我正在用pythondjangodrf创建一个序列化程序,我正在创建一个单独的helper类并试图重写create方法。你知道吗
我的助手类:
class WorkFlowHelper:
def assign_level_permissions(self,workflow_level,level):
for permission in level['permissions']:
workflow_permission_obj = WorkflowPermission.objects.get(short_name=permission['short_name'])
workflow_level.permissions.add(workflow_permission_obj)
def create_levels(self,workflow,levels):
for level in levels:
workflow_level = WorkflowLevel()
workflow_level.workflow=workflow,
workflow_level.level = level['level']
workflow_level.operation=level['operation']
workflow_level.save()
workflow.levels.add(workflow_level)
self.assign_level_permissions(workflow_level,level)
def create_categories(self,workflow, categories):
for category in categories:
workflow_category_obj = WorkflowCategory.objects.get(short_name=category['short_name'])
workflow.categories.add(workflow_category_obj)
def create(self,name, description,tenant, levels, categories):
workflow = Workflow.objects.create(name=name, description=description, tenant=tenant)
self.create_levels(workflow,levels)
self.create_categories(workflow,categories)
workflow.save()
return workflow
在序列化程序中,我必须调用create方法,如下所示:
def create(self, validated_data):
name=validated_data['name']
description=validated_data.get('description'),
tenant=self.context['request'].user.tenant
levels = self.initial_data['levels']
categories = self.initial_data['categories']
helper = WorkFlowHelper()
helper.create(name,description,tenant,levels,categories)
在helper类中,我从同一类中的函数调用其他函数。我怀疑如何在函数中传递自我打电话。现在我可以保存模型并且一切正常,但是就在post之后,它显示的create()没有返回object instance AssertionError..但是它正在保存模型并且工作得很好
self
是对对象本身的引用。使用self
作为函数的第一个参数,可以创建实例方法。因此,如果要使用instance方法,则需要初始化该类的一个对象,然后使用该对象调用函数。例如,在这里:作为参考,您可以检查here。你知道吗
这起作用了:
在序列化程序中:
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