How do I selectively delete only the parent among embedded objects?

[james-ep01]

Introduction

How can I selectively delete only the parent among embedded objects? Deleting the children above the parent works fine, but when I select the parent and delete it, the children are also deleted.
Question: When deleting a parent, I want to ask whether to delete only the parent or the children.

Thank you.

Steps to reproduce

No response

Restrictions & Constraints

No response

Does your question relate to JointJS or JointJS+. Select both if applicable.

JointJS, JointJS+

[zbynekstara]

Hi james-ep01,

If you need to delete only the parent without deleting the children, you need to change the parent of the embedded cells first. You have two options:

• currentParent.unembed(children) (https://docs.jointjs.com/api/dia/Cell/#unembed) - this unembeds the children and leaves them without a parent
• newParent.embed(children, { reparent: true}) (https://docs.jointjs.com/api/dia/Cell/#embed) - this embeds the children into another parent

[james-ep01]

Thank you for your answer.

I can unembed from the parent, but I don't know if the parent is embedded. Do I unconditionally unembed it? How can I unembed it if I don't know the embedded children?
If I want to provide information, I need to tell them that the object is embedded, and I need to find the embedded children and tell them to embed them from the parent. Then I can selectively delete them.
Since there is no way to get information, it takes at least 2-3 days to solve even a simple problem.

I searched and thought about this and that and solved it, but I don't want to attach the self-answer code.

[zbynekstara]

What you are describing sounds absolutely correct to me. You can get the array of embedded children via parent.getEmbeddedCells() (https://docs.jointjs.com/api/dia/Cell/#getembeddedcells) - if the length of this array is 0, it means that there are no embedded children. In either case, you can provide this array without modification to parent.unembed(children) and it will take care of unembedding the elements for you, if appropriate.

Thank you for sharing your experience - we are sorry to hear that resolving the issue has been so frustrating and time consuming for you. We appreciate your patience as you worked through the problem. Community support on GitHub is just one of the support channels we offer - if you would like more direct assistance, we do offer paid support subscription plans as well with faster, prioritized help for technical challenges like this.

[james-ep01]

I know that paid support subscription plans are not helpful to me, so I am developing it myself. In order to develop the platform I am developing, I will have to sit next to you guys and develop together for a short period of several months until the product development is finished.
Thank you for your reply.