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

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:

Code:

---


{ "_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

Code:

---

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

---

using the @Query annotation.

Here is my actual custom query in my repository interface

Code:

---

@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

Update:

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

Thank You,
Deep

Quote:

---

Originally Posted by deepdmistry

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:

Code:

---


{ "_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

Code:

---

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

---

using the @Query annotation.

Here is my actual custom query in my repository interface

Code:

---

@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

---