I'm writing an iOs app with Parse.com and Cloud Code. Actually I want to retrieve objects which contain one picture and other informations from a website and I want to add them to a class named News . When I run my code, every object is saved (in my class, one row = one retrieved object) but unfortunately the only first one has its picture saved.... Any idea ?
I made a lot of searches about promises (series / parallels) and I think the problem comes from here..
Note : don't worry about myLink, myImgLink : I put this to make my code easy to read !
Parse.Cloud.define("rajouteNews", function(request, response) {
Parse.Cloud.httpRequest({ url: 'myUrl'}).then(function(httpResponse) {
var news = [];
var NewsClass = Parse.Object.extend("news");
for (var i = 0; i < 10 ; ++i) {
var maNews = new NewsClass();
maNews.set("link", myLink[i]); // "Other informations"
maNews.set("imgLink", myImgLink[i]);
maNews.set("title", myTitle[i]);
var promises = [];
promises.push(Parse.Cloud.httpRequest({
url: $('img').attr('src'),
method: 'GET',
}).then(function(httpResponse){
var imgFile = new Parse.File("photo.jpg", {base64:httpResponse.buffer.toString('base64')});
maNews.set("image",imgFile); // The picture
return maNews.save();
}));
news.push(maNews);
}
promises.push(Parse.Object.saveAll(news, {
success: function (list) {
response.success(news.length.toString() + " ont été sauvegardées");
},
error: function (list, err) {
response.error("Error adding news");
}
}));
return Parse.Promise.when(promises);
}).then(function(bla,result){
response.success("Job done");
}, function(error) {
response.error(error);
}
);
});
Your promises
array should put out of the for loop scope. Otherwise , your promise
array would be assigned to be a new blank array each loop.
Parse.File
would be saved automaticly when its parent do save, you don't need to save it in advance.
So I improve your code as following, try it and tell me weather it works.
Parse.Cloud.define("rajouteNews", function(request, response) {
Parse.Cloud.httpRequest({
url: 'myUrl'
}).then(function(httpResponse) {
var promises = [];
var NewsClass = Parse.Object.extend("news");
for (var i = 0; i < 10; ++i) {
var maNews = new NewsClass();
maNews.set("link", myLink[i]); // "Other informations"
maNews.set("imgLink", myImgLink[i]);
maNews.set("title", myTitle[i]);
var maNewsPromise = Parse.Cloud.httpRequest({
url: $('img').attr('src'),
method: 'GET',
}).then(function(httpResponse) {
var imgFile = new Parse.File("photo.jpg", {
base64: httpResponse.buffer.toString('base64')
});
maNews.set("image", imgFile); // The picture
return maNews.save();
});
promises.push(maNewsPromise);
}
return Parse.Promise.when(promises)
}).then(function(bla, result) {
// this function is call when `Parse.Promise.when(promises)` is done,
//I can't figure out why you take two params.
response.success("Job done");
}, function(error) {
response.error(error);
});
});
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.