Welcome to Django Mptt Demo

Welcome to django mptt demo module this demo provides how to create tree level category and demonstration of mtpp library

Django Mtpp demo features

Create Tree level category
Display tree level category list in admin panel
Display category as tree in another db relation like forenkeyTree (example used in product model)

This demo demonstrate use of django-mptt model.

Go ahead and try:

$ git clone https://cyberkishor@bitbucket.org/cyberkishor/django-mptt-demo.git

Requirements

django-mptt

Here's an example of some Python code:

#!python
#models.py
from django.db import models
from mptt.models import MPTTModel, TreeForeignKey

from decimal import Decimal
from django.utils.translation import ugettext_lazy as _

# Create your models here.
class Category(MPTTModel):
    name = models.CharField(max_length=100, blank=False, unique=True)
    description = models.TextField(blank=True, null=True)

    parent = TreeForeignKey('self', null=True, blank=True, related_name='children', db_index=True)

    class MPTTMeta:
        order_insertion_by = ['name']

    class Meta:
        verbose_name_plural = u"Categories"

    def __str__(self):              # __unicode__ on Python 2
        return self.name


class Product(models.Model):
    code = models.CharField(max_length=50, primary_key=True)
    name = models.CharField(max_length=100, blank=True)
    category = TreeForeignKey('Category', null=True, blank=True, db_index=True)
    image = models.ImageField(upload_to='foto', height_field=None, width_field=None, max_length=100, blank=True, null=True)
    description = models.TextField(blank=True, null=True)
    stocks = models.IntegerField(default=0, blank=True)

    #PRICES
    priceAustria = models.DecimalField(max_digits=6, decimal_places=2, default=Decimal('0.00'), verbose_name="Recomended Price", blank=True, null=True)

    def __str__(self):              # __unicode__ on Python 2
        return self.name

    def image_img(self):
        if self.image:
            return u'<img src="%s" width="75" height="75" />' % (self.image.url)
        else:
            return '(No image)'
    image_img.short_description = 'Image'
    image_img.allow_tags = True

Now Copy and Peste inside admin.py

#!python
#admin.py

from django.contrib import admin

from mptt.admin import MPTTModelAdmin

from .models import Category, Product

# Register your models here.
class CategoryAdmin(MPTTModelAdmin):
    fields = ['name', 'description', 'parent']
    list_display = ('name', )

    mptt_level_indent = 15

admin.site.register(Category, CategoryAdmin)


class ProductAdmin(admin.ModelAdmin):
    ordering = ('code',)
    fieldsets = [
        (None, {'fields': ['code', 'stocks', 'image', 'category']}),
        (None, {'fields': ['name', 'description',]}),
        ('Prices', {'fields': ['priceAustria'], 'classes': ['grp-collapse  grp-closed']}),
    ]
    # change_list_template = 'admin/product_change_list.html'
    list_display = ('code', 'name', 'category')
    search_fields = ['code']

    list_filter = ('name',)


admin.site.register(Product, ProductAdmin)

Now inside view.py

#!python

#views.py
from django.shortcuts import render
from django.views.generic.list import ListView
import datetime
from .models import Category, Product
from .forms import CategoryForm

class CategoryListView(ListView):
    template_name = 'category_list.html'
    model = Category

    def get_context_data(self, **kwargs):
        context = super(CategoryListView, self).get_context_data(**kwargs)
        context['now'] = datetime.datetime.now()
        context['category_form'] = CategoryForm()
        context['products'] = Product.objects.all()
        return context

and need to setup template for display hierarchy inside the template:

#!html

#category_list.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Django Mtpp Demo | Category List</title>
</head>
<body>
    <h1>Category Tree</h1>
    {% load mptt_tags %}


    <ul>
        {% recursetree category_list %}
            <li>
                {{ node.name }}
                {% if not node.is_leaf_node %}
                    <ul class="children">
                        {{ children }}
                    </ul>
                {% endif %}
            </li>
        {% endrecursetree %}
    </ul>


    <h2>Category Tree Select </h2>

    <div class="category">
        <form action="." method="get"></form>
        {{ category_form.as_p }}

        <input type="submit" value="Go" />
    </div>

    <h2>Multiple Select</h2>

    <select name="classifiers" multiple="multiple" size="10">
        {% for node,structure in category_list|tree_info:"ancestors" %}
            {% if node.is_child_node %}
                <option value="{{ node.pk }}">
                    {{ structure.ancestors|tree_path }} :: {{ node }}
                </option>
            {% endif %}
        {% endfor %}
    </select>


</body>
</html>

For more detail : http://django-mptt.github.io/django-mptt/

Have fun!

Wiki

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Welcome to Django Mptt Demo

Django Mtpp demo features

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