How to stop calling domToMutation indefinitely on dragging connected block

[Harsh Chaturvedi]

Hi,

I have a block with mutation, in my domToMutation handler I'm calling an API to load new field values, this works as expected. The same handler (domToMutation) is called once when the block is dragged on the canvass.

ref - SetValue_Drag_DomToMutation 

However, if two of the same blocks are attached together, the domToMutation is called indefinitely on the drag action for both the blocks.

How can I ensure that the domToMutation handler is called only once during the drag action (or that the domToMutation is only called once the drag ends).

TIA,

Harsh

[Neil Fraser]

Really good catch.  That's definitely a bug on our end.  Filed here: https://github.com/google/blockly/issues/6839

[Neil Fraser]

Of course us simply acknowledging that it's our bug doesn't help you in the mean time.  Sorry about that.

All you need to do to resolve the issue on your end is to add this line to the top of your domToMutation function:

  if (this.isInsertionMarker()) return;

[Harsh Chaturvedi]

Thanks Neil.

I tried the work around and it works.