Node and edge collapse do not work together

[ugurdogrusoz]

• Construct a graph with 2 compounds and 2 inter-graph edges between the same source-target in these compound nodes
• Collapse the inter-graph edges into a meta edge m1
• Now collapse one of the compound nodes (this will create a new meta edge m2 which represents m1)
• Expand the meta edge m2
  We get an exception.

When we do this in reverse order, collapse the compound first and then collapse inter-graph meta edges, we might have similar problems.

[canbax]

I also observed this. Probably the reason is when a compound node is collapsed, its children are removed from cy.

When we expand a meta edge, source or target of an edge might be inside a compound node. In this case, since source or target of an edge won't be found, cytoscape.js gives an error.

below are my error logs.

core.js:6228 ERROR Error: Can not create edge e1630253 with nonexistant source n1
at error (cytoscape.cjs.js:828)
at Collection.push../node_modules/cytoscape/dist/cytoscape.cjs.js.elesfn$u.restore (cytoscape.cjs.js:12962)
at Core.add (cytoscape.cjs.js:13356)
at Object.expandEdge (expandCollapseUtilities.js:782)
at index.js:248
at Element.forEach (cytoscape.cjs.js:11196)
at Object.api.expandEdges (index.js:247)

[gabrywu]

any updates?

[canbax]

any updates?

It is about user behavior. You should not let the user expand such an edge.