func Delete(rw http.ResponseWriter, req *http.Request, r render.Render, params martini.Params) {
ctx := appengine.NewContext(req)
b := banner.Banner{}
intID, err := strconv.Atoi(params["id"])
if err == nil {
b.ID = int64(intID)
}
if err := b.Get(ctx); err != nil {
http.Error(rw, "failed to delete banner", http.StatusInternalServerError)
return
}
segs := strings.Split(b.Image, "/")
blobstore.Delete(ctx, appengine.BlobKey(segs[len(segs)-1]))
if err := b.Delete(ctx); err != nil {
http.Error(rw, "failed to delete banner", http.StatusInternalServerError)
return
}
r.Status(200)
return
}
