python - How to add custom field to mongoengine model? -


i have project model follows:

class project(me.document):     title = me.stringfield(max_length=64, required=true, unique=true)     start_date = me.datetimefield(default=datetime.utcnow())     end_date = me.datetimefield(default=datetime.utcnow())     duration = me.intfield() #  sprint duration     sequence = me.intfield()      def __init__(self, *args, **values):         super(project, self).__init__( *args, **values)      def __str__(self):         return self.title       def get_current_sprint(self):          ''' logic here calculate current sprint.'''

and anther model sprint:

class sprint(me.document):     start_date = me.datetimefield()     end_date = me.datetimefield()     sequence = me.intfield(required=true, default=0, unique_with='project')     project = me.referencefield('project')

if have project instance can current sprint calling method 

project.get_current_sprint()

but trying ; whenever project object being queried, rather calling method current sprint, should have attribute project.current_sprint has current sprint info.

is there way achieve it?

any appreciated.

i think concept of you're looking called database references in mongodb.

in mongoengine, create referencefield in project model, reference sprint document.


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