first comit

venv/lib/python3.10/site-packages/django/contrib/postgres/fields/citext.py

@@ -0,0 +1,78 @@
+import warnings
+
+from django.db.models import CharField, EmailField, TextField
+from django.test.utils import ignore_warnings
+from django.utils.deprecation import RemovedInDjango51Warning
+
+__all__ = ["CICharField", "CIEmailField", "CIText", "CITextField"]
+
+
+# RemovedInDjango51Warning.
+class CIText:
+    def __init__(self, *args, **kwargs):
+        warnings.warn(
+            "django.contrib.postgres.fields.CIText mixin is deprecated.",
+            RemovedInDjango51Warning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)
+
+    def get_internal_type(self):
+        return "CI" + super().get_internal_type()
+
+    def db_type(self, connection):
+        return "citext"
+
+
+class CICharField(CIText, CharField):
+    system_check_deprecated_details = {
+        "msg": (
+            "django.contrib.postgres.fields.CICharField is deprecated. Support for it "
+            "(except in historical migrations) will be removed in Django 5.1."
+        ),
+        "hint": (
+            'Use CharField(db_collation="…") with a case-insensitive non-deterministic '
+            "collation instead."
+        ),
+        "id": "fields.W905",
+    }
+
+    def __init__(self, *args, **kwargs):
+        with ignore_warnings(category=RemovedInDjango51Warning):
+            super().__init__(*args, **kwargs)
+
+
+class CIEmailField(CIText, EmailField):
+    system_check_deprecated_details = {
+        "msg": (
+            "django.contrib.postgres.fields.CIEmailField is deprecated. Support for it "
+            "(except in historical migrations) will be removed in Django 5.1."
+        ),
+        "hint": (
+            'Use EmailField(db_collation="…") with a case-insensitive '
+            "non-deterministic collation instead."
+        ),
+        "id": "fields.W906",
+    }
+
+    def __init__(self, *args, **kwargs):
+        with ignore_warnings(category=RemovedInDjango51Warning):
+            super().__init__(*args, **kwargs)
+
+
+class CITextField(CIText, TextField):
+    system_check_deprecated_details = {
+        "msg": (
+            "django.contrib.postgres.fields.CITextField is deprecated. Support for it "
+            "(except in historical migrations) will be removed in Django 5.1."
+        ),
+        "hint": (
+            'Use TextField(db_collation="…") with a case-insensitive non-deterministic '
+            "collation instead."
+        ),
+        "id": "fields.W907",
+    }
+
+    def __init__(self, *args, **kwargs):
+        with ignore_warnings(category=RemovedInDjango51Warning):
+            super().__init__(*args, **kwargs)