De/serialization via Gryo loses properties of cardinality `set`

[lennart...@googlemail.com]

Hi,

i am not sure whether this is a bug or whether i am missing an opportunity to configure something differently.

This happens in Java, but for testing i've written this short script in Jython which reproduces the problem.

The property `foo` is set multiples times with cardinality `set`. When writing/reading to/from Kryo one property value gets lost:

database_path = 'test.kryo'

graph_orginal = TinkerGraph.open()

vertex_orginial = graph_orginal.addVertex()
vertex_orginial.property(Cardinality.set, u'foo', u'Bar')
vertex_orginial.property(Cardinality.set, u'foo', u'Baz')

graph_orginal.io(IoCore.gryo()).writeGraph(database_path)


graph_loaded = TinkerGraph.open()
graph_loaded.io(IoCore.gryo()).readGraph(database_path)

print 'Original:'

for vp in vertex_orginial.properties():
    print vp

print 'Loaded:'

for vertex_loaded in graph_loaded.vertices():
    for vp in vertex_loaded.properties():
        print vp

This script gives:

Original

vp[foo->Bar]

vp[foo->Baz]

Loaded

vp[foo->Baz]

I guess that the properties are read with cardinality `single`.

Any thoughts?

Cheers

Lennart

[Robert Dale]

Maybe this will help:

http://tinkerpop.apache.org/docs/current/reference/#_configuration_3

It is important to consider the data being imported to TinkerGraph with respect to defaultVertexPropertyCardinalitysetting. For example, if a .gryo file is known to contain multi-property data, be sure to set the default cardinality to list or else the data will import as single. Consider the following:

Robert Dale

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[lennart...@googlemail.com]

Hi Robert,

thank you, that helped.

Robert Dale

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