#19221: Check that cache keys are string
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     Reporter:  Mark Hughes          |                    Owner:  Dan
                                     |  Stephenson
         Type:  Bug                  |                   Status:  assigned
    Component:  Core (Cache system)  |                  Version:  master
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
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Comment (by Balazs Endresz):

 The `default_key_func` is still the old version in the docs, which fails
 with any non-string arguments:
 https://github.com/django/django/blob/stable/3.0.x/docs/ref/settings.txt#L171

 Btw, not just the `key` but the `key_prefix` can be non-string too. What
 tripped me up was this in the test settings:
 `CACHES['default']['KEY_PREFIX'] = random()` when used with the
 `KEY_PREFIX` code snippet from the docs.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/19221#comment:16>
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