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Questions tagged [django-related-manager]

django-related-manager refers to the RelatedManager class that is used in Django to manage one-to-many or many-to-many related context

django-related-manager refers to the RelatedManager class that is used in Django to manage one-to-many or many-to-many related context.

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Exclude objects in list in Django

I'm trying to make a new list of unused/unselected objects, so that I can show in the template what is used, and what is not used. My model: class Benefit(models.Model): name = models.CharField(max_length=200) class Profile(models.Model): …
Tomas Jacobsen
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JSON for Foreign Key relationships

Let's say I have an example like the doc's: class Reporter(models.Model): first_name = models.CharField(max_length=30) last_name = models.CharField(max_length=30) email = models.EmailField() def __unicode__(self): return…
user2476581
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List of publishers for an author

This works, but is there a Django idiom that does it better? my_books = Book.objects.filter(author__name=='me') my_publishers = Publisher.objects.filter(pk__in=[b.publisher.id for b in my_books]) models = round_up_the_usual_suspects() class…
neil.millikin
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How to use RelatedManager add() method in save()

Banging head against the wall again. I'm trying to add tags using other known fields # models.py class MyModel(models.Model): ... tags = models.ManyToManyField(Tag, blank=True) field_m2m = models.ManyToManyField('M2mModel', blank=True) …
gwaramadze
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django - how to get searched object in template thru relatedmanager

I am trying to write a search logic. but i am stuck here. I have Location Model and Rate Model. Each Location can have multiple rates. these are classes class Location(models.Model): name = models.TextField() price =…
doniyor
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django related manager - get specific data

I am trying to get rate of the user who has written the comment. this is the scenario: I hold the comment about Something in my hand, I hold the user in my hand who wrote this comment Something. Now I need to know the rate which is given by the…
doniyor
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How to do validation on django's ManyRelatedManager?

I would like to change the behavior, maybe overwriting, when I add an instance to a M2M relation, so that I could do something like this: try: my_instance.one_field_set.add( another_instance ) except ValidationError: # do something Is that…
zVictor
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How to 'order_by' model objects in Django using a field several levels of relationship apart

I have multiple models for an app that will contain option to generate forms for various companies. I am using mySQL. Also, I am a Noob :( FSForm is the master form. Whenever it is generated, it gets its 'fskey' from the 'Company' object (some logic…
mad_accountant
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'ReverseManyToOneDescriptor' object has no attribute 'filter' Django

Hi there Im trying to retrieve a specific object from the related model so as to render data to my view specific to that particular object, in my case I have a custom user model and a related model called Seller. Models from django.db import…
Jordan Rob
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