Add hasattr to get product or template revision in issue12216.diff
#162161
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@ -49,7 +49,7 @@ index e4da113ef3..96a9fac580 100644
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+ try:
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+ amount = simple_eval(decistmt(self.cost_price), **context)
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+ except (InvalidExpression, SyntaxError) as exception:
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+ product = self.product or self.template
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+ product = hasattr(self, 'product') and self.product or self.template
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+ raise ProductCostPriceError(
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+ gettext('stock.msg_invalid_cost_price',
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+ cost_price=self.cost_price,
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