reports.py 文件源码

def _eval(self):
        results = self.aggregate(**self._params)
        try:
            values = isinstance(results, ValuesQuerySet)
        except NameError:       # django >= 1.9
            values = results.__class__ is not ModelIterable
        if isinstance(results, QuerySet) and not values:
            self._data_type = 'qs'
        elif pnd and isinstance(results, DataFrame):
            self._data_type = 'df'
        self._split_totals(results)
        self._evaluated = True