Django中Mongodb中的级联更改

Question

Is there a way to change a element of collection in Mongoose and be cascade changed in other collection that points this element, similar to using MySQLs foreign keys?

For example, in MySQL I'd assign a foreign key and set it to cascade on change or delete. Thus, if I were to delete or change name of a activity_Type, all applications and associated activity_Types would be removed or affected as well.

class ValuesHelper(object):


    NAME = 'activityType'

    def __init__(self, neo_on=False):
        self.client = MongoClient(settings.DATABASES['mongo']['HOST'],settings.DATABASES['mongo']['PORT'])
        self.db = self.client[settings.DATABASES['mongo']['NAME']]

Answer 1

Unfortunately, there is no support for cascade changes at the moment. (Take a look at this jira ticket )

So you need to implement that behavior in your application. For example, if you were using Mongoose, you can do it using its remove Middleware. Take a look at JohnnyHK's answer from another SO question for an example.