[web2py] SQLFORM.smartgrid : error when setting fields to be displayed as a fields dictionary.

[François Delpierre]

Hi,

When I try to select the fields to be displayed as follow :
    form = SQLFORM.smartgrid(
            db.t_xlsfile,
            fields=dict(
                t_xlsfile=[
                    db.t_xlsfile.f_xlsfile,
                    ],
                ),

I immediately get this strange error :
Traceback (most recent call last):
  File "/home/www-data/web2py/gluon/restricted.py", line 205, in restricted
    exec ccode in environment
  File "/home/www-data/web2py/applications/init/controllers/default.py",line 
425, in <module>
  File "/home/www-data/web2py/gluon/globals.py", line 173, in <lambda>
    self._caller = lambda f: f()
  File "/home/www-data/web2py/gluon/tools.py", line 2575, in f
    return action(*a, **b)
  File "/home/www-data/web2py/applications/init/controllers/default.py",line 
257, in posting_history
    t_xlsfile='Table of Excel files',
  File "/home/www-data/web2py/gluon/sqlhtml.py", line 1989, in smartgrid
    user_signature=user_signature,**kwargs)
  File "/home/www-data/web2py/gluon/sqlhtml.py", line 1517, in grid
    if field._tablename in tablenames]
AttributeError: 'str' object has no attribute '_tablename'

Any idea ??