nested json by underscore.js

Question

i have found these related posts but not able to solve my issue

Underscore, Nested Group By and Generate a JSON

Grouping a nested array with underscore.js

I want to group like following :

like StartDate ---> FunctionID--> STartTime

this is my query result

and json result is like following :

[{"Act_Qty":0,"FunctionID":268,"ResDesc":"Anniversary Party","StartTime_EndTime":"04:00:00 AM - 04:30:00 AM"},
[{"Act_Qty":0,"FunctionID":268,"ResDesc":"Anniversary Party","StartTime_EndTime":"04:00:00 AM - 04:30:00 AM"}]

for nested json grouping I Tried following different queries :

var result = _.chain(jsonData)
.groupBy('StartDate')
.mapObject( StartDate => _.groupBy(StartDate, 'FunctionID'))
.value();


var result = _.chain(jsonData)
.groupBy('FunctionID')
.mapObject( FunctionID => _.groupBy(FunctionID,'StartDate' ))
.value();

but this is giving me results like

and

like same functions in inner group ,But i want different functions in inner group

please suggest

Answer 1

This is how you can nested group data.

 data = [{ "StartDate": "2018-09-11", "FunctionID": "276", "StartTime_EndTime": "08:00:00 AM - 11:00:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "13", "Expr": "12", "Act_Qty": "13", "Charge": "19", "Item": "Tea Sandwitches and Salads" }, { "StartDate": "2018-09-11", "FunctionID": "276", "StartTime_EndTime": "08:00:00 AM - 11:00:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "13", "Expr": "12", "Act_Qty": "13", "Charge": "18", "Item": "Pasta Station" }, { "StartDate": "2018-09-12", "FunctionID": "295", "StartTime_EndTime": "07:00:00 AM - 07:30:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "13", "Expr": "12", "Act_Qty": "13", "Charge": "1", "Item": "Tea Sandwitches and Salads" }, { "StartDate": "2018-09-12", "FunctionID": "295", "StartTime_EndTime": "07:00:00 AM - 07:30:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "26", "Expr": "18", "Act_Qty": "19", "Charge": "9", "Item": "Coffee" }, { "StartDate": "2018-09-13", "FunctionID": "298", "StartTime_EndTime": "09:00:00 AM - 11:00:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "13", "Expr": "12", "Act_Qty": "13", "Charge": "19", "Item": "Tea Sandwitches and Salads" }, { "StartDate": "2018-09-13", "FunctionID": "298", "StartTime_EndTime": "07:00:00 AM - 11:00:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "13", "Expr": "12", "Act_Qty": "13", "Charge": "18", "Item": "Pasta Station" }, { "StartDate": "2018-09-15", "FunctionID": "299", "StartTime_EndTime": "06:00:00 AM - 07:30:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "13", "Expr": "12", "Act_Qty": "13", "Charge": "1", "Item": "Tea Sandwitches and Salads" }, { "StartDate": "2018-09-16", "FunctionID": "299", "StartTime_EndTime": "06:30:00 AM - 07:30:00 AM", "ResDesc": "Breakfast", "functionRoom": "Living Room", "Gurenteed": "26", "Expr": "18", "Act_Qty": "19", "Charge": "9", "Item": "Coffee" }]; var byStartDate = _.groupBy(data, 'StartDate'); _.each(byStartDate, (d, i) => { byStartDate[i] = _.groupBy(d, 'FunctionID'); _.each(byStartDate[i], (d1, i1) => { byStartDate[i][i1] = _.groupBy(d1, d2 => { return d2["StartTime_EndTime"].split("-")[0].trim(); }); }); }); console.log(byStartDate);

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let me know if any concern.