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Update docs for @DiscriminatorColumn to indicate that it is optional.

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Bill Schaller 2016-01-05 12:30:29 -05:00
parent d97fad26a5
commit 6963fd8f20
1 changed files with 4 additions and 1 deletions
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docs/en/reference/annotations-reference.rst
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@ -236,11 +236,14 @@ Example:
@DiscriminatorColumn
~~~~~~~~~~~~~~~~~~~~~
This annotation is a required annotation for the topmost/super
This annotation is an optional annotation for the topmost/super
class of an inheritance hierarchy. It specifies the details of the
column which saves the name of the class, which the entity is
actually instantiated as.
If this annotation is not specified, the discriminator column defaults
to a string column of length 255 called ``dtype``.
Required attributes: