102 lines
3.7 KiB
Python
102 lines
3.7 KiB
Python
from rest_framework import serializers
|
|
from rest_framework.serializers import ModelSerializer
|
|
from rest_framework.fields import empty
|
|
from rest_framework.request import Request
|
|
|
|
|
|
class CustomModelSerializer(ModelSerializer):
|
|
"""
|
|
增强DRF的ModelSerializer,可自动更新模型的审计字段记录
|
|
(1)仅当op_drf.generics.GenericAPIView的子类里使用时有效
|
|
(2)非op_drf.generics.GenericAPIView里使用时, 与ModelSerializer作用一样,没人任何增强
|
|
(3)self.request能获取到rest_framework.request.Request对象
|
|
"""
|
|
# 修改人的审计字段名称, 默认modifier, 继承使用时可自定义覆盖
|
|
modifier_field_name = 'modifier'
|
|
# 创建人的审计字段名称, 默认creator, 继承使用时可自定义覆盖
|
|
creator_field_name = 'creator'
|
|
# 数据所属部门字段
|
|
dept_belong_id_field_name = 'dept_belong_id'
|
|
# 添加默认时间返回格式
|
|
create_datetime = serializers.DateTimeField(format="%Y-%m-%d %H:%M:%S", required=False, read_only=True)
|
|
update_datetime = serializers.DateTimeField(format="%Y-%m-%d %H:%M:%S", required=False, read_only=True)
|
|
|
|
def __init__(self, instance=None, data=empty, request=None, **kwargs):
|
|
super().__init__(instance, data, **kwargs)
|
|
self.request: Request = request
|
|
|
|
def save(self, **kwargs):
|
|
return super().save(**kwargs)
|
|
|
|
def create(self, validated_data):
|
|
if self.request:
|
|
username = self.get_request_username()
|
|
if self.modifier_field_name in self.fields.fields:
|
|
validated_data[self.modifier_field_name] = username
|
|
if self.creator_field_name in self.fields.fields:
|
|
validated_data[self.creator_field_name] = self.request.user
|
|
if self.dept_belong_id_field_name in self.fields.fields:
|
|
validated_data[self.dept_belong_id_field_name] = getattr(self.request.user,'dept_id',None)
|
|
return super().create(validated_data)
|
|
|
|
def update(self, instance, validated_data):
|
|
if self.request:
|
|
if hasattr(self.instance, self.modifier_field_name):
|
|
self.instance.modifier = self.get_request_username()
|
|
return super().update(instance, validated_data)
|
|
|
|
def get_request_username(self):
|
|
if getattr(self.request, 'user', None):
|
|
return getattr(self.request.user, 'username', None)
|
|
return None
|
|
|
|
|
|
|
|
@property
|
|
def fields(self):
|
|
fields = super().fields
|
|
|
|
if not hasattr(self, '_context'):
|
|
return fields
|
|
is_root = self.root == self
|
|
parent_is_list_root = self.parent == self.root and getattr(self.parent, 'many', False)
|
|
if not (is_root or parent_is_list_root):
|
|
return fields
|
|
|
|
try:
|
|
request = self.request or self.context['request']
|
|
except KeyError:
|
|
return fields
|
|
params = getattr(
|
|
request, 'query_params', getattr(request, 'GET', None)
|
|
)
|
|
if params is None:
|
|
pass
|
|
try:
|
|
filter_fields = params.get('_fields', None).split(',')
|
|
except AttributeError:
|
|
filter_fields = None
|
|
|
|
try:
|
|
omit_fields = params.get('_omit', None).split(',')
|
|
except AttributeError:
|
|
omit_fields = []
|
|
|
|
existing = set(fields.keys())
|
|
if filter_fields is None:
|
|
allowed = existing
|
|
else:
|
|
allowed = set(filter(None, filter_fields))
|
|
|
|
omitted = set(filter(None, omit_fields))
|
|
for field in existing:
|
|
if field not in allowed:
|
|
fields.pop(field, None)
|
|
if field in omitted:
|
|
fields.pop(field, None)
|
|
|
|
return fields
|
|
|
|
|
|
|