Hello, everybody. I found a very strange behaviour while creating a bpmn model.
I’ll give you some repro-steps:
- I create a new bpmn diagram
- From the start event, I create a new task
- Starting from the task, I create a end event
- I try to drag the task and drop a bit to the left (closer to the start event) or a bit to the right (closer to the end event)
- Everthing gets updated, but the diagram create a new connection from the task to the task itself.
I thought it was because I was using the 2.5.2 version of bpmn.js, so I decided to move to 3.0.4 (which I saw in changelog.md that uses diagram.js 3.0.4). But it doesn’t change:
Here, I uploaded a small video out of it: https://giant.gfycat.com/InsignificantMeaslyGlobefish.webm
Here’s an image of what the result is:
With that arrow behind the group that I can’t move away, no matter what. And my XML becomes like this:
<bpmn2:process id="Process_1" isExecutable="false"> <bpmn2:startEvent id="Start"> <bpmn2:outgoing>start-task</bpmn2:outgoing> </bpmn2:startEvent> <bpmn2:task id="Task"> <bpmn2:incoming>start-task</bpmn2:incoming> <bpmn2:incoming>SequenceFlow_08vn6wv</bpmn2:incoming> <bpmn2:outgoing>SequenceFlow_08vn6wv</bpmn2:outgoing> <bpmn2:outgoing>task-end</bpmn2:outgoing> </bpmn2:task> <bpmn2:sequenceFlow id="start-task" sourceRef="Start" targetRef="Task" /> <bpmn2:endEvent id="End"> <bpmn2:incoming>task-end</bpmn2:incoming> </bpmn2:endEvent> <bpmn2:sequenceFlow id="SequenceFlow_08vn6wv" sourceRef="Task" targetRef="Task" /> <bpmn2:sequenceFlow id="task-end" sourceRef="Task" targetRef="End" /> </bpmn2:process>
The SequenceFlow_08vn6wv is the one automatically generated.
I’m using the modeler inside an Angular Module. Because of this, I’m not capable to replicate the code to any JSFiddle, nor StackBlitz (BpmnJs has no typings.d.ts file, therefore I can’t create an implicit connection between the app.component.ts and the node_modules folder containing the bpmn-js files. But I’ll try to create a GitHub repo later or in the next days.
Try to debug the code, I noticed something particular: looks like the drag’n’drop of the element trigger the event element.move. This one somehow calls the method insertShape giving instruction to create a new connection that happen to have the task as source and as target. This is something that I can’t catch adding a custom rule, since gets created programmatically.
I know this is complicated to understand. And because of this any kind of help is more than appreciated, the same for request of clarification. Meanwhile I hope that someone had cross path with a problem like this one, and can suggest me something (anything, please, anything).
Meanwhile, I wish you all happy Christmas and New Year’s Eve holidays.