$elemMatch equivalent in spring data mongodb - mongodb

Question

I need to know the equivalent code in spring data mongo db to the code below:-
db.inventory.find( {
qty: { $all: [
{ "$elemMatch" : { size: "M", num: { $gt: 50} } },
{ "$elemMatch" : { num : 100, color: "green" } }
] }
} )

Answer 1

I am able to get the answer. This can be done in Spring data mongodb using following code
Query query = new Query();
query.addCriteria(Criteria.where("qty").elemMatch(Criteria.where("size").is("M").and("num").gt(50).elemMatch(Criteria.where("num").is(100).and("color").is("green"))));

Answer 2

I think query in your answer generated below query
{ "qty" : { "$elemMatch" : { "num" : 100 , "color" : "green"}}}
I think thats not you need.
Its only check last elemMatch expression not all.
Try with this.
query = new Query();
Criteria first = Criteria.where("qty").elemMatch(Criteria.where("size").is("M").and("num").gt(50));
Criteria two = Criteria.where("qty").elemMatch(Criteria.where("num").is(100).and("color").is("green"));
query.addCriteria(new Criteria().andOperator(first, two));

Answer 3

Just implemented $all with $elemMatch with spring data Criteria API:
var elemMatch1 = new Criteria()
.elemMatch(Criteria.where("size").is("M").and("num").gt(50));
var elemMatch2 = new Criteria()
.elemMatch(Criteria.where("num").is(100).and("color").is("green"));
var criteria = Criteria.where("qty")
.all(elemMatch1.getCriteriaObject(), elemMatch2.getCriteriaObject());
mongoTemplate.find(Query.query(criteria), Inventory.class);
Note: important part is calling getCriteriaObject method inside Criteria.all(...) for each Criteria.elemMatch(...) element.

Answer 4

Just to make #Vaibhav answer a bit more clearer.
given Document in DB
{
"modified": true,
"items": [
{
"modified": true,
"created": false
},
{
"modified": false,
"created": false
},
{
"modified": true,
"created": true
}
]
}
You could do following Query if you need items where both attribute of an item are true.
Query query = new Query();
query.addCriteria(Criteria.where("modified").is(true));
query.addCriteria(Criteria.where("items")
.elemMatch(Criteria.where("modified").is(true)
.and("created").is(true)));
here an example how to query with OR in elemMatch
Query query = new Query();
query.addCriteria(Criteria.where("modified").is(true));
query.addCriteria(Criteria.where("items")
.elemMatch(new Criteria().orOperator(
Criteria.where("modified").is(true),
Criteria.where("created").is(true))));

Answer 5

Hi i implemented too in Kotlin, its is extended about if statements to create dynamic query :)
val map = segmentFilter.segmentValueMap.map {
val segmentCriteria = where("segment").isEqualTo(it.key)
if (it.value.isNotEmpty()) {
segmentCriteria.and("segmentValue").`in`(it.value)
}
if (sovOverviewInDateRange != null) {
segmentCriteria.and("date").lte(sovOverviewInDateRange.recent).gte(sovOverviewInDateRange.older)
}
Criteria().elemMatch(segmentCriteria)
}
criteriaQuery.and("sovOverview").all(map.map { it.criteriaObject })
sovOverviews: {
$all: [
{
$elemMatch: {
segment: "Velikost",
segmentValue: "S"
}
},
{
$elemMatch: {
segment: "Kategorie"
}
}
]
}