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Mongoose : get content of multiple subdocument in one object

Hello I've been trying to select all the subdocument of multiple document returned in ONE single object and if it's possible sorted by value.
Here is what I mean :
My collection :
{
userId: 1,
...
items : [
{name: "candle", value:5},
{name: "shoes", value: 200}
]
},
{
userId: 2,
...
items : [
{name: "burger", value:17},
{name: "car", value: 5000}
]
},
{
userId: 3,
...
items : [
{name: "chips", value:2},
]
}
And I want to make a query that return me something like that :
[
{userId:1, name: "candle", value:5},
{userId:1, name: "shoes", value: 200},
{userId:2, name: "burger", value:17},
{userId:2, name: "car", value: 5000},
{userId:3, name: "chips", value:2}
]
I've been trying this :
Mymodel.find({}).select("items"); //It return me all the items but in separate object. [ {items: []} ...]
Also if it is possible I would like to sort them : I want to get the 3 most valuable items in the users collection. I tried to use the aggregate method following some example in the mongoose doc but I didn't succeed to make it work. I also have been thinking to make a new database containing only the users items so I can sort them easily but I feel like there is a better solution to do this.
So my question is do you have an idea how could I make it work ? thank you in advance

I'm pasting just an option
var pipeline = [
{
"$unwind" : "$items"
},
{
"$addFields" : {
"name" : "$items.name",
"value" : "$items.value"
}
},
{
"$unset" : "items"
},
{
"$project" : {
"_id" : 0,
"name" : 1,
"value" : 1,
"userId" : 1
}
}
]
Run db.collname.aggregate(pipeline) or review the syntax for the driver.

Object with Key:Value where every Value is an Array of Objects - cannot iterate [duplicate]

This question already has answers here:
How do I return the response from an asynchronous call?
(41 answers)
Closed 3 years ago.
I am downloading data via d3.json when create an object with each record that holds downloaded data. Each object will be stored in an array. I lost the ability to iterate over the array.
I have tried using multi-dimensional array, and still cannot iterate over the created object.
var datamodel = {
"mkt":[],
"confidence":[],
"homes":[],
"combined":[]
}
var tObject={};
// console.log(datamodel)
const url1 = "https://www.quandl.com/api/v3/datasets/YALE/SPCOMP.json?start_date='2015-01-01'&end_date='2018-09-30'&api_key=4QuxetVDNP8R3sYg9CED";
// Fetch the JSON data and console log it
d3.json(url1).then(function(data) {
data.dataset.data.forEach(element => {
tObject['date']=element[0];
tObject['spx'] = element[1];
tObject['rate']=element[5];
datamodel['mkt'].push(tObject); //creating an array of objects
tObject={};
});
});
I repeat the code above for other datasets to fill "confidence, homes"
I need to iterate after downloading over the datamodel, and update the "combined" so that I can have more stats, like change per date, ratios.
For instance: going to debug console in any browser, I can access the datamodel variable via datamodel.mkt
The debug console allows me to iterate over the objects, not sure why code ran in JS file does not allow me to iterate not get length of the array. I am so lost.

I hit the API in browser and copied the data in my js file. I call this function in HTML onload. Half of this function does what your code did to fill data in datamodel.mkt
Then it loops over the data present in datamodel.mkt and copies the elements in datamodel.combined
Please note that the commented forEach loop also works. You can uncomment the console.log to view the datamodel object in console
Hope this helps.
function setData(){
var data = {"dataset":{"id":539984,"dataset_code":"SPCOMP","database_code":"YALE","name":"S\u0026P Composite","description":"This data set consists of monthly stock price, dividends, and earnings data and the consumer price index (to allow conversion to real values), all starting January 1871. Further info at http://www.econ.yale.edu/~shiller/data.htm.","refreshed_at":"2019-08-24T02:51:26.805Z","newest_available_date":"2019-08-31","oldest_available_date":"1871-01-31","column_names":["Year","S\u0026P Composite","Dividend","Earnings","CPI","Long Interest Rate","Real Price","Real Dividend","Real Earnings","Cyclically Adjusted PE Ratio"],"frequency":"monthly","type":"Time Series","premium":false,"limit":null,"transform":null,"column_index":null,"start_date":"2015-01-01","end_date":"2018-09-30","data":[["2018-09-30",2901.5,52.34,130.39,252.439,3.0,2944.5129194578,53.115907704436,132.32295004932,32.6228911205],["2018-08-31",2857.82,51.89,127.75333333333,252.146,2.89,2903.555479266,52.720428095231,129.79784975768,32.390276880301],["2018-07-31",2793.64,51.44,125.11666666667,252.006,2.89,2839.9251892812,52.29226089855,127.18960684468,31.886366962159],["2018-06-30",2754.35,50.99,122.48,251.989,2.91,2800.1731263567,51.838302217557,124.51765553258,31.630556496455],["2018-05-31",2701.49,50.66,120.13333333333,251.588,2.976,2750.8111875864,51.58490120753,122.32661136461,31.243615074865],["2018-04-30",2653.63,50.33,117.78666666667,250.546,2.87,2713.3151215246,51.462016206605,120.43590997262,30.970179293325],["2018-03-31",2702.77,50.0,115.44,249.554,2.84,2774.5457779178,51.327818828791,118.50566811191,31.808409057643],["2018-02-28",2705.16,49.643333333333,113.58666666667,248.991,2.86,2783.2783925925,51.076911163456,116.86677128892,32.03538233925],["2018-01-31",2789.8,49.286666666667,111.73333333333,247.867,2.58,2883.3787928607,50.939898715844,115.48122581868,33.307343828031],["2017-12-31",2664.34,48.93,109.88,246.524,2.4,2768.7119778399,50.846767708215,114.18440293846,32.086132007706],["2017-11-30",2593.61,48.676666666667,108.94666666667,246.669,2.35,2693.6268919585,50.553775758202,113.14795637068,31.29891333388],["2017-10-31",2557.0,48.423333333333,108.01333333333,246.663,2.36,2655.6697042118,50.291896484272,112.18135979048,30.920393290334],["2017-09-30",2492.84,48.17,107.08,246.819,2.2,2587.3975149806,49.997167205523,111.14172024844,30.168114410679],["2017-08-31",2456.22,47.853333333333,106.06,245.519,2.21,2562.8872302144,49.931478826486,110.66590925753,29.914959397497],["2017-07-31",2454.1,47.536666666667,105.04,244.786,2.32,2568.3429837695,49.749588160679,109.92981011986,30.002220744019],["2017-06-30",2433.99,47.22,104.02,244.955,2.19,2545.5393875916,49.384085342206,108.78722061195,29.748503240633],["2017-05-31",2395.35,46.94,102.77666666667,244.733,2.3,2507.4009520069,49.135784201558,107.58440805899,29.313344980271],["2017-04-30",2359.31,46.66,101.53333333333,244.524,2.3,2471.7859389569,48.884433123129,106.37375574586,28.904245956275],["2017-03-31",2366.82,46.38,100.29,243.801,2.48,2487.0074615157,48.735183100151,105.3827406881,29.086921742465],["2017-02-28",2329.91,46.153333333333,98.376666666667,243.603,2.42,2450.2130769633,48.536424530897,103.4562687549,28.655106525184],["2017-01-31",2275.12,45.926666666667,96.463333333333,242.839,2.43,2400.1214199531,48.45000545629,101.76329713308,28.063573742124],["2016-12-31",2246.63,45.7,94.55,241.432,2.49,2383.8782004353,48.49184501226,100.32612573105,27.865098223924],["2016-11-30",2164.99,45.476666666667,92.73,241.353,2.14,2298.0026949634,48.27066293976,98.427147425141,26.850953531056],["2016-10-31",2143.02,45.253333333333,90.91,241.729,1.76,2271.1447214649,47.958894050776,96.34523552201,26.525143085071],["2016-09-30",2157.69,45.03,89.09,241.428,1.63,2289.5427262476,47.781705881256,94.534136730205,26.727873346479],["2016-08-31",2170.95,44.84,88.366666666667,240.849,1.56,2309.1508982288,47.694477660277,93.992016263302,26.948872433724],["2016-07-31",2148.9,44.65,87.643333333333,240.628,1.5,2287.7964664337,47.53600084986,93.308254598384,26.694003256096],["2016-06-30",2083.89,44.46,86.92,241.018,1.64,2214.9945027446,47.257127579683,92.388428457626,25.840372927671],["2016-05-31",2065.55,44.266666666667,86.76,240.229,1.81,2202.7115000166,47.206165783482,92.521241190697,25.69470992345],["2016-04-30",2075.54,44.073333333333,86.6,239.261,1.81,2222.3196911532,47.190146430049,92.72424778798,25.922337543674],["2016-03-31",2021.95,43.88,86.44,238.132,1.89,2175.2039979402,47.20589106042,92.991732526498,25.372298620188],["2016-02-29",1904.42,43.716666666667,86.47,237.111,1.78,2057.5877800903,47.232689805618,93.42456776573,24.00260677729],["2016-01-31",1918.6,43.553333333333,86.5,236.916,2.09,2074.6144044725,47.094950847558,93.533902838981,24.206167203878],["2015-12-31",2054.08,43.39,86.53,236.525,2.24,2224.7829278089,46.995896575415,93.721017070077,25.965424037124],["2015-11-30",2080.62,43.096666666667,87.906666666667,237.336,2.26,2245.8279922768,46.518682111016,94.886741792227,26.225851890972],["2015-10-31",2024.81,42.803333333333,89.283333333333,237.838,2.07,2180.9734222979,46.104539381848,96.169308258142,25.491441046067],["2015-09-30",1944.41,42.51,90.66,237.945,2.17,2093.4307689277,45.767992340667,97.608237723003,24.496752170486],["2015-08-31",2039.87,42.253333333333,92.076666666667,238.316,2.17,2192.7879220761,45.420835151647,98.979151892865,25.693658417058],["2015-07-31",2094.14,41.996666666667,93.493333333333,238.654,2.32,2247.9380311036,45.080989895413,100.35967970367,26.3811363364],["2015-06-30",2099.29,41.74,94.91,238.638,2.36,2253.6173464096,44.808477170442,101.88722013049,26.495895292785],["2015-05-31",2111.94,41.43,96.356666666667,237.805,2.2,2275.1389967621,44.631480362061,103.80257485124,26.806111379651],["2015-04-30",2094.86,41.12,97.803333333333,236.599,1.94,2268.2422722624,44.523320047845,105.89808151133,26.791371680192],["2015-03-31",2079.99,40.81,99.25,236.119,2.04,2256.7198666245,44.277490640313,107.68294403458,26.728605452928],["2015-02-28",2082.2,40.353333333333,100.27,234.722,1.98,2272.5632823084,44.042600927906,109.43709553216,26.995513699383],["2015-01-31",2028.18,39.896666666667,101.29,233.707,1.88,2223.2183358864,43.733298264494,111.03047325283,26.492295420383]],"collapse":null,"order":null,"database_id":175}}
var datamodel = {
"mkt":[],
"confidence":[],
"homes":[],
"combined":[]
}
var tObject={};
data.dataset.data.forEach(element => {
tObject['date']=element[0];
tObject['spx'] = element[1];
tObject['rate']=element[5];
datamodel['mkt'].push(tObject); //creating an array of objects
tObject={};
});
/*
datamodel.mkt.forEach(element => {
datamodel["combined"].push(element);
});*/
for(var i=0;i<datamodel.mkt.length; i++)
{
datamodel.combined[i] = datamodel.mkt[i];
}
document.getElementById("foo").innerHTML = "Length of datamodel.mkt = " + datamodel.mkt.length + "<br> Length of datamodel.combined = " + datamodel.combined.length;
//console.log(datamodel);
}
<html>
<head></head>
<body onload="setData()">
<div id="foo"></div>
</body>
</html>

You can use map() or forEach() to get your work done. In "forEach(), you are pushing the objects, but the array is getting updated only by the last object. You can do something like this:
let data ={
"dataset": {
"id": 539984,
"dataset_code": "SPCOMP",
"database_code": "YALE",
"name": "S&P Composite",
"description": "This data set consists of monthly stock price, dividends, and earnings data and the consumer price index (to allow conversion to real values), all starting January 1871. Further info at http://www.econ.yale.edu/~shiller/data.htm.",
"refreshed_at": "2019-08-24T02:51:26.805Z",
"newest_available_date": "2019-08-31",
"oldest_available_date": "1871-01-31",
"column_names": [
"Year",
"S&P Composite",
"Dividend",
"Earnings",
"CPI",
"Long Interest Rate",
"Real Price",
"Real Dividend",
"Real Earnings",
"Cyclically Adjusted PE Ratio"
],
"frequency": "monthly",
"type": "Time Series",
"premium": false,
"limit": null,
"transform": null,
"column_index": null,
"start_date": "2015-01-01",
"end_date": "2018-09-30",
"data": [
[
"2018-09-30",
2901.5,
52.34,
130.39,
252.439,
3.0,
2944.5129194578,
53.115907704436,
132.32295004932,
32.6228911205
],
[
"2018-08-31",
2857.82,
51.89,
127.75333333333,
252.146,
2.89,
2903.555479266,
52.720428095231,
129.79784975768,
32.390276880301
],
[
"2018-07-31",
2793.64,
51.44,
125.11666666667,
252.006,
2.89,
2839.9251892812,
52.29226089855,
127.18960684468,
31.886366962159
],
[
"2018-06-30",
2754.35,
50.99,
122.48,
251.989,
2.91,
2800.1731263567,
51.838302217557,
124.51765553258,
31.630556496455
],
[
"2018-05-31",
2701.49,
50.66,
120.13333333333,
251.588,
2.976,
2750.8111875864,
51.58490120753,
122.32661136461,
31.243615074865
],
[
"2018-04-30",
2653.63,
50.33,
117.78666666667,
250.546,
2.87,
2713.3151215246,
51.462016206605,
120.43590997262,
30.970179293325
],
[
"2018-03-31",
2702.77,
50.0,
115.44,
249.554,
2.84,
2774.5457779178,
51.327818828791,
118.50566811191,
31.808409057643
],
[
"2018-02-28",
2705.16,
49.643333333333,
113.58666666667,
248.991,
2.86,
2783.2783925925,
51.076911163456,
116.86677128892,
32.03538233925
],
[
"2018-01-31",
2789.8,
49.286666666667,
111.73333333333,
247.867,
2.58,
2883.3787928607,
50.939898715844,
115.48122581868,
33.307343828031
],
[
"2017-12-31",
2664.34,
48.93,
109.88,
246.524,
2.4,
2768.7119778399,
50.846767708215,
114.18440293846,
32.086132007706
],
[
"2017-11-30",
2593.61,
48.676666666667,
108.94666666667,
246.669,
2.35,
2693.6268919585,
50.553775758202,
113.14795637068,
31.29891333388
],
[
"2017-10-31",
2557.0,
48.423333333333,
108.01333333333,
246.663,
2.36,
2655.6697042118,
50.291896484272,
112.18135979048,
30.920393290334
],
[
"2017-09-30",
2492.84,
48.17,
107.08,
246.819,
2.2,
2587.3975149806,
49.997167205523,
111.14172024844,
30.168114410679
],
[
"2017-08-31",
2456.22,
47.853333333333,
106.06,
245.519,
2.21,
2562.8872302144,
49.931478826486,
110.66590925753,
29.914959397497
],
[
"2017-07-31",
2454.1,
47.536666666667,
105.04,
244.786,
2.32,
2568.3429837695,
49.749588160679,
109.92981011986,
30.002220744019
],
[
"2017-06-30",
2433.99,
47.22,
104.02,
244.955,
2.19,
2545.5393875916,
49.384085342206,
108.78722061195,
29.748503240633
],
[
"2017-05-31",
2395.35,
46.94,
102.77666666667,
244.733,
2.3,
2507.4009520069,
49.135784201558,
107.58440805899,
29.313344980271
],
[
"2017-04-30",
2359.31,
46.66,
101.53333333333,
244.524,
2.3,
2471.7859389569,
48.884433123129,
106.37375574586,
28.904245956275
],
[
"2017-03-31",
2366.82,
46.38,
100.29,
243.801,
2.48,
2487.0074615157,
48.735183100151,
105.3827406881,
29.086921742465
],
[
"2017-02-28",
2329.91,
46.153333333333,
98.376666666667,
243.603,
2.42,
2450.2130769633,
48.536424530897,
103.4562687549,
28.655106525184
],
[
"2017-01-31",
2275.12,
45.926666666667,
96.463333333333,
242.839,
2.43,
2400.1214199531,
48.45000545629,
101.76329713308,
28.063573742124
],
[
"2016-12-31",
2246.63,
45.7,
94.55,
241.432,
2.49,
2383.8782004353,
48.49184501226,
100.32612573105,
27.865098223924
],
[
"2016-11-30",
2164.99,
45.476666666667,
92.73,
241.353,
2.14,
2298.0026949634,
48.27066293976,
98.427147425141,
26.850953531056
],
[
"2016-10-31",
2143.02,
45.253333333333,
90.91,
241.729,
1.76,
2271.1447214649,
47.958894050776,
96.34523552201,
26.525143085071
],
[
"2016-09-30",
2157.69,
45.03,
89.09,
241.428,
1.63,
2289.5427262476,
47.781705881256,
94.534136730205,
26.727873346479
],
[
"2016-08-31",
2170.95,
44.84,
88.366666666667,
240.849,
1.56,
2309.1508982288,
47.694477660277,
93.992016263302,
26.948872433724
],
[
"2016-07-31",
2148.9,
44.65,
87.643333333333,
240.628,
1.5,
2287.7964664337,
47.53600084986,
93.308254598384,
26.694003256096
],
[
"2016-06-30",
2083.89,
44.46,
86.92,
241.018,
1.64,
2214.9945027446,
47.257127579683,
92.388428457626,
25.840372927671
],
[
"2016-05-31",
2065.55,
44.266666666667,
86.76,
240.229,
1.81,
2202.7115000166,
47.206165783482,
92.521241190697,
25.69470992345
],
[
"2016-04-30",
2075.54,
44.073333333333,
86.6,
239.261,
1.81,
2222.3196911532,
47.190146430049,
92.72424778798,
25.922337543674
],
[
"2016-03-31",
2021.95,
43.88,
86.44,
238.132,
1.89,
2175.2039979402,
47.20589106042,
92.991732526498,
25.372298620188
],
[
"2016-02-29",
1904.42,
43.716666666667,
86.47,
237.111,
1.78,
2057.5877800903,
47.232689805618,
93.42456776573,
24.00260677729
],
[
"2016-01-31",
1918.6,
43.553333333333,
86.5,
236.916,
2.09,
2074.6144044725,
47.094950847558,
93.533902838981,
24.206167203878
],
[
"2015-12-31",
2054.08,
43.39,
86.53,
236.525,
2.24,
2224.7829278089,
46.995896575415,
93.721017070077,
25.965424037124
],
[
"2015-11-30",
2080.62,
43.096666666667,
87.906666666667,
237.336,
2.26,
2245.8279922768,
46.518682111016,
94.886741792227,
26.225851890972
],
[
"2015-10-31",
2024.81,
42.803333333333,
89.283333333333,
237.838,
2.07,
2180.9734222979,
46.104539381848,
96.169308258142,
25.491441046067
],
[
"2015-09-30",
1944.41,
42.51,
90.66,
237.945,
2.17,
2093.4307689277,
45.767992340667,
97.608237723003,
24.496752170486
],
[
"2015-08-31",
2039.87,
42.253333333333,
92.076666666667,
238.316,
2.17,
2192.7879220761,
45.420835151647,
98.979151892865,
25.693658417058
],
[
"2015-07-31",
2094.14,
41.996666666667,
93.493333333333,
238.654,
2.32,
2247.9380311036,
45.080989895413,
100.35967970367,
26.3811363364
],
[
"2015-06-30",
2099.29,
41.74,
94.91,
238.638,
2.36,
2253.6173464096,
44.808477170442,
101.88722013049,
26.495895292785
],
[
"2015-05-31",
2111.94,
41.43,
96.356666666667,
237.805,
2.2,
2275.1389967621,
44.631480362061,
103.80257485124,
26.806111379651
],
[
"2015-04-30",
2094.86,
41.12,
97.803333333333,
236.599,
1.94,
2268.2422722624,
44.523320047845,
105.89808151133,
26.791371680192
],
[
"2015-03-31",
2079.99,
40.81,
99.25,
236.119,
2.04,
2256.7198666245,
44.277490640313,
107.68294403458,
26.728605452928
],
[
"2015-02-28",
2082.2,
40.353333333333,
100.27,
234.722,
1.98,
2272.5632823084,
44.042600927906,
109.43709553216,
26.995513699383
],
[
"2015-01-31",
2028.18,
39.896666666667,
101.29,
233.707,
1.88,
2223.2183358864,
43.733298264494,
111.03047325283,
26.492295420383
]
],
"collapse": null,
"order": null,
"database_id": 175
}
}
var datamodel = {
"mkt":[],
"confidence":[],
"homes":[],
"combined":[]
}
var tObject={};
(data['dataset']['data']).map((mkt, index) => {
tObject['date'] = mkt[0];
tObject['spx'] = mkt[1];
tObject['rate'] = mkt[5];
datamodel['mkt'].push(JSON.parse(JSON.stringify(tObject)))
})
console.log(datamodel['mkt'].length)
data is the JSON data which I got after hitting your API. I hope it helps.

Accessing JSON Content in Javascript (NodeJS)

im working with nodejs an need to get a string value from a json.
The json looks like this:
`result["DIDL-Lite"]["item"] = [ { '$': { id: '0/Spotify/Track', parentID: '0/Spotify', restricted: '0' },
'upnp:class': [ 'object.item.audioItem.musicTrack' ],
'raumfeld:section': [ 'Spotify' ],
'dc:title': [ 'Californication' ],
'upnp:artist': [ 'Red Hot Chili Peppers' ],
'upnp:album': [ 'Californication (Deluxe Version)' ],
'upnp:albumArtURI': [ [Object] ] } ]`
how can i access the dc:title (or any other) value?
I'm trying different ways, e.g. console.log(result["DIDL-Lite"]["item"]["dc:title"]);, but I simply can't get it work...
Any tips? Thank you in adavance!!

how to convert json data into a list of values (for linechart)

i have json data in following format.
{
"2" : {
"question" : "How did you like our Food?",
"avg_rating" : {
"2016-05-23" : 3.7142857142857,
"2016-05-25" : 4.5
}
},
"3" : {
"question" : "How did you like our drinks?",
"avg_rating" : {
"2016-05-23" : 3.4285714285714,
"2016-05-25" : 4
}
}
}
i want it to be formatted in following format where above data should be inside data variable of plot object.
var plot = [{
label: "",
data: [
[2016-05-23, 3.7142857142857],[2016-05-25, 4.5]
],
points: {fillColor: '#006699'}
},{
label: "",
data: [
[2016-05-23, 3.4285714285714],[2016-05-25, 4]
],
points: {fillColor: '#009933'}
}];
i am not good in english so i may not have been able to explain this problem properly. please help me to sort out this problem.

jqPlot Pie chart not rendering correctly

I am using jqPlot in phonegap but some problem is there like if I gave static value to pie chart then it works well but if I gave dynamic value then not rendering correctly
Static chart :-
$.jqplot('chartdiv', [ [ [ 'Cricket', 42],
[ 'Football', 8 ],
[ 'Basketball', 4 ], [ 'Chess', 28 ],
[ ' TableTennis', 18 ] ] ], {
seriesDefaults : {
renderer : $.jqplot.PieRenderer,
rendererOptions : {
showDataLabels : true
}
},
legend : {
show : true,
location : 'e'
}
});
O/P :-
Dynamic chart :-
var cricketPortion = document.getElementById("value_1").value;
var footballPortion = document.getElementById("value_2").value;
var basketballPortion = document.getElementById("value_3").value;
var chessPortion = document.getElementById("value_4").value;
var ttPortion = document.getElementById("value_5").value;
$.jqplot('chartdiv', [ [ [ 'Cricket', cricketPortion ],
[ 'Football', footballPortion ],
[ 'Basketball', basketballPortion ], [ 'Chess', chessPortion ],
[ ' TableTennis', ttPortion ] ] ], {
seriesDefaults : {
renderer : $.jqplot.PieRenderer,
rendererOptions : {
showDataLabels : true
}
},
legend : {
show : true,
location : 'e'
}
});
O/P :-
Tell me how can I get rid of this..??

Try with this you will get result
Use parseInt for every value
parseInt(document.getElementById("value_1").value)
DEMO

Use the parseInt function of Javascript to parse the String values into Integers Eg: parseInt(document.getElementById("value_1").value)
jqPlot excepts an value(integer) to plot the sections/divisions on the canvas(be it a pie-chart, bar-chart or any other chart)
So its [ label(a String), value(an Integer) ]
Make sure the data-type of the second field is of Integer type
Hope it helps.