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javascript - 具有相关子项的Parse.com RESTful一对多请求

我的请求与Retrieving parent plus related children in one Parse REST API call非常相似，但是我没有看到最终的RESTful命令填充相关子级。

我显然可以进行多个RESTful调用，但这是多余的，并引入了不希望的延迟。我希望能够在我的RESTful查询中提出加入请求。

另外，我可以建立一个可以返回EventSeries + Children Events的工作，但这似乎是不合适的，并且我可以肯定Parse.com社区的常规要求来进行额外的开发和维护。

下面提供了Parse.com云作业以生成一些模拟测试数据。请注意，我正在使用工厂为我的Parse.Object生成随机数据（不要让您绊倒）。

var chance = require('cloud/lib/chance/chance.js').Chance();
var Factory = require('cloud/lib/rosie/src/rosie.js').Factory;

Parse.Cloud.define("buildRelationalEvents", function(request, response) {
  var EventSeries = Parse.Object.extend("EventSeries");
  var Event = Parse.Object.extend("Event");

  Factory.define('Event', Event)
    .attr('title', function(){ return chance.sentence({words: 3}); })
    .attr('datetime', function(){ return chance.date({ year: 2015, month: chance.pick([3,4,5,6,7,8,9]) }); })
    .attr('duration', function(){ return chance.pick([3600000, 1800000]); })
    .attr('link', function(){ return (chance.bool({likelihood: 30}) ? undefined : chance.url() ); })
    .attr('summary', function(){ return chance.paragraph(); });

  Factory.define('EventSeries', EventSeries)
    .attr('title', function(){ return chance.sentence({words: 3}); })
    .attr('propagandaImageSrc', function(){ return 'images/something.jpg'; });



  var events = Factory.buildList('Event', chance.integer({min: 5, max: 20}) );

  var query = new Parse.Query(Parse.User);
  query.equalTo('username','someone');
  return query.first().then(function(user){
    console.log(user.get('username')+" found");
    var promises = [];

    events.forEach(function(event){
      event.set('author', user);
      promises.push(event.save());
    });

    return Parse.Promise.when(promises);
  })
  .then(function(){
    var series = Factory.build('EventSeries');
    var relation = series.relation("events");
    relation.add(events);
    return series.save();
  })
  .then(response.success, response.error);

});


该关系是适当建立的：



我的curl命令获取SeriesEvent的子代：

curl -X GET \
-H "X-Parse-Application-Id: <APP_ID>" \
-H "X-Parse-REST-API-Key:<API_KEY>" \
-G \
--data-urlencode 'count=1' \
--data-urlencode 'include=event.eventseries' \
--data-urlencode 'where={"$relatedTo":{"object":{"__type":"Pointer","className":"EventSeries","objectId":"LbwZXewwjl"},"key":"events"}}' \
https://api.parse.com/1/classes/Event


我curl命令利用RESTful API的结果：

{"results":[
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.764Z","datetime":{"__type":"Date","iso":"2015-10-06T02:53:49.866Z"},"duration":3600000,"link":"http://nu.net/jidez","objectId":"6HFzsYftEz","summary":"Wimzunu ufpinu emune olo pa caledpe ze miufvo foko dujhekir zo en ewiniuh jebson. Fukovunad pe lewgecim girkaw ihozevdop tefnen sikabu guba usemarsew ki iviv paw zow logadah. Gawnenaz pimfe wazi adtekin vozo dodu vo mufas riane sekfuh sanof vugrofan. Bodozus akkuc giuciki dairujom coh kuc okacirut juke cab kikedfom panuniguh ga vav wa. Wehlo alag jovi nojru tazovuw efbufune iv kulup tuaf hajota hofob jubsiawo gevte gesmuc gocpu azobir woehi.","title":"Cozjesum pu fow.","updatedAt":"2015-05-01T05:45:05.764Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.862Z","datetime":{"__type":"Date","iso":"2015-09-03T08:35:52.008Z"},"duration":3600000,"link":"http://sug.gov/luvjos","objectId":"6swYOguX5w","summary":"Kaw furiha gari iv zitvacez kiwhoste en fuhepta wijuce laho uzter hosgelwik pe ke nurifrat. Vejubi sesnu riamasas vemijve rafhekdi irja rebfa cuppu wihiud hofora nenopfo juuf. Upiedew pinrebile hufluzsus bic fubvulu samup goh pir mup huv sa juzi geic zepwo nibko afhet zosig nibuv. Jezebo simkede tiokomic wa kipitkiz gesuz aw seha cel kihi cotos mok ipge veow.","title":"Ko wigidu kumu.","updatedAt":"2015-05-01T05:45:05.862Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.764Z","datetime":{"__type":"Date","iso":"2015-08-20T05:46:07.193Z"},"duration":1800000,"link":"http://me.com/jimkilodu","objectId":"Uc5sO2QnUx","summary":"Ub cododniz nuluja umibopani azehu zamid jas semefo abu bimokco fa haur korlaime et ik vev. Otubifdog ev du zoan uro iku diglited obead not wag awove sawuvo. Oworiknuf cug towigvu gewon torzup upejiol gahmot avgefcaf ja jazorhab vet vavcikoj tage dotuva hoopa sugfig. Zatfu huwu muruv otak iveuno zuowi gi vomicnik nofil oda lobugemo hufsu lohieb gebtu fo.","title":"Ra ojivicoz ke.","updatedAt":"2015-05-01T05:45:05.764Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.788Z","datetime":{"__type":"Date","iso":"2015-10-13T06:31:18.483Z"},"duration":1800000,"objectId":"cB7dYlRE9H","summary":"Jopewofo kusug huvmovab lojfevke lajnahnis emka jasin iro megbor erge owi imi fat vekvuci joz titjelo liduru delvu. Ref ud gad hijlim dumri gu ovwaku mot ofegeecu nemzepip rajlot tohahhew. Evuriz vo cuvsidur ci so kogmo ibammow sirujdaz gefihan dokjimbaj piozided sejozguh fumuw tip.","title":"Uv weso beg.","updatedAt":"2015-05-01T05:45:05.788Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.763Z","datetime":{"__type":"Date","iso":"2015-07-10T06:52:48.764Z"},"duration":1800000,"link":"http://uku.net/okuhaka","objectId":"g2PFwdTxs5","summary":"Picusu upwo milcumfu do apusur dotul nagit fub kabzewa ni rat nup akujif bafi vebiz uk ukogelles ajehepa. Zuhemah roivkik vu ic mipure jujawnij unume ica vug fina pabojul ucenaro ibuter palpat tughezgo ja se. Ovi tuh nupo lojejcuf unahil cif canakej osfe hiwmedhuh farusim gehkil sihbal etag tisnuri jefuf. Ewiire cog undise ilaufu so vew duawoje pa ursi bemfabhu is jarmadwis hawoh ga pukduma kuhju vakujeg co.","title":"Coz fa wawojkum.","updatedAt":"2015-05-01T05:45:05.763Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.766Z","datetime":{"__type":"Date","iso":"2015-06-25T06:21:50.103Z"},"duration":3600000,"objectId":"oQplFbI9HI","summary":"Ve mizo ku sisuhu ila pijamhi gumgifsen cikfos luwsastaw waif bo cum ho ipibik lezde wodfa vad bimij. Ta pi webco rabubjac apoficro irizi ni tecguk cef eba johlu murravca mukuhe agile sikef wij wak. Va lanzep mi olpa lol wiirve zi ewa lucvat ruob ka fudjujoka dewpof. Betejaw firpifis ow zivi awa totju bagwu nar guz dejuf pigiat le savrur na. Za irikeremi denupem wotpag no mobsosnom kumehsil jo gawi ifa fu adjogzuv sucpip ibzitra don vonugabap. Jek vude ozu to nidu biznej ompim ni vegtom po ribil cetisdun. Dur fuh sa zilob tuj havuz toucefo uzo osdengah ve hir gih fidguk halo ejaru nohzuvsib ideciba ifrijfen.","title":"Tor mocehsi voz.","updatedAt":"2015-05-01T05:45:05.766Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.765Z","datetime":{"__type":"Date","iso":"2015-04-29T11:56:12.493Z"},"duration":3600000,"link":"http://je.edu/jak","objectId":"ob4kmXpTsE","summary":"Camze vav cidoltar jat jekaf ujihva udloli do ere mel bultaane se erovkid uvuwikvo oru bueg. Kiszo teewi ga lewoefa akezoz sat dohorura sa eglo suj am agokepzi idemejel vel beg ote ovutobros. Pemtul faslar giamto nagosin vurgekur moimiloc tuz ucamid apewomnah ihesa fan hakkokag cihoupu rofkugo. Hokez ijpep hifat ujufi fu bozos sil onadibvag urzer datwem gel tioke me zuspaaj tel no ecmocnuf opa. Dosulja kuwoazo reka paipaage can katbodpo zoumofam wokokeno boghamlal rekvo wizboure lur wi. Zejovjag kizajnec acusasce gufnot edavo nan za lo zis jarfogu da pen weig icodiabo vezujpo.","title":"Re lazuzed ujfofsa.","updatedAt":"2015-05-01T05:45:05.765Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.764Z","datetime":{"__type":"Date","iso":"2015-05-22T02:49:03.830Z"},"duration":1800000,"objectId":"q2xZ6wiv1C","summary":"Gar sabkumi di rarul si hikuf zinsakdes kasefov revnij faclenud witvovdi tusaveho ik tojca. Bizu elma vegzez gojav lezu jas puffapes iluleoju uwzuwem nuce momvuw vuvi babgi unulucudo ul rizfoj livasbet kow. Evicad ukinufhe ruzetta epazuko vu mid uz levbe rucdidek zocboces suvjic imutu. Toutuga mehpuw lacacuzuj wub vallo feuva va huboma dur ur fu selkejiro sopkiih. Ikiabfi rare ato keukgim sasnu ivocaiw peczin ecumac huzebimuh vob zuhiwca isna ucuvac purvuw fogo jetka.","title":"Viefvo ci uhijekas.","updatedAt":"2015-05-01T05:45:05.764Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.784Z","datetime":{"__type":"Date","iso":"2015-05-05T07:11:03.029Z"},"duration":1800000,"link":"http://pub.edu/jiv","objectId":"qAlY38N4ln","summary":"Uf asobogec wo pefgiegu buv nuku ijuija masocwo sivutiki jat zepah ne. Bu wo joflazno ifbod fufkovref zizabosi bovcu cof ahadob gemgug jeska jikom jad sa ledwig abuiwoho. Gejgenig vejoreb cawumizu ruosedel dikpo otfid miludab davi nepip it wawulak vifri icvoze lubu fek neh ceekewo.","title":"Tesvulile tu til.","updatedAt":"2015-05-01T05:45:05.784Z"},
        {"author":{"__type":"Pointer","className":"_User","objectId":"8dlJ2EJds7"},"createdAt":"2015-05-01T05:45:05.774Z","datetime":{"__type":"Date","iso":"2015-09-03T09:25:08.198Z"},"duration":3600000,"link":"http://ha.com/goiguad","objectId":"zsvJjVuyiB","summary":"Ameno jihus erhioza elevfip oreofula pugbod catreja fez losuro pafra ta uk labasa heufubik. Fakef ofuhjen harcowvup pavmoehu caiv suji jualles mompih ebawo ijeeg seve rudpic kep oje em zobela itetoc. Kune lap cuuvwi hutojbek gaslur ebmoh gohtam nacavfe cubtivow mav horu abemogu sogmedgap. Je wegeru aji fivcij fiev kiw ikrahhe wa lu jiepe kizesij imocoli jis.","title":"Tosaj kersad wisnuz.","updatedAt":"2015-05-01T05:45:05.774Z"}
    ],"count":10}


为了提供更多上下文，请对EventSeries进行RESTful调用：

curl -X GET \
-H "X-Parse-Application-Id: <APP_ID>" \
-H "X-Parse-REST-API-Key: <API_KEY>" \
-G \
--data-urlencode 'count=1' \
--data-urlencode 'limit=1' \
--data-urlencode 'include=event' \
https://api.parse.com/1/classes/EventSeries


结果是：

{"results":[
{"createdAt":"2015-05-01T05:45:05.963Z","events":{"__type":"Relation","className":"Event"},"objectId":"LbwZXewwjl","propagandaImageSrc":"images/something.jpg","seqId":1,"title":"Ah nubem eferifed.","updatedAt":"2015-05-01T05:45:05.963Z"}
],"count":1}


现在，对include参数稍作修改：

curl -X GET \
-H "X-Parse-Application-Id:<APP_ID>" \
-H "X-Parse-REST-API-Key: <API_KEY>" \
-G \
--data-urlencode 'count=1' \
--data-urlencode 'limit=1' \
--data-urlencode 'include=events' \
https://api.parse.com/1/classes/EventSeries


结果是：

{"code":102,"error":"field events cannot be included because it is not a pointer to another object"}

最佳答案

在与FB的Hector交谈之后，这似乎是一个设计决定，不确定是使用数组数据类型比使用关系更好（因为该关系指向单个对象，并且数组中包含所有对象的指针），所以下面是解决方案：

var chance = require('cloud/lib/chance/chance.js').Chance();
var Factory = require('cloud/lib/rosie/src/rosie.js').Factory;



Parse.Cloud.define("buildRelationalEvents", function(request, response) {
  var EventSeries = Parse.Object.extend("EventSeries");
  var Event = Parse.Object.extend("Event");

  Factory.define('Event', Event)
    .attr('title', function(){ return chance.sentence({words: 3}); })
    .attr('datetime', function(){ return chance.date({ year: 2015, month: chance.pick([3,4,5,6,7,8,9]) }); })
    .attr('duration', function(){ return chance.pick([3600000, 1800000]); })
    .attr('link', function(){ return (chance.bool({likelihood: 30}) ? undefined : chance.url() ); })
    .attr('summary', function(){ return chance.paragraph(); });

  Factory.define('EventSeries', EventSeries)
    .attr('title', function(){ return chance.sentence({words: 3}); })
    .attr('propagandaImageSrc', function(){ return 'images/BTF-YOGA-SERIES-2.jpg'; });



  var events = Factory.buildList('Event', chance.integer({min: 5, max: 20}) );

  var query = new Parse.Query(Parse.User);
  query.equalTo('username','obi.yoga');
  return query.first().then(function(user){
    console.log(user.get('username')+" found");
    var promises = [];

    events.forEach(function(event){
      event.set('author', user);
      promises.push(event.save());
    });

    return Parse.Promise.when(promises);
  })
  .then(function(){
    var series = Factory.build('EventSeries');
    // var relation = series.relation("events");
    // relation.add(events);
    series.set('events', events);
    return series.save();
  })
  .then(response.success, response.error);

});


获取父级和子级的相关curl命令：

curl -X GET \
-H "X-Parse-Application-Id: <APP_ID>" \
-H "X-Parse-REST-API-Key: <API_KEY>" \
-G \
--data-urlencode 'count=1' \
--data-urlencode 'limit=1' \
--data-urlencode 'include=events' \
https://api.parse.com/1/classes/EventSeries

关于javascript - 具有相关子项的Parse.com RESTful一对多请求，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/29989835/

10-12 23:31
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