The following snippet demonstrates a use case for leveraging the attachment CRDT, as well as the step-by-step process for creating and fetching the attachment:
If developing in Swift, for a tutorial on how to work with an attachment in a chat app, see Attachments: Chat App.
val testContext = InstrumentationRegistry.getInstrumentation().context val attachmentStream = testContext.assets.open("attachment_test.png") val bitmapStream = testContext.assets.open("attachment_test.png") val attachmentBitmap = BitmapFactory.decodeStream(bitmapStream) bitmapStream.close() val metadata = mapOf("name" to "my_image.png") val attachment = coll.newAttachment(attachmentStream, metadata) val docId = coll.upsert(mapOf("some" to "string", "my_attachment" to attachment)) val doc = coll.findById(docId).exec() val attachmentToken = doc!!["my_attachment"].attachmentToken val fetcher = coll.fetchAttachment(attachmentToken!!) { when (it) { is Completed -> { val attBitmap: Bitmap = BitmapFactory.decodeStream(it.attachment.getInputStream()) } is Progress -> {} } }

