Arbitrary JOIN with include

I would like to give an expression like this

documentModel.hasOne(documentModel,
{
    as: "user",
    foreignKey: "(\"user\".\"data\"#>>\'{author}\')::uuid" 
               //("user"."data"#>>'{author}')::uuid
}

The models are different kind of records but belongs to the same table (document). This table has the column “data” (type = JSONB) and the column “id” (type = uuid)

Generated join part

LEFT OUTER JOIN "document" AS "user" ON "document"."id" = "user"."(user.data#>>'{author}'):uuid" AND "user"."deletedAt" IS NULL

Expected join part

LEFT OUTER JOIN "document" AS "user" ON "document"."id" = ("user"."data"#>>'{author}')::uuid AND "user"."deletedAt" IS NULL

My idea is that we could use something like this

postModel.hasOne(userModel,
{
    as: "user",
    foreignKey: {
        literal: "(\"user\".\"data\"#>>\'{author}\')::uuid"
    }
}

If you guys could guide me into the right files to change I would appreciate to try implementing this feature. I’m kind of new in this project and I can’t understand the source code well.

Thanks !

[felixfbecker]

It would probably be of benefit to not join just a table, but an arbitrary model (document) so you get actual instances. What do you think about this:

find({ include: [ { model: Document, as: 'user', on: literal('...') } ] })

where Document is not associated, but the JOIN still works as long as you provide on and as

[felixfbecker]

No, you can use literal. But I think we have a syntax for accessing JSON properties. We need an API proposal because software needs to be designed before it can be written 😄 I can tell you that I won’t have the time for this feature. Who ever needs it can pick it up and implement the syntax we agreed on. I also am the wrong person to ask about where in the code this needs to be implemented.