Python django.db.models.aggregates.Variance() Examples
The following are 6 code examples for showing how to use django.db.models.aggregates.Variance(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.
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Example 1
Project: bioforum Author: reBiocoder File: operations.py License: MIT License | 6 votes |
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): for expr in expression.get_source_expressions(): try: output_field = expr.output_field except FieldError: # Not every subexpression has an output_field which is fine # to ignore. pass else: if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev, and Variance ' 'aggregations on date/time fields in sqlite3 ' 'since date/time is saved as text.' )
Example 2
Project: Hands-On-Application-Development-with-PyCharm Author: PacktPublishing File: operations.py License: MIT License | 6 votes |
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): for expr in expression.get_source_expressions(): try: output_field = expr.output_field except FieldError: # Not every subexpression has an output_field which is fine # to ignore. pass else: if isinstance(output_field, bad_fields): raise utils.NotSupportedError( 'You cannot use Sum, Avg, StdDev, and Variance ' 'aggregations on date/time fields in sqlite3 ' 'since date/time is saved as text.' )
Example 3
Project: python Author: Yeah-Kun File: operations.py License: Apache License 2.0 | 6 votes |
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): for expr in expression.get_source_expressions(): try: output_field = expr.output_field if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev, and Variance ' 'aggregations on date/time fields in sqlite3 ' 'since date/time is saved as text.' ) except FieldError: # Not every subexpression has an output_field which is fine # to ignore. pass
Example 4
Project: openhgsenti Author: drexly File: operations.py License: Apache License 2.0 | 6 votes |
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): for expr in expression.get_source_expressions(): try: output_field = expr.output_field if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev, and Variance ' 'aggregations on date/time fields in sqlite3 ' 'since date/time is saved as text.' ) except FieldError: # Not every subexpression has an output_field which is fine # to ignore. pass
Example 5
Project: python2017 Author: bpgc-cte File: operations.py License: MIT License | 6 votes |
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): for expr in expression.get_source_expressions(): try: output_field = expr.output_field if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev, and Variance ' 'aggregations on date/time fields in sqlite3 ' 'since date/time is saved as text.' ) except FieldError: # Not every subexpression has an output_field which is fine # to ignore. pass
Example 6
Project: GTDWeb Author: lanbing510 File: operations.py License: GNU General Public License v2.0 | 5 votes |
def check_expression_support(self, expression): bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField) bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev) if isinstance(expression, bad_aggregates): try: output_field = expression.input_field.output_field if isinstance(output_field, bad_fields): raise NotImplementedError( 'You cannot use Sum, Avg, StdDev and Variance aggregations ' 'on date/time fields in sqlite3 ' 'since date/time is saved as text.') except FieldError: # not every sub-expression has an output_field which is fine to # ignore pass