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-rw-r--r--tests/postgres_tests/fields.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/tests/postgres_tests/fields.py b/tests/postgres_tests/fields.py
index c5dddf197f..d099effdd5 100644
--- a/tests/postgres_tests/fields.py
+++ b/tests/postgres_tests/fields.py
@@ -57,3 +57,8 @@ except ImportError:
class EnumField(models.CharField):
def get_prep_value(self, value):
return value.value if isinstance(value, enum.Enum) else value
+
+
+class OffByOneField(models.IntegerField):
+ def get_placeholder(self, value, compiler, connection):
+ return "(%s + 1)"