How can I define structure of local IDs?

How could I add prefix or postfix on local ID which was generated automatically before being sent to sync server?

In my case:

1. every one would register an account on our server, and the identification, with a unique account ID, would be saved in local database after first signing in;
2. client data would be saved separately into their local database firstly. In my mind, I thought that local IDs would be generated locally and WatermelonDB would try to keep it to be unique locally, right? That means it might not be unique on the remote server.
3. I would like to prefix or postfix the identification ID to each local ID before sending them to the remote server to avoid the not-unique-remotely issue, and it also could be used for sharding easily on the remote database.

pseudo-code for transforming local ID:

global.identification = {
    id: 12345,
    name: 'myFirstPet'
};
function transformId(item: Model) {
    return global.identification.id + '-' + item._raw_id;
}

But I did not find any comment about postfixing or prefixing on local ID, could you please help me to resolve it?

[radex]

@netbull this was discussed in other issues already. Getting a conflict on a random ID is very, very unlikely. You can absolutely do sync-time ID remapping, but it’s a huge pain in the butt when you have relations between objects.

Hint: you can add this to the documentation somewhere that if the sync pull response returns data with IDs which are integers WatermelonDB uses the random generator, but if they are strings it’s OK.

Indeed, you can add this 😃 You can send a quick PR to the docs from the browser: https://github.com/Nozbe/WatermelonDB/blob/master/docs-master/Advanced/Sync.md

[stale[bot]]

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