django-mptt is an implementation Modified Preorder Tree Traversal for handling trees of Django Model instances.
django-mptt is an implementation Modified Preorder Tree Traversal for handling trees of Django Model instances.
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Questions tagged [django-mptt]
351 questions
0
votes
1 answer
Django MPTT Filter Only if No Children Exist
So I am using MPTT for a Category model in Django, and I was wondering if there is a way to filter a Category if there is no child.
models.py:
class Category(MPTTModel, TimeStampedModel):
title = models.CharField(max_length=75)
parent =…
Hybrid
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0 answers
How to delete from binarytree data and upgrade descendents ? django-mptt
im trying a same days to solve, but i cant image the algorithm for this.
for example have a binary tree.
# [1]
# [2] [3]
# [4] [5] [6] [7]
# [8][9][10][11] [12][13][14][15]
im need to delete…
Softsofter
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votes
1 answer
Django ORM - building hierarchical data structure with multiple models
as a part of a project I'm working on, I'm trying to build an hierarchical data structure of objects from different types.
I used django-mptt for it, which promises to handle trees in a smart way with fast queries.
The problem is, that I have…
Dar Ben-Tov
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- 7
0
votes
1 answer
Django Rest Framework list_route and queryset on tree structure
Trying to display hierarchy of categories through DRF serializer and it fails
GET /api/mobile/v1/categories/tree/ HTTP/1.1
Host: localhost:8000
Accept: application/json
Content-Type: application/json
Cache-Control: no-cache
Postman-Token:…
DmitrySemenov
- 9,204
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0
votes
1 answer
Django MPTT queryset for instances with children with a certain attribute
I'm using Django MPTT, with the model Foobar like this:
class Foobar(MPTTModel):
parent = TreeForeignKey('self', null=True, blank=True, related_name='children')
If I want to select all Foobars with children, I can do this:
[x for x in…
Flimm
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0
votes
1 answer
Django, detect if model field is inherited
I'd like to check if a model field is inherited, similar to Field.is_relation. Is there a way to tell?
I have a model that inherits from MPTTModel and I want a list of the attributes defined directly in the model but not in MPTTModel.
E.g.:
#…
James H.
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0
votes
1 answer
django-mptt show "no such column"
I used MPTT to implement a forum which allow posts to latest news.I can't solve this error: "no such column: news_comment.lft"
The app name is news.This is models.py:
from django.db import models
from mptt.models import MPTTModel,…
ross
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0 answers
Hide field when parent.level is lower then 5?
How can i hide a field "content", when parent level is lower then 5 in mptt.django ? I want edit a field when descendent is 5.
class Menu(MPTTModel):
name = models.CharField(max_length=50, blank=True, null=True)
content =…
Emil
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votes
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How to show only first level child when second level child doen't exists otherwise show second level child in django MPTT
I got following output from django-mptt tree:
Group-2
Ministry E
Division G
Division Z
Ministry F
Division I
Division J
Group-3
Ministry P
Division X
Division Y
Ministry Q
…
ohid
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0
votes
1 answer
django-mptt raises 'NoneType' object has no attribute 'tree_id' when saving node
Environment: python 2.7.10, Django 1.9.1, django-mptt 0.8.4
# models.py
class Foo(MPTTModel):
parent = TreeForeignKey('self', null=True, blank=True)
Error raises in:
getattr(self, opts.tree_id_attr) != getattr(parent, opts.tree_id_attr)
where…
Arthur Mullakhmetov
- 23
- 4
0
votes
0 answers
Django- How to get mptt children in template
The closest thing that I could find to my questions is this.
I have the following model:
class Specialty(models.Model):
name = models.CharField(max_length=128)
class Meta:
verbose_name_plural = 'Specialties'
def…
mjr
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0
votes
1 answer
Advanced URLs in Django
The task is to write two url patterns.
The first one will take a single argument , which can be any url with random depth:
test/dorogi/
or
test/foo/bar/as/deep/as/you/want
The second one will be the same as the first one, but with a number in…
Viktor
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votes
1 answer
Show select as a tree
How to show categories as a tree in Django admin using MPTT?
I made it show list of categories as a tree:
But it does not work when I try to create a new article:
How do I make it render select as a tree?
Here is my model:
# -*- coding: utf-8…
Viktor
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0
votes
1 answer
global name from django-mptt is not defined
So it must be something basic but I cant figure it out .
I am trying to use django-mptt just following the tutorial
created in models.py
@with_author
class Tree(MPTTModel):
name = models.CharField(max_length=50, unique=True)
parent…
Ilya Bibik
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0
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0 answers
get_family not returning entire family of root node in mptt
I am using django mptt for tree structure. I ma adding parent to any object while updating not creating any object as shown below .
user= User.objects.create(username='abc')
after some logics or steps when we are sure that it can be added as a…
user5594493
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