Cannot sendMail with attachments

[ConradIrwin]

Currently the way that SendMail is defined, it is not obvious how to send a message with attachments.

Message is defined with Attachments: []Attachment; but when you pass an Attachment object to the API, you must provide either a FileAttachment or an ItemAttachment. In my case I wanted to provide a FileAttachment, which requires setting the ContentBytes field, which is not present on the Attachment struct.

I realize this is somewhat of a problem with representing the graph data-types (which make use of subclassing) in Go (which doesn't); and wondered if you'd given this some thought already – it's definitely not clear what the right solution is. Maybe an AddFileAttachment(file *FileAttachment) method on SendMailRequestBuilder?

[blaskovicz]

I hit this problem, except in the reverse order. When I am attempting to read the content of an attachment for a message, I'm seeing contentBytes in the underlying interface via dump(attachment) but there is no ContentBytes field on said struct.

@ConradIrwin after messing around I finally realized that the Object struct has an AdditionalData map[string]interface{} that contains all the extra fields not present in the leaf structs. For example, I was able to access attachedFile.AdditionalData["contentBytes"] to read - perhaps you can use it for write as well?