Fix: validate cf integer values within PostgreSQL range (#11666)

src/documents/serialisers.py

@@ -18,6 +18,8 @@ from django.core.exceptions import ValidationError
 from django.core.validators import DecimalValidator
 from django.core.validators import EmailValidator
 from django.core.validators import MaxLengthValidator
+from django.core.validators import MaxValueValidator
+from django.core.validators import MinValueValidator
 from django.core.validators import RegexValidator
 from django.core.validators import integer_validator
 from django.db.models import Count
@@ -875,6 +877,13 @@ class CustomFieldInstanceSerializer(serializers.ModelSerializer):
                 uri_validator(data["value"])
             elif field.data_type == CustomField.FieldDataType.INT:
                 integer_validator(data["value"])
+                try:
+                    value_int = int(data["value"])
+                except (TypeError, ValueError):
+                    raise serializers.ValidationError("Enter a valid integer.")
+                # Keep values within the PostgreSQL integer range
+                MinValueValidator(-2147483648)(value_int)
+                MaxValueValidator(2147483647)(value_int)
             elif (
                 field.data_type == CustomField.FieldDataType.MONETARY
                 and data["value"] != ""