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from osv import fields,osv
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class Invoice(osv.osv):
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_inherit = 'account.invoice'
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'to_export': fields.boolean('To export'),
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'to_update': fields.boolean('To update'),
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'to_export': lambda *a: True,
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'to_update': lambda *a: False,
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def write(self, cr, uid, ids, values, context=None):
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if "to_update" not in values:
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values['to_update'] = True
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return super(Invoice,self).write(cr, uid, ids, values, context)