Spring Data MongoDB: Querying for size of an array of embedded documents

[deepdmistry]

Hello,

Using Spring Data MongoDB version : 1.0.2.RELEASE and Spring Data Framework : 3.1.1.RELEASE
I am trying to query for size of an array of embedded documents. I basically have a tree structure with references to parents and children documents.

an example document would be:

{ "_id" : ObjectId("50099513b760e35d421bab44"), "_class" : "com.example.ExampleClass", "name" : "test1", "parents" : [ ], "children" : [ 	{
		"$ref" : "ExampleClass",
		"$id" : ObjectId("50099516b760e35d421bab45")
	}, 	{
		"$ref" : "ExampleClass",
		"$id" : ObjectId("50099516b760e35d421bab47")
	} ] }

I am trying to do the following query

db.coll.find({parents : {$size : 0}})

using the @Query annotation.

Here is my actual custom query in my repository interface

@Query(" { parents : { $size : 0 } }")
List<ExampleClass> getAllTopLevelComponents();

However for no apparent reason, the thread terminates without any exception being thrown.

Anyone have any ideas what might be causing this ?

Thanks,
Deep

[deepdmistry]

Update:

I realized that none of my @Query methods work with embedded documents. Any pointers on this would be appreciated.

Thank You,
Deep

Hello,

I am trying to query for size of an array of embedded documents. I basically have a tree structure with references to parents and children documents.

an example document would be:

{ "_id" : ObjectId("50099513b760e35d421bab44"), "_class" : "com.example.ExampleClass", "name" : "test1", "parents" : [ ], "children" : [ 	{
		"$ref" : "ExampleClass",
		"$id" : ObjectId("50099516b760e35d421bab45")
	}, 	{
		"$ref" : "ExampleClass",
		"$id" : ObjectId("50099516b760e35d421bab47")
	} ] }

I am trying to do the following query

db.coll.find({parents : {$size : 0}})

using the @Query annotation.

Here is my actual custom query in my repository interface

@Query(" { parents : { $size : 0 } }")
List<ExampleClass> getAllTopLevelComponents();

However for no apparent reason, the thread terminates without any exception being thrown.

Anyone have any ideas what might be causing this ?

Thanks,
Deep