query.py 文件源码

def _sortQuery(self):
        ''' Sort the query by a given parameter '''

        if not isinstance(self.sort, type(None)):
            # set the sort variable ModelClass parameter
            sortparam = self.marvinform._param_form_lookup.mapToColumn(self.sort)

            # If order is specified, then do the sort
            if self.order:
                assert self.order in ['asc', 'desc'], 'Sort order parameter must be either "asc" or "desc"'

                # Check if order by already applied
                if 'ORDER' in str(self.query.statement):
                    self.query = self.query.order_by(None)
                # Do the sorting
                if 'desc' in self.order:
                    self.query = self.query.order_by(desc(sortparam))
                else:
                    self.query = self.query.order_by(sortparam)