the argument to getVertexByKey is the property name on which the index is
created, not the name of the index itself.
check the javadocs:
Parameters:
iKey - Name of the indexed property
so like i said, if you want the Method 3 to work (assuming the property
name on Entity class is Id, against which you have created an index with
name Entity.Id) you need to pass the argument as Id, not Entity.Id.
~nagu.
On Monday, July 27, 2015 at 11:34:43 AM UTC+5:30, Parthasarathy
Suryanarayanan wrote:
>
> It is a composite index (with the name "Entity.Id") of properties (key1,
> key2, key3, key4) on the class "Entity".
>
> To be clear:
> Method 1: select from index:Entity.id where key = [1224736769, 2, 14, 22]
> Method 2:
> for (Vertex entity : graph.getVertices("Entity", new String[] { "key1",
> "key2", "key3",
> "key4" }, new Object[] { key1_val, key2_val, key3_val, key4_val
> })) {
> return (OrientVertex) entity;
> //there really shouldn't be more than one as this is a unique index
> but this seems like a hack
> }
> Method 3: Vertex exists = graph.getVertexByKey("Entity.Id", new
> Object[]{key1_val, key2_val, key3_val, key4_val});
>
> Method 1, Method 2 works. But not Method 3 (which I want to work)
>
> On Sunday, July 26, 2015 at 5:58:38 PM UTC-4, nagaraja sosale ramaswamy
> wrote:
>>
>> you probably meant to write:
>>
>> Vertex exists = graph.getVertexByKey("Id", new Object[]{key1, key2, key3,
>> key4});
>>
>> (assuming the property name on Entity Vertex is Id)
>>
>>
>>
>> On Monday, July 27, 2015 at 12:30:06 AM UTC+5:30, Parthasarathy
>> Suryanarayanan wrote:
>>>
>>> After adding many instances of OrientVertex, I created a composite index
>>> using some of the properties like the following
>>> <MY_OClass>.createIndex("Entity.Id", "UNIQUE", new String[]{key1,
>>> key2, key3, key4});
>>> ..where the key1..4 are of INTEGER type (not sure if this the right way
>>> to create the composite key).
>>> Now I am trying to verify if the entity exists before trying to add one,
>>> like the following
>>> Vertex exists = graph.getVertexByKey("Entity.Id", new Object[]{key1,
>>> key2, key3, key4});
>>>
>>> But the value of the exists is always null. Note that I could always
>>> query in the console
>>> select from index:Entity.id where key = [1224736769, 2, 14, 22]
>>> and get the appropriate entity back. I just want to be sticking to the
>>> graph API in my java code.
>>>
>>> What am I doing wrong? Thanks for your help.
>>>
>>>
>>>
--
---
You received this message because you are subscribed to the Google Groups
"OrientDB" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
