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Getting deleted DBRecord information from Datastore sync:

H. Yi-Shan

I'm developing an iOS app with Datastore.

How do I know records deleted from remote? I watch changes with observer (status.incoming) and call sync: and it return the changes. The deleted DBRecord will be return but the properties can't be accessed, which I use for storing a unique ID for my data, and compare them in my Core Data database.

(I don't use Datastore as my main database is because I also have an iCloud sync option. )

The only thing I can get from the deleted Record is isDeleted flag. There seems not much I can get with the sync: API. Right now I just have to make my own isDeleted flag in the DBRecord but not actually delete the record.

Is there better way to do it?

Thanks.

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Comments

Steve M.

There's no way from the iOS Datastore SDK to access the fields of deleted records after they've been deleted.

Why don't you just use the record ID as the unique ID? That seems like a more robust solution in general. (For example, you get the guarantee that you won't have two records with the same record ID.)

H. Yi-Shan

Thanks for the clarification.

I don't use record ID as unique ID because I have other sync options (iCloud).

Steve M.

I don't understand. Instead of putting the ID in another field, just make it the record ID.

E.g. instead of this:

<BR /> [myTable insert:@{ @"unique_id": @"abc123", @"foo": @"bar" }];<BR />

you can do this:

<BR /> [myTable getOrInsertRecord:@"abc123", fields: @{ @"foo": @"bar" }, ...]<BR />

H. Yi-Shan

Thank you. Now the problem solved.

I think I just missed this paragraph in tutorial:

"Each record has a string ID. An ID can be provided when a record is created, or one will be automatically generated and assigned if none is provided. Once a record is created, the ID cannot be changed."