defer() doesn't work cleanly with model inheritance

[Malcolm Tredinnick]

Saving a model where an inherited field has been passed to defer() leads to badness (Django crashes :-( ).

I know about. I'll fix it for 1.1. Noting here in the hope that anybody else stumbling across this will discover it's a known issue for now. Working on beta-deadline things first, though.

[Alex Gaynor]

I can't reproduce with the above tests, is it possible it's either a) version specific, b) fixed in a previous patch, or c) I misunderstood the issue.

[byron]

using only() doesn't work cleanly either. Given CustomUser which subclasses auth.User

CustomUser.objects.only("home_address").query.as_sql()

... retrieves "home_address" and all parent fields as well.

'SELECT "auth_user"."id", "auth_user"."username", "auth_user"."first_name", "auth_user"."last_name", "auth_user"."email",
"auth_user"."password", "auth_user"."is_staff", "auth_user"."is_active", "auth_user"."is_superuser", "auth_user"."last_login",
"auth_user"."date_joined", "users_customuser"."user_ptr_id", "users_customuser"."home_address" FROM "users_customuser" INNER
JOIN "auth_user" ON ("users_customuser"."user_ptr_id" = "auth_user"."id")'

[Russell Keith-Magee]

I've got a test and patch for this; however, the test has introduced an order dependency in the test suite. I'll commit once I've got this sorted out.

[Russell Keith-Magee]

(In [10926]) Fixed #10572 -- Corrected the operation of the defer() and only() clauses when used on inherited models.

[ccahoon]

(In [10995]) Fixed #10572 -- Corrected the operation of the defer() and only() clauses when used on inherited models.

[Jacob]

Milestone 1.1 deleted