node.js - Getting object as array in javascript with array.map() function -
when using array.map function getting data in object. however, need in array. problem occurs function images.
ebit:
part of code involving array.map function looks following (sorry if code seems confusing given problem @ hand, there seemed confusion since had left out rest of code before):
function getvenues(page, size, venues) { page = page || 0; size = size || 200; venues = venues || []; return axios .get(`https://app.ticketmaster.com/discovery/v2/venues.json?apikey=myapikey&page=${page}&size=${size}&countrycode=dk`) .then(response => response.data._embedded.venues) .then(rawvenues => { rawvenues.foreach(venue => venues.push(venue)); if (rawvenues.length < size) { // done return compiled list. return venues; } // recurse on next set of venues adding promise chain. return getvenues(page + 1, size, venues); }); } function getevents(page, size, events) { page = page || 0; size = size || 200; events = events || []; return axios .get(`https://app.ticketmaster.com/discovery/v2/events.json?apikey=myapikey&countrycode=dk&size=${size}&page=${page}`) .then(response => response.data._embedded.events) .then(rawevents => { rawevents.foreach(event => events.push(event)); if (rawevents.length < size) { // done return compiled list. return events; } // recurse on next set of events adding promise chain. return getevents(page + 1, size, events); }); } app.get('/tm2', (req, res) => { getvenues().then(rawvenues => { const venuestobeinserted = rawvenues.map(venue => { return { sourceid: venue.id, venue: venue.name, postalcode: venue.postalcode, city: venue.city.name, country: venue.country.name, countrycode: venue.country.countrycode, address: !!venue.address ? venue.address.line1 : null, longitude: !!venue.location ? venue.location.longitude : null, latitude: !!venue.location ? venue.location.latitude : null, source: 'ticketmaster' }; }); // return promise errors bubble chain... return venue.create(venuestobeinserted).then(venues => { console.log("venues inserted"); // return promise errors bubble chain... return getevents().then(rawevents => { const eventstobeinserted = rawevents.map(event => { return { name: event.name.trim(), slug: slugify(event.name.trim()).tolowercase(), sourceid: !!event._embedded.venues ? event._embedded.venues.map(sourceids => { return { sourceid: !!sourceids ? sourceids.id : [] } }) : [], tags: !!event.classifications ? event.classifications.map(tag => { return { tags: !!tag ? [tag.segment.name, tag.genre.name] : [], } }) : [], images: !!event.images ? event.images.map(image => { return { images: !!image ? image.url : [] } }) : [] } }) // return promise errors bubble chain... return event.create(eventstobeinserted).then(events => { console.log("events inserted"); }); }); }); }).then(() => { // fired after of promises above have resolved... return event.find({}).select({ genres: 1, tag: 1 }).limit(30).populate('event').populate('venue').then(events => { console.log(util.inspect(events)); res.send(events); }); }).catch(err => { // catches error during execution. console.error(err); res.status(500).send(err); }); });my current output looks this:
images: [ { images: 'url_1' }, { images: 'url_2' }, { images: 'url_3' } ] i want in following format:
images: [ { 'url_1' }, { 'url_2' }, { 'url_3' } ]
i avoid commenting further on how better organize code. now, obtain desired result, remove object literal you've wrapped each of calls map() with. example fixing images, change this:
images: !!event.images ? event.images.map(image => { return { images: !!image ? image.url : [] } }) : [] to this:
images: !!event.images ? event.images.map(image => { return !!image ? image.url : '' }).filter(boolean) : [] i'm not sure why input event.images array contain malformed objects without url property, or missing itself, .filter(boolean) deals removing empty strings, specified in third expression of ternary operator ... ? ... : ''.
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