sqlalchemy.ext.declarative docs should mention how to set CheckConstraint()'s

[Former user]

There should be an example how to set CheckConstraint when using declarative_base extension as it doesn't work as intuitively as expected:

__table_args__ = (CheckConstraint(...))

I guess simple example describing how to add them would be nice:

__table_args__ = ( CheckConstraint(...), {})

[Mike Bayer]

there's an example of both ForeignKeyConstraint and UniqueConstraint here, http://www.sqlalchemy.org/docs/reference/ext/declarative.html#table-configuration , accompanied by the text "allows positional arguments to be specified as well (usually constraints)" .... is CheckConstraint so different ?

[Former user]

Nope, the issue was more that when I only have one constraint to add, I also have to specify an empty dict after it ;)

Now that I read that part again I finally noticed the: "Note that the keyword parameters dictionary is required in the tuple form even if empty."

Maybe add a simple example after this note?

[Mike Bayer]

i'd rather make the kw dict optional entirely, but that's a different issue. closing this for now.