#27697: JSONField with blank=True is rendered as non-required field in a 
ModelForm
--------------------------------------------+--------------------------
               Reporter:  aruseni           |          Owner:  (none)
                   Type:  Bug               |         Status:  new
              Component:  contrib.postgres  |        Version:  1.10
               Severity:  Normal            |       Keywords:  postgres
           Triage Stage:  Unreviewed        |      Has patch:  0
    Needs documentation:  0                 |    Needs tests:  0
Patch needs improvement:  0                 |  Easy pickings:  0
                  UI/UX:  0                 |
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 Try adding a JSONField with blank=True and without null=True to your
 model, and then use this model in the admin, the field will be rendered as
 a non-required field, and if you specify {} as the value, everything saves
 just fine.

 If you don’t specify any value though, an error occurs:

 {{{
 null value in column "json" violates not-null constraint
 }}}

 If you just use a zero-configuration JSONField without blank=True, then
 the form will not validate when an empty dictionary is specified.

--
Ticket URL: <https://code.djangoproject.com/ticket/27697>
Django <https://code.djangoproject.com/>
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