error related to photo upload

[yedpodtrzitko]

There has to be either pre-upload check of mandatory fields or upload error should be more verbose:

example: 1) open new article form 2) open add photo modal 3) choose some file to upload 4) wait until thumbnail appears 5) press upload button 6) see error Stop! Something went wrong

observing the request in firebug revealed this error message" The 'authors' field has no data and doesn't allow a null value.

expected behaviour:

• pre-check mandatory field before upload process

or (less preferable solution)

• show what was really wrong let user can fix it