(ファイル)

Description

Using files with Archetype field

Download URL for files for ATFile content

Append @@download view to URL.

Checking whether a File field has uploaded content

Calling AT File field accessor will return a File object:

(Pdb) self.context.getAttachment()
<File at /mfabrik/success-stories/case-studies/finnish-national-broadcasting-company/attachment>

Note that this may return None if the content item has been constructed, but the form has not been properly saved.

If size is 0 file is not yet uploaded:

(Pdb) attach.getSize()
0

Example how to check in a view whether AT context file size exists:

@property
def available(self):

    # Make sure that we have content item of right kind
    if ICaseStudy.providedBy(self.context):

        # Make sure the content item is not anymore in the creation stage
        if self.context.getAttachment() is not None:

            # Check the content of File field
            if self.context.getAttachment().getSize() > 0:
                return True

    return False