Can not display nodes after setting their location

GoJS
1

I have set X,Y position for a node which is on some link,
After saved chart I’m sure the data has been saved into database, also have a data Binding of Node.location
But after called diagram.rebuildParts(),
chart nodes do not displayed on the given X,Y position. Need help.

2

If those nodes are label nodes, in that they are each owned by a Link and Node | GoJS API is true, then you need to set or bind not the Node.location, but one or more of the link label properties described at GoJS Link Labels -- Northwoods Software

3

Thanks a lot, that’s what i need.