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Required MySQLdb >= 1.2.5 for fractional seconds support 

On MySQLdb < 1.2.5, MySQLdb returns None when fetching datetime/time
values with fractional seconds.
See https://github.com/farcepest/MySQLdb1/issues/24
This commit is contained in:
Claude Paroz 2014-10-11 14:47:54 +02:00
parent 22da5f8817
commit 713f23492a
2 changed files with 10 additions and 3 deletions
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4
django/db/backends/mysql/base.py
View File

@ -211,7 +211,9 @@ class DatabaseFeatures(BaseDatabaseFeatures):
@cached_property @cached_property
def supports_microsecond_precision(self): def supports_microsecond_precision(self):
return self.connection.mysql_version >= (5, 6, 4) # See https://github.com/farcepest/MySQLdb1/issues/24 for the reason
# about requiring MySQLdb 1.2.5
return self.connection.mysql_version >= (5, 6, 4) and Database.version_info >= (1, 2, 5)
@cached_property @cached_property
def has_zoneinfo_database(self): def has_zoneinfo_database(self):

9
docs/ref/databases.txt
View File

@ -503,7 +503,11 @@ Fractional seconds support for Time and DateTime fields
MySQL 5.6.4 and later can store fractional seconds, provided that the MySQL 5.6.4 and later can store fractional seconds, provided that the
column definition includes a fractional indication (e.g. ``DATETIME(6)``). column definition includes a fractional indication (e.g. ``DATETIME(6)``).
Earlier versions do not support them at all. Earlier versions do not support them at all. In addition, versions of MySQLdb
older than 1.2.5 have `a bug`_ that also prevents the use of fractional seconds
with MySQL.
.. _a bug: https://github.com/farcepest/MySQLdb1/issues/24
Django will not upgrade existing columns to include fractional seconds if the Django will not upgrade existing columns to include fractional seconds if the
database server supports it. If you want to enable them on an existing database, database server supports it. If you want to enable them on an existing database,
@ -521,7 +525,8 @@ or using a :class:`~django.db.migrations.operations.RunSQL` operation in a
``time`` values when using the MySQL backend. Now it lets the database ``time`` values when using the MySQL backend. Now it lets the database
decide whether it should drop that part of the value or not. By default, new decide whether it should drop that part of the value or not. By default, new
``DateTimeField`` or ``TimeField`` columns are now created with fractional ``DateTimeField`` or ``TimeField`` columns are now created with fractional
seconds support on MySQL 5.6.4 or later. seconds support on MySQL 5.6.4 or later with either mysqlclient or
MySQLdb 1.2.5 or later.
``TIMESTAMP`` columns ``TIMESTAMP`` columns
~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~