That error means the eventInfo object contains objects that can’t be converted to JSON.
Your code looks as though it should work. But you haven’t pasted in the exact source code (there’s an @ missing on the first line) so you may have omitted some significant clue. Could you paste in the exact source code that fails?
Also, if you set a breakpoint at the -putProperties: call you can examine the value of eventInfo and double-check that it’s what you expect.
Ah, that explains it. You should use a standardized format for storing dates, though, if you care about interoperability. (Also, I believe the default string representation of an NSDate may reflect the current locale, meaning that it will differ depending on what country the user is in or what system calendar prefs they set.)
We have a method [CBLJSON jsonObjectWithDate:] that converts an NSDate to an NSString in ISO-8601 format, which is the de facto standard for storing dates in JSON.
This is great! Let me look at CBLJSON.h to familiarize myself.
On a side note, if I allow “[database createDocument]” to generate the UUID as document ID, how can I retrieve the document ID to use for editing the document later? Is there a special field which I can retrieve the document ID?