Custom nodes in hypershade - problem with graphing network

[user_deleted]

Hello
I've implemented several nodes to be used as shading nodes. 

The problem is, when I click "Graph materials on selected nodes" or "Input and output connections" in hypershade, the graph is expanded just up to my nodes, and hides every other node upstream to mine.

I have to select all the nodes and click "Input and output connections" again and again, until complete network is drawn.

Here is how I register the nodes (Python API):

mplugin.registerNode( shader, OpenMaya.MTypeId(nodeIDs[shader]), lambda: OpenMayaMPx.asMPxPtr( shaderClass() ), template_Initializer(shaderClass), OpenMayaMPx.MPxNode.kDependNode, "shader/surface" )

or:

mplugin.registerNode( shader, OpenMaya.MTypeId(nodeIDs[shader]), lambda: OpenMayaMPx.asMPxPtr( shaderClass() ), template_Initializer(shaderClass), OpenMayaMPx.MPxNode.kDependNode, "utility/color" )

I also register drag'n'drop behaviours, which work fine.

The nodes do not have any compute(), they're just dummy placeholders for attributes.

thanks

[user_deleted]

Solved.
Node's attributes must be properly setuo with attributeAffects() function.