#27995: Raise a descriptive error on unsupported operations following
QuerySet.union()
-------------------------------------+-------------------------------------
Reporter: Tim | Owner: nobody
Graham |
Type: | Status: new
Cleanup/optimization |
Component: Database | Version: 1.10
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: Accepted | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
The documentation for `QuerySet.union()` says, "In addition, only LIMIT,
OFFSET, and ORDER BY (i.e. slicing and order_by()) are allowed on the
resulting QuerySet.", however, there isn't any strict enforcement about
this -- some operations like `QuerySet.count()` might appear to work. See
#27982 and #27990 for confusion about this.
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Ticket URL: <https://code.djangoproject.com/ticket/27995>
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