Applying filters in MongoDb
I need to apply filters in mongoDb in an embedded document so how can I make a query like
Example:
var query = {
_id:userId,
'match.Id':matchId,
'match.userId':userId1
}
now I want to apply filters lets suppose
case 1: my query should be like
var query = {
_id:userId,
'match.Id':matchId,
}
case 2 :
var query = {
_id:userId,
'match.userId':userId1
}
there can be many cases like this
So my question is how can I make this query object in node.js/javascript
My work : I can create multiple key in an object but creating key as below doesn't works
var query={}
query._id:userId // works
query.'match.userId':matchId // error
query.match.userId:matchId //error
tried below code got desired output but it comes with square bracket but type of arr is object
var arr = [];
arr[ 'key3.abc' ] = "value3";
arr[ 'key2.abc' ] = "value3";
console.log(arr)//[ 'key3.abc': 'value3', 'key2.abc': 'value3' ]
desired output:
{'key3.abc': 'value3', 'key2.abc': 'value3'}
Change []
to {}
var obj = {};
obj[ 'key3.abc' ] = "value3";
obj[ 'key2.abc' ] = "value3";
console.log(obj) // { 'key3.abc': 'value3', 'key2.abc': 'value3'}
NB We can assign or access a JavaScript object by square ( []
) notation when key contains special character
eg space, dot etc.
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