Loading docs/ref/databases.txt +8 −0 Original line number Diff line number Diff line Loading @@ -513,6 +513,14 @@ for the field. This affects :class:`~django.db.models.CharField`, :class:`~django.db.models.SlugField` and :class:`~django.db.models.CommaSeparatedIntegerField`. ``TextField`` limitations ~~~~~~~~~~~~~~~~~~~~~~~~~ MySQL can index only the first N chars of a ``BLOB`` or ``TEXT`` column. Since ``TextField`` doesn't have a defined length, you can't mark it as ``unique=True``. MySQL will report: "BLOB/TEXT column '<db_column>' used in key specification without a key length". .. _mysql-fractional-seconds: Fractional seconds support for Time and DateTime fields Loading Loading
docs/ref/databases.txt +8 −0 Original line number Diff line number Diff line Loading @@ -513,6 +513,14 @@ for the field. This affects :class:`~django.db.models.CharField`, :class:`~django.db.models.SlugField` and :class:`~django.db.models.CommaSeparatedIntegerField`. ``TextField`` limitations ~~~~~~~~~~~~~~~~~~~~~~~~~ MySQL can index only the first N chars of a ``BLOB`` or ``TEXT`` column. Since ``TextField`` doesn't have a defined length, you can't mark it as ``unique=True``. MySQL will report: "BLOB/TEXT column '<db_column>' used in key specification without a key length". .. _mysql-fractional-seconds: Fractional seconds support for Time and DateTime fields Loading
