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I have the following class
public class ElementBean {
private String link;
private Set<ElementBean> connections;
}
I need to create a map table where elements are mapped to each other in a many-to-many symmetrical relationship.
@ManyToMany(targetEntity=ElementBean.class)
@JoinTable(
…
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I'm sure this is really simple, but I can't for the life of me find any documentation explaining how to do this.
How do I get the results of a ManyToMany field inside a join as opposed to doing this:
{% for tag in article.tags.all %}
Which results in an extra query? What I'd like to do is fetch…
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Hay I've got a question about relationships.
I want to Users to have Friendships. So a User can be a friend with another User. I'm assuming i'll need to use the ManyToManyField, through a Friendship table. But i cannot get it to work. Any ideas?
Here are my models.
class User(models.Model):
…
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Background
I've created three Django models—Inventory, SalesOrder, and Invoice—to model items in inventory, sales orders for those items, and invoices for a particular sales order. Each sales order can have multiple items, so I've used an intermediary junction table—SalesOrderItems—using the through…
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from an instance of Site with a ManyToMany relationship to Kiosk, i'd like to check if a Kiosk object is part of the relationship.
I could do
self.apps.get(id=app_id).exists() and check if True
or
self.apps.get(id=app_id) and catch the ObjectDoesNotExist error
or
self.apps.filter(id=app_id)…
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