Mark documents as external in destination database when using ETL

[marcuslindblom]

We can't use document id postfix because we have references in the documents being transfered using ETL.
I was thinking about something like this.

loadToCollection({
    '@metadata': {
        '@external': true
    }
})

This works, but I want to add the metadata only and keep all other fields. Is this possible?

[arekpalinski]

You can use the following ETL script:

this['@metadata']["external"] = true;

loadToCollection(this);

Please not that I didn't use @external: true but external: true. The reason is that:

Keys in the metadata that starting with @ are reserved for RavenDB use

https://ravendb.net/docs/article-page/6.0/csharp/client-api/session/how-to/get-and-modify-entity-metadata#modify-the-metadata