Unable to update image Summary using AtomPub

[tarmes]

If I GET an image's metadata the summary node contains the image caption.

When PUTing this data I can successfully change a number of fields (title, description (content), etc) but the summary does not change.

Just to remind myself when I look at this again, the <summary> element is populated from the caption field for the media file in WP.

Added attachment to look for the media description field in the AtomPub summary field instead of the content field. This fixes the problem of being able to update the description field but still feels a bit odd.

I guess technically it's correct though since the spec says the content field MUST be empty when there's a src attribute value.

(In [10751]) Attachment metadata is stored in the summary field in AtomPub requests. Fixes #9148 props josephscott.

For 2.7 branch

(In [10752]) Attachment metadata is stored in the summary field in AtomPub requests. Fixes #9148 for 2.7.2 props josephscott.

For future reference, the spec details reference is:

 http://www.atompub.org/rfc4287.html#element.content

Basically, if you have a SRC attribute, then the content must be empty.