Mongo db query for multiple conditions - mongodb

Question

I have a Mongodb Json which look like this
{
"_id" : "5b862ebecebe455a1744",
"userId" : "111",
"courses" : [
{
"stateName" : "statge 1",
"courseId" : "1453",
"courseName" : "Program Training 1",
"duration" : 1,
"lag" : 0,
"courseType" : "1",
"transitionType" : "onComplete",
"scheduledStartDate" : ISODate("2018-07-27T16:23:14.000+05:30"),
"scheduledEndDate" : ISODate("2018-07-27T16:23:14.000+05:30"),
"courseProgress" : 0,
"ASD" : ISODate("2018-09-17T23:18:30.636+05:30"),
"score" : 0
},
{
"stateName" : "stage 2",
"courseId" : "1454",
"courseName" : "Program Assessment 1",
"duration" : 1,
"lag" : 0,
"courseType" : "2",
"transitionType" : "onComplete",
"scheduledStartDate" : ISODate("2018-07-28T16:23:14.000+05:30"),
"scheduledEndDate" : ISODate("2018-07-28T16:23:14.000+05:30"),
"courseProgress" : 0,
"score" : 0
},
{
"stateName" : "stage 3",
"courseId" : "911",
"courseName" : "Program Training 3",
"duration" : 1,
"lag" : 0,
"courseType" : "1",
"transitionType" : "onComplete",
"scheduledStartDate" : ISODate("2018-07-29T16:23:14.000+05:30"),
"scheduledEndDate" : ISODate("2018-07-29T16:23:14.000+05:30"),
"courseProgress" : 0,
"score" : 0
}
],
"userStatus" : 1,
"modified" : ISODate("2018-09-12T11:49:47.400+05:30"),
"created" : ISODate("2018-09-12T11:49:47.400+05:30"),
"completionStatus" : "IP",
"currentState" : {
"courseProgress" : 0,
"stateName" : "statge 1",
"courseId" : "1453",
"courseName" : "Program Training 1"
}
}
I want to find a query where condition is. Please help, as I am new to mongodb
courses.transitionType = oncomplete
(PROGRESS<100||(PROGRESS==100&&ASD exists false))
And print Result something like this which contain these below data
{
"_id" : "5b862ebecebe455a1744",
"courseData" : {
"userId" : "4688",
"courseId" : "1476",
"courseProgress" : 0
}
}

Answer 1

You will have to use an aggregation with a $match stage and a $project to format your result.
The tricky part of your request is that you want an answer by course, but 1 item of your collection contains many courses. So first, you can use the $unwind stage to separate every course
db.[CollectionName].aggregate([
{
$unwind : '$courses'
}
{
$match: {
'courses.transitionType': 'onComplete',
$or: [
{
'courses.courseProgress': { $lt: 100 }
},
{
'courses.courseProgress': 100,
ASD: { $exists: 0 }
}
]
}
},
{
$project: {
_id: '0',
courseData: {
userId: '$courses.userId',
courseId: '$courses.courseId',
courseProgress: '$courses.courseProgress'
}
}