Refs #35234 -- Deprecated CheckConstraint.check in favor of .condition.

Once the deprecation period ends CheckConstraint.check() can become the
documented method that performs system checks for BaseConstraint
subclasses.

docs/internals/deprecation.txt

@@ -77,6 +77,8 @@ details on these changes.
 * ``django.urls.register_converter()`` will no longer allow overriding existing
   converters.
 
+* The ``check`` keyword argument of ``CheckConstraint`` will be removed.
+
 .. _deprecation-removed-in-5.1:
 
 5.1

docs/ref/models/constraints.txt

@@ -26,7 +26,7 @@ option.
     (including ``name``) each time. To work around name collisions, part of the
     name may contain ``'%(app_label)s'`` and ``'%(class)s'``, which are
     replaced, respectively, by the lowercased app label and class name of the
-    concrete model. For example ``CheckConstraint(check=Q(age__gte=18),
+    concrete model. For example ``CheckConstraint(condition=Q(age__gte=18),
     name='%(app_label)s_%(class)s_is_adult')``.
 
 .. admonition:: Validation of Constraints
@@ -104,19 +104,19 @@ This method must be implemented by a subclass.
 ``CheckConstraint``
 ===================
 
-.. class:: CheckConstraint(*, check, name, violation_error_code=None, violation_error_message=None)
+.. class:: CheckConstraint(*, condition, name, violation_error_code=None, violation_error_message=None)
 
     Creates a check constraint in the database.
 
-``check``
----------
+``condition``
+-------------
 
-.. attribute:: CheckConstraint.check
+.. attribute:: CheckConstraint.condition
 
 A :class:`Q` object or boolean :class:`~django.db.models.Expression` that
-specifies the check you want the constraint to enforce.
+specifies the conditional check you want the constraint to enforce.
 
-For example, ``CheckConstraint(check=Q(age__gte=18), name='age_gte_18')``
+For example, ``CheckConstraint(condition=Q(age__gte=18), name='age_gte_18')``
 ensures the age field is never less than 18.
 
 .. admonition:: Expression order
@@ -127,7 +127,7 @@ ensures the age field is never less than 18.
     reasons. For example, use the following format if order matters::
 
         CheckConstraint(
-            check=Q(age__gte=18) & Q(expensive_check=condition),
+            condition=Q(age__gte=18) & Q(expensive_check=condition),
             name="age_gte_18_and_others",
         )
 
@@ -138,7 +138,11 @@ ensures the age field is never less than 18.
     to behave the same as check constraints validation. For example, if ``age``
     is a nullable field::
 
-        CheckConstraint(check=Q(age__gte=18) | Q(age__isnull=True), name="age_gte_18")
+        CheckConstraint(condition=Q(age__gte=18) | Q(age__isnull=True), name="age_gte_18")
+
+.. deprecated:: 5.1
+
+    The ``check`` attribute is deprecated in favor of ``condition``.
 
 ``UniqueConstraint``
 ====================

docs/ref/models/options.txt

@@ -467,7 +467,7 @@ not be looking at your Django code. For example::
 
             class Meta:
                 constraints = [
-                    models.CheckConstraint(check=models.Q(age__gte=18), name="age_gte_18"),
+                    models.CheckConstraint(condition=models.Q(age__gte=18), name="age_gte_18"),
                 ]
 
 ``verbose_name``

docs/releases/3.1.txt

@@ -388,7 +388,7 @@ Models
   ``OneToOneField`` emulates the behavior of the SQL constraint ``ON DELETE
   RESTRICT``.
 
-* :attr:`.CheckConstraint.check` now supports boolean expressions.
+* ``CheckConstraint.check`` now supports boolean expressions.
 
 * The :meth:`.RelatedManager.add`, :meth:`~.RelatedManager.create`, and
   :meth:`~.RelatedManager.set` methods now accept callables as values in the

docs/releases/5.1.txt

@@ -422,6 +422,9 @@ Miscellaneous
 * Overriding existing converters with ``django.urls.register_converter()`` is
   deprecated.
 
+* The ``check`` keyword argument of ``CheckConstraint`` is deprecated in favor
+  of ``condition``.
+
 Features removed in 5.1
 =======================