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こんにちは、Googleの場所からJSONレスポンスを返すことができ、そこから写真参照要素を抽出する必要があります。google place繰り返しJSONレスポンス
私は場所の結果を反復しようとしましたが、各場所の結果はphoto_referenceですが、エラーメッセージが表示されます。
TypeError：プロパティ '0'または未定義は読み取れません。私が試してみました何
：ここ
response.on('end', function() {
var places = JSON.parse(body);
var locations = places.results;
locations.forEach(function(loc) {
var photoRef = loc.photos[0].photo_reference;
console.log('Photo ref ==' + photoRef);
});
});は、JSON応答のサンプルです。
{
"html_attributions" : [],
"results" : [
{
"geometry" : {
"location" : {
"lat" : 46.7725141,
"lng" : 23.62686099999999
},
"viewport" : {
"northeast" : {
"lat" : 46.77284264999999,
"lng" : 23.62798785
},
"southwest" : {
"lat" : 46.77152845000001,
"lng" : 23.62348045
}
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/lodging-71.png",
"id" : "18ce6ff7131f1ffd9ce9b2558ba407eed7409aee",
"name" : "Hotel Univers T",
"photos" : [
{
"height" : 1066,
"html_attributions" : [
"\u003ca href=\"https://maps.google.com/maps/contrib/116854836566418330262/photos\"\u003eHotel Univers T\u003c/a\u003e"
],
"photo_reference" : "CoQBdwAAAE6Zi31LvtXmRM0orTBKDbJ3pgENKS82rVyP-462YhvrZAhhiDp2xowEiWsDNPU8tTmkXkhhB2ADKHi5GcptXSDx16GtG6RL9gpmogJw9BIR1JDiWSgMOzIE9xguxAQJ_s6Q9VHv77tQAmukc7JTJmBF_bFKQF3pVcmH6ffuUuiZEhDaF5BmQFqZRyeDOAA0KBkdGhSYpD-28mHr9XOKRb8dTheHJLA5bg",
"width" : 1069
}
],
"place_id" : "ChIJPzw_f2oMSUcRNl_Mz_sQS2c",
"rating" : 4,
"reference" : "CmRRAAAAGFISd-ET8V96LNII_v7yz5W80IuYIkLPyEPkf2dXWXudbM8YOfzaLDGMV1oNFl2YpN6dWEIDGl4TmAFP2wEYHPklveu-fXdFjUWA-w5cKapzxv0fdhSlSk4HkzpG9YN8EhDuT1KZUzs-O2h_eIjhgu5_GhSND6qUA9VG54QBT3csNWMaG_75Lw",
"scope" : "GOOGLE",
"types" : [
"gym",
"spa",
"lodging",
"health",
"restaurant",
"food",
"point_of_interest",
"establishment"
],
"vicinity" : "Strada Alexandru Vaida Voevod 53-55, Cluj-Napoca"
},
{
"geometry" : {
"location" : {
"lat" : 46.7720145,
"lng" : 23.6257946
},
"viewport" : {
"northeast" : {
"lat" : 46.77209325,
"lng" : 23.62638825
},
"southwest" : {
"lat" : 46.77177825,
"lng" : 23.62401364999999
}
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "61f80d1a74e00b55a075cacde6fc95aa88bfa83f",
"name" : "Pizza Hut Iulius Mall",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 2322,
"html_attributions" : [
"\u003ca href=\"https://maps.google.com/maps/contrib/112054611800145890609/photos\"\u003etamara ionescu\u003c/a\u003e"
],
"photo_reference" : "CoQBdwAAAOdAY1sLwHqWZ1sEFvhZrqAoFCNo7DbthSnLMn1aI6lGxmGhfJdE7dLFDsJxjwSyh_0L3F2Mf_-Si12UmJ9CtaySu6SjHrqnaoF1WdafNDNLbkDbqjvesU0FqJid9V8poKU8Hhtb2PAvRe8lkfJF6N1ujIWWOxQlRfhHdjqN_BAAEhCTFmdXtQjfWiC3qbOZO3SqGhTIsansBf4AxGYnt6FnoslOVrqtyw",
"width" : 4128
}
],
"place_id" : "ChIJ-0XLwGoMSUcR87bDPcmCLHI",
"price_level" : 1,
"rating" : 4.1,
"reference" : "CmRRAAAAby6PokNes7fY7vSBVfxZvOfZj5wehpXYD8oUFAYRgmyOwreZ-hsxByGOCb0SRRfD73muHIScP0lK7fVlMk7g2-B1tOqxHt60oDKPkfgbe42QogLNVDnAmjo1nGrtHGzUEhB9TPDl0pw_CSCpmcQkERp8GhT_kUf3Xb1CQLliMvvc_BStebrt_w",
"scope" : "GOOGLE",
"types" : [ "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "Strada Alexandru Vaida Voevod 55, Cluj-Napoca"
},
{
"geometry" : {
"location" : {
"lat" : 46.7731014,
"lng" : 23.627801
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "32a93ffe70bbdd2c8485e346837ad61384e67bf1",
"name" : "Hanul Dacilor",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 2988,
"html_attributions" : [
"\u003ca href=\"https://maps.google.com/maps/contrib/102010465058487677046/photos\"\u003eחוסין מוחמד\u003c/a\u003e"
],
"photo_reference" : "CoQBdwAAALGMxPZEorGPgWzFhEX8GQ6KWqvl1Gs5s4w8n0-_wyFWNQ2AaxbUXjIZK_EXnEbI6UCM4YhVyjdObdpVyEtJ6oMJ1MG_GtW_BJi2Mc-75PPBX500rAbAy_jz-8L9NL4pdC1wHF6cwWj08xx2zBHammjvvB-DD_yeSjP5qt-GV09PEhDhOXdgy57rEKjg0N5pZ01CGhTeRa3PSqE-RkpI5vGjdDObho2AwQ",
"width" : 5312
}
],
"place_id" : "ChIJmRm5HmsMSUcRLIcHKiIRKmY",
"rating" : 4.4,
"reference" : "CmRRAAAA1mC_ed2g3YhFhzsrY8fXgE4Xida9jQ9BxpIk6raJpNmFUEJn00JciB3PRisZfOCpB3034vayac5_dqY8Bp_eQnS1HBSC0IdQp_Hu4Dcb_krbWQs6Sl7bTVSD5Rsu9LqmEhCDZdOMO2YJCNCh7n3-t0qbGhTI9ibzMsLx0OQUQ_oihQkUdr_Yhg",
"scope" : "GOOGLE",
"types" : [ "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "Iulius Mall, Strada Alexandru Vaida Voevod 53-55, Cluj-Napoca"
},
{
"geometry" : {
"location" : {
"lat" : 46.771945,
"lng" : 23.626012
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/restaurant-71.png",
"id" : "8d7bb32fd50d968c79c2e5048c12b95cec8cbb7d",
"name" : "Marty City",
"opening_hours" : {
"open_now" : false,
"weekday_text" : []
},
"photos" : [
{
"height" : 1125,
"html_attributions" : [
"\u003ca href=\"https://maps.google.com/maps/contrib/114164649734885665448/photos\"\u003eMarty City\u003c/a\u003e"
],
"photo_reference" : "CoQBcwAAAAfjwkLAWX73DgVUjKgP2uS39gFUilk6CrHCfdy-V4d1ZJrdZKzHOeqNqU0f5gHy9-MWeNGsY_2q7cJpi_b9_5oYneyQWs4U-zN6l5DxpeMdtrnNuNwd31b3BA_IEy7q_JZ8IlMScrqRspSBmq6tfFaTdnNZUwr0acvEOCVnwp2MEhCw0oErjn23GJoa5knp4gZuGhQ5ztJ1RbSe1zJbhCzAqJvAm-fN-Q",
"width" : 1500
}
],
"place_id" : "ChIJU22Cv2oMSUcR-rhmfyKJixA",
"rating" : 3.8,
"reference" : "CmRRAAAAHjaKSuIN_npID0s-cC2oJAJxwLZv-sOz0J9OW8AdiRzoqlQE1MMKH3aWDwKLB9P18uGxzgefxBnkc1_E4s-4gpJsTdmoATlxSoxsuQPGl4W0pXVHBZzpnvPHCSK5GyHEEhDarUaahHk1WNi7jzExovQ3GhS-KvRprEN1uPj-cw6PJcIqiDhl8A",
"scope" : "GOOGLE",
"types" : [ "restaurant", "food", "point_of_interest", "establishment" ],
"vicinity" : "str. Alexandru Vaida Voievod 53, Cluj-Napoca"
},
私は時々、応答には写真の物が（写真なしの場所のために存在することができます）がないと思います。コンソールに応答全体を出力し、それぞれの場所に応答が存在するかどうかを確認することで、これが正しいかどうかを調べることができます。私はここでそれを試してみました - https://repl.it/EW5r/0そしてあなたが与えた応答の例でうまくいくようです。 –