diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index a3970ff7ae..f73fee669c 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -265,9 +265,13 @@ def _map_field(self, field):
'items': {},
}
if not isinstance(field.child, _UnvalidatedField):
- mapping['items'] = {
- "type": self._map_field(field.child).get('type')
+ map_field = self._map_field(field.child)
+ items = {
+ "type": map_field.get('type')
}
+ if 'format' in map_field:
+ items['format'] = map_field.get('format')
+ mapping['items'] = items
return mapping
# DateField and DateTimeField type is string
@@ -337,6 +341,9 @@ def _map_field(self, field):
'type': 'integer'
}
self._map_min_max(field, content)
+ # 2147483647 is max for int32_size, so we use int64 for format
+ if int(content.get('maximum', 0)) > 2147483647 or int(content.get('minimum', 0)) > 2147483647:
+ content['format'] = 'int64'
return content
# Simplest cases, default to 'string' type:
diff --git a/tests/schemas/test_openapi.py b/tests/schemas/test_openapi.py
index 78c00d9850..a29056c975 100644
--- a/tests/schemas/test_openapi.py
+++ b/tests/schemas/test_openapi.py
@@ -48,6 +48,10 @@ def test_list_field_mapping(self):
(serializers.ListField(child=serializers.BooleanField()), {'items': {'type': 'boolean'}, 'type': 'array'}),
(serializers.ListField(child=serializers.FloatField()), {'items': {'type': 'number'}, 'type': 'array'}),
(serializers.ListField(child=serializers.CharField()), {'items': {'type': 'string'}, 'type': 'array'}),
+ (serializers.ListField(child=serializers.IntegerField(max_value=4294967295)),
+ {'items': {'type': 'integer', 'format': 'int64'}, 'type': 'array'}),
+ (serializers.IntegerField(min_value=2147483648),
+ {'type': 'integer', 'minimum': 2147483648, 'format': 'int64'}),
]
for field, mapping in cases:
with self.subTest(field=field):
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