[web2py] Unique Constraint not working for : Field(type='upload', unique=True)

[François Delpierre]

Hi,

The unique constraint is not working in the following Field definition.

    Field('f_xlsfile', type='upload', notnull=True,
          requires=[
              IS_UPLOAD_FILENAME(extension='^xlsx?$',
                  error_message='Please post .xls or .xlsx Excel files 
only.'),
              IS_LENGTH(1048576*2, 1024, 
                  error_message='File size must be between 1kB & 2048kB'),
              ],
          unique=True,
          label=T('Excel file')),

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