Re: [Django] #35431: Failing to serialize NumericRange with CheckConstraint on IntegerRangeField

[Django]

#35431: Failing to serialize NumericRange with CheckConstraint on 
IntegerRangeField
+--
 Reporter:  Arran   |Owner:  nobody
 Type:  Bug |   Status:  closed
Component:  Migrations  |  Version:  5.0
 Severity:  Normal  |   Resolution:  invalid
 Keywords:  | Triage Stage:  Unreviewed
Has patch:  0   |  Needs documentation:  0
  Needs tests:  0   |  Patch needs improvement:  0
Easy pickings:  0   |UI/UX:  0
+--
Changes (by Mariusz Felisiak):

 * resolution:   => invalid
 * status:  new => closed

Comment:

 You need to add `django.contrib.postgres` to the `INSTALLED_APPS` this
 will register PostgreSQL-specific serializers.
-- 
Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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[Django] #35431: Failing to serialize NumericRange with CheckConstraint on IntegerRangeField

[Django]

#35431: Failing to serialize NumericRange with CheckConstraint on 
IntegerRangeField
--+
   Reporter:  Arran   |  Owner:  nobody
   Type:  Bug | Status:  new
  Component:  Migrations  |Version:  5.0
   Severity:  Normal  |   Keywords:
   Triage Stage:  Unreviewed  |  Has patch:  0
Needs documentation:  0   |Needs tests:  0
Patch needs improvement:  0   |  Easy pickings:  0
  UI/UX:  0   |
--+
 I am trying to create a PostgreSQL check constraint on an
 `IntegerRangeField`, but when I run `makemigrations` I get the following
 error:

 {{{
 ValueError: Cannot serialize: Range(1, 1, '[)')
 There are some values Django cannot serialize into migration files.
 }}}

 Here's a simple example of my model which raises the error:

 {{{
 from django.contrib.postgres.fields import IntegerRangeField
 from django.db.backends.postgresql.psycopg_any import NumericRange
 from django.db import models
 from django.db.models.constraints import CheckConstraint
 from django.db.models.expressions import Q


 class MyModel(models.Model):
 price_range = IntegerRangeField()

 class Meta:
 constraints = [
 CheckConstraint(
 check=Q(price_range__contained_by=NumericRange(1, 1)),
 name="price_range_gt_1_and_lte_1",
 )
 ]
 }}}

 Judging by the following ticket this should work, so any help would be
 welcome:

 [https://code.djangoproject.com/ticket/30258]

 Thanks!
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Ticket URL: 
Django 
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