#8 — ValueError when using Plone4 (Blobstorage) and collective.flowplayer 3.0rc2

I got a ValueError("Can't commit with opened blobs.") if I modify or delete a flashmovie in my Plone4 site.


I think it's a caching issue in events.py -> ChangeFileView -> file_handle. This method has property.Lazy descriptor
114 # For blobs
115 file_handle = file_object.getIterator()
116 except AttributeError:
117 file_handle = StringIO(str(file_object.data))
118 import pdb; pdb.set_trace( )
119 -> return file_handle
(Pdb) file_handle
<plone.app.blob.iterators.BlobStreamIterator object at 0x10d300ad0>

In case of using blobs file_handle returns a BlobStreamIterator.

I'm not really sure how to fix this issue, perhaps something like that.

file_handle = StringIO(file_object.getIterator().blob.read())

In my case in ends up in a warning for large files (8MB)

[warn] [/metadata/entry[1]] Error when getting size of 'item[8]': Field /metadata/entry[1]/item[8]/attr[]/key is too large!



For now I go back to 3.0rc1.