16、Serializer类中使用request
1、将视图类函数参数传递到序列化器中
class ProjectMilestoneView(APIView):
""" 里程碑 """
# @checkLogin
def get(self, request, *args, **kwargs):
"""
里程碑展示
- 参数位置
- 查询参数
- 请求参数：
- page：页码 // 非必填
- limit：每页的数据量 // 非必填
- project_id: 1 // 必填
- 成功返回：
```json5
```
- 失败返回：
```json5
{
"code": 0,
"msg": "异常信息",
"data": ""
}
```
"""
cur_user_name = request.session.get('userName')
page = request.query_params.get('page') # 当前页码
limit = request.query_params.get('limit') # 每页的数据条数
project_id = request.query_params.get('project_id', "") # 项目id
check_res = page_row_check(page, limit)
if not check_res:
return Response(res_message(False, 'page、limit页码格式错误!!!'))
if not project_id:
return Response(res_message(False, '缺少必传参数`project_id`'))
queryset = models.ProjectMilestone.objects.filter(milestone_project_id=project_id).order_by(
'milestone_create_time')
ser = serializers.ProjectMilestoneReadSerializer(instance=queryset, many=True, context={"request":request}) # 传递视图类参数
logger.info(f'{cur_user_name}：查看了项目里程碑列表')
page_display_list = data_paging(ser.data, page, limit)
return Response(res_message(True, '项目里程碑列表查询成功', {"total": len(ser.data), 'data': page_display_list}))
class ProjectMilestoneReadSerializer(serializers.ModelSerializer):
""" 项目里程碑 """
milestone_principal_name = serializers.CharField(source='milestone_principal.user_name', read_only=True)
milestone_principal = serializers.SerializerMethodField()
milestone_deliverables = serializers.SerializerMethodField()
parent_task_data = serializers.SerializerMethodField()
class Meta:
model = models.ProjectMilestone
exclude = []
extra_kwargs = {
'milestone_start_time': {'format': '%Y-%m-%d'},
'milestone_end_time': {'format': '%Y-%m-%d'},
'milestone_create_time': {'format': '%Y-%m-%d %H:%M'},
'milestone_update_time': {'format': '%Y-%m-%d %H:%M'}
}
def get_milestone_principal(self, obj):
""" 负责人 """
if obj.milestone_principal:
return obj.milestone_principal.id
else:
return ''
def get_milestone_deliverables(self, obj):
""" 交付物信息 """
deliverables_list = models.ProjectMilestoneDeliverables.objects.filter(deliverable_to_milestone=obj.id)
all_deliverables_info = []
for single_obj in deliverables_list:
all_deliverables_info.append({
"id": single_obj.id,
"deliverable_name": '.'.join(single_obj.deliverable_name.split(".")[:-1]),
"deliverable_update_time": single_obj.deliverable_update_time.strftime("%Y/%m/%d"),
"file": single_obj.deliverable_name
})
return all_deliverables_info
def get_parent_task_data(self, obj):
parent_task_url = "http://localhost:" + self.context.get('request').get_port() + reverse('parent_task') # 获取视图类参数
try:
response_result = requests.get(url=parent_task_url, params={"milestone_id": obj.id}).json()
parent_task_data = response_result.get("data").get("data")
return parent_task_data
except Exception as e:
logger.error(f"查询父任务异常，异常原因为：{str(e)}")
raise CustomException(f"查询父任务异常，异常原因为：{str(e)}")
2、总结
- 在视图类中使用context传递：serializers.ProjectMilestoneReadSerializer(instance=queryset, many=True, context={"request":request})
- 在序列化器中在context中获取：self.context.get('request')
