailand", "code": "TH"},
{"name": "Timor-Leste", "code": "TL"},
{"name": "Togo", "code": "TG"},
{"name": "Tokelau", "code": "TK"},
{"name": "Tonga", "code": "TO"},
{"name": "Trinidad and Tobago", "code": "TT"},
{"name": "Tunisia", "code": "TN"},
{"name": "Turkey", "code": "TR"},
{"name": "Turkmenistan", "code": "TM"},
{"name": "Turks and Caicos Islands", "code": "TC"},
{"name": "Tuvalu", "code": "TV"},
{"name": "Uganda", "code": "UG"},
{"name": "Ukraine", "code": "UA"},
{"name": "United Arab Emirates", "code": "AE"},
{"name": "United Kingdom", "code": "GB"},
{"name": "United States", "code": "US"},
{"name": "United States Minor Outlying Islands", "code": "UM"},
{"name": "Uruguay", "code": "UY"},
{"name": "Uzbekistan", "code": "UZ"},
{"name": "Vanuatu", "code": "VU"},
{"name": "Venezuela", "code": "VE"},
{"name": "Viet Nam", "code": "VN"},
{"name": "Virgin Islands, British", "code": "VG"},
{"name": "Virgin Islands, U.S.", "code": "VI"},
{"name": "Wallis and Futuna", "code": "WF"},
{"name": "Western Sahara", "code": "EH"},
{"name": "Yemen", "code": "YE"},
{"name": "Zambia", "code": "ZM"},
{"name": "Zimbabwe", "code": "ZW"}
]
ajax呼叫看起来像这样
$('#countries').click(function(){
$.getJSON("countries.json", function(result){
// console.log(result);
$.each(result, function(country){
$('#countries').append('<option value'+country.name+'></option>\
')
$("select option[value='India']").attr("selected","selected");
});
});
我的尝试，json部分或文件的位置或getJSON方法有什么问题。请告诉我如何解决？
注意：我正在快速应用程序（节点服务器）中运行它。