How to use a doc field to search another doc?

Elastic Stack Elasticsearch
1

customer doc

{
	"id": "123",
	"name": "alibaba",
	"sellerId": "111"
}

workflow doc

{
	"id": "100",
	"title": "hello",
	"customerId": "123"
}

I want to search workflow documents with sallerId, it look like

{
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "sellerId": {
              "value": "111"
            }
          }
        }
      ]
    }
  }
}

I can't use parent-child, because customer is not really a parent of workflow, some workflow doc dosen't has customer infomation. How could i use customer.sellerId to search workflow doc.

2

What's the relationship between sellerId and customerId,?

3

workflow doc may has customerId, and customer doc must has sellerId, Seller can search its own workflow doc.
I know which customer doc belongs to the seller, but I don't know which workflow doc belongs to the seller.
The customerId in workflow doc is the id of customer doc, and customer doc has sellerId.

4

That is a join, which Elasticsearch does not support. I would recommend denormalizing by storing the seller is on the workflow.

5

Yes, that is my final way. It's hard to maintain sellerId on workflow in my project.