<p>@Lotram的答案对返回多个值的字段无效(通过<code>many=True</code>)。在</p>
<p>以下代码改进了@Lotram的解决方案,该方案适用于返回多个值的字段:</p>
<pre><code>class NestedDynamicFieldsModelSerializer(serializers.ModelSerializer):
def __init__(self, *args, **kwargs):
def parse_nested_fields(fields):
field_object = {"fields": []}
for f in fields:
obj = field_object
nested_fields = f.split("__")
for v in nested_fields:
if v not in obj["fields"]:
obj["fields"].append(v)
if nested_fields.index(v) < len(nested_fields) - 1:
obj[v] = obj.get(v, {"fields": []})
obj = obj[v]
return field_object
def select_nested_fields(serializer, fields):
for k in fields:
if k == "fields":
fields_to_include(serializer, fields[k])
else:
select_nested_fields(serializer.fields[k], fields[k])
def fields_to_include(serializer, fields):
# Drop any fields that are not specified in the `fields` argument.
allowed = set(fields)
if isinstance(serializer, serializers.ListSerializer):
existing = set(serializer.child.fields.keys())
for field_name in existing - allowed:
serializer.child.fields.pop(field_name)
else:
existing = set(serializer.fields.keys())
for field_name in existing - allowed:
serializer.fields.pop(field_name)
# Don't pass the 'fields' arg up to the superclass
fields = kwargs.pop('fields', None)
# Instantiate the superclass normally
super(NestedDynamicFieldsModelSerializer, self).__init__(*args, **kwargs)
if fields is not None:
# import pdb; pdb.set_trace()
fields = parse_nested_fields(fields)
# Drop any fields that are not specified in the `fields` argument.
select_nested_fields(self, fields)
</code></pre>