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
What went wrong with my django-mptt tree?
I'm using django-mptt 0.4.2 and have trouble with one of my data trees.
Here is the tree as seen in mysql;
mysql> select id, lft,rght,level from my_object where tree_id=30613;
+-------+-----+------+-------+
| id | lft | rght | level…
Hobhouse
- 15,463
- 12
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0
votes
1 answer
Problem with get_children() method when using TreeManager. Wrong result
I have encountered an strange problem with the use of TreeManager
Here is my code:
# other imports
from mptt.models import MPTTModel, TreeForeignKey
from mptt.managers import TreeManager
class SectionManager(TreeManager):
def…
jcuot
- 935
- 9
- 24
0
votes
1 answer
How should I structure a tree of multiple model types?
I'm trying to model television shows down to the episode level. Given that each level of the tree (network, series, season, episode) has different fields, I want to use different model types for each level.
My initial approach was to keep track of…
John Tacos
- 167
- 4
0
votes
1 answer
django-mptt's MPTTModel inheritance issue
Met unexpected behaviour with model inheritance.
I launch this code in django shell:
import mptt
from django.db import models
class MyTreeQuerySet(mptt.querysets.TreeQuerySet):
pass
class MyTreeManager(
…
Andre Zakharov
- 11
- 4
0
votes
1 answer
Django: Many2Many Relationship During Pre_Save Signal?
Let's assume we have the following class:
Class 'Config'
class Config(models.Model):
name = models.CharField(max_length=40, editable=True, blank=False, null=False)
nodes = models.ManyToManyField(HierarchyNode_MPTT)
element =…
DevKing
- 211
- 5
- 14
0
votes
1 answer
SQL query on Many to Many with intersection
I am working with django-categories which uses django-mptt under the hood. (That implicates db structure that I am using.)
I have some products:
product
--------
id | name
1 | Apple
2 | Orange
3 | Tomato …
d21d3q
- 365
- 2
- 10
0
votes
1 answer
django-MPTT drilldown template
I am having some trouble getting a drilldown for mptt in my template.
I have the following model.
models.py
class Dimension_value(MPTTModel):
name = models.CharField(max_length = 200, null=True, blank = True, default = '')
parent =…
JeePee
- 107
- 1
- 12
0
votes
1 answer
AttributeError: 'User' object has no attribute 'get_descendant_count' | django-mptt
Can someone help me to fix next problem. I use django-mptt application in my Django project. I want to make tree of related users. For this task I decided to create Profile model with next code.
from mptt.models import MPTTModel,…
Nurzhan Nogerbek
- 4,806
- 16
- 87
- 193
0
votes
0 answers
Adjusted local models, getting columns do not exist in production environment
I have a django blog project via PythonAnywhere using PostGres, and have recently tried to push my changes (mainly implementing Django-MPTT) to my models to my production server via git.
I have ran migrations etc, but when I load the site, I got a…
ML_Engine
- 1,065
- 2
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0
votes
3 answers
How to get all descendants of a node with Django mptt?
I would like my categories to show all items in that category including descendant categories, so the parent category contains all items for subcategories.
I have tried adding this method to my Category class in models.py
def…
rcomiskey
- 63
- 9
0
votes
1 answer
django admin nested inlines with mptt children
I'm trying to figure out if it's possible to create a ModelAdmin with multiple nested inlines like:
Contract
Mainproduct
Subproduct1
Subproduct2
SubSubproduct
And I'm also trying to solve the models with mptt.
My models are looking like…
akephalos
- 13
- 3
0
votes
1 answer
Django-mptt different order based on level
I'm trying to make a threaded commenting system based on django-mptt.
The problem that I'm having is that the order of the comments cannot be changed according to their level.
What I am trying to achieve is a system in which "first level comments"…
filippo.ciceri
- 61
- 6
0
votes
1 answer
Different models in django-template
I'm very new in Django and couldn't find solution for this. How can I pass 2 querysets from different models in 1 template? I use mptt categories and stack with it for awhile. I know that I have to make something with views.py but how can I combine…
V. Khud
- 35
- 1
- 5
0
votes
1 answer
While trying to post mptt model via django rest framework getting ValueError: Cannot use None as a query value
Here is the view I'm trying to write tests for:
class RestaurantsTreeView(generics.ListCreateAPIView):
serializer_class = RestarauntsTreeSerializer
def get_serializer_class(self):
from rest_framework import serializers
if…
Vassily
- 5,263
- 4
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- 63
0
votes
1 answer
Django-mptt admin get child categories
I have next models in my Django project:
class Category(MPTTModel):
title_of_category = models.CharField(max_length=50, unique=True, verbose_name='Subcategory', default='')
parent = TreeForeignKey('self', null=True, blank=True,…
Just Snake
- 541
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