Relationship CSV Export Implementation

A Payload user wants to have a single view in Payload which can allow querying and exporting from two collections at once:

1. Requests
2. Request Lines

A Request can have many request lines.

Here are some example queries that the Payload user may want to perform, against Request Lines:

• Give me all the request lines that somebody submitted (request.requestedBy)
• Give me all the request lines by request ID (request)
• Give me all request lines where request total is less than 1000 (where request.total less_than 1000)

The goal is to produce a CSV export that is highly legible, which looks something like this:

Request ID	Request Total	Requested By	Line Item Title	Line Item Description description	Line Number	Line Item Cost
13	3000	Sean	MacBook Pro - 14	MacBook Pro	14	1000
13	3000	Sean	Plant - 14	Plant	14	1000
13	3000	Sean	Plant - 14	Plant	14	1000

Required, missing functionality

• Can the Admin UI build filters based on nested relationship properties?
  • Should we "white-label" which nested properties we want to expose via UI? It would be bad to expose all of them...
  • We should ideally eliminate virtual fields from the UI filter...
  • We should also disable sorting on virtual fields...