Polymorphic models like rails in Django? [closed]

stackoverflow.com - 2011-03-29 16:31:20 - Similar - Report/Block

rails models by declare :polymorphic => true i could using that as Polymorphic model.. But how can i create polymorphic model in Django I know it's not just simple like doing in rails but i need some introduction for doing this in Django...

Django - Polymorphic Models or one big Model?

stackoverflow.com - 2013-05-01 00:14:00 - Similar - Report/Block

I'm currently working on a model in Django involving one model that can have a variety of different traits depending on what kind of object it is. So, let's say we have a model called Mammal, which can either be an Elephant or a Dolphin (with their own traits "tusk_length" and "flipper_length" respectively). Basic OOP principles shout "po...

Routing Polymorphic Requests Rails

stackoverflow.com - 2013-04-05 04:06:49 - Similar - Report/Block

In rails 3, I have several polymorphic models such as Image and Comment , so my question is, When someone makes a request to Create/Update/Destroy a polymorphic object, should the request go to a single controller for the polymorphic object CommentController , or should the request be routed to the controller of the polymorphic accessor...

Rails upload form with carrierwave and polymorphic associations

stackoverflow.com - 2013-04-13 17:07:49 - Similar - Report/Block

I'm trying to wrap my head around using polymorphic associations to make file management less repetitive in a simple rails app. I'm using carrierwave to handle the file uploading. Here's what I have so far: app/uploaders/file_uploader.rb class FileUploader < CarrierWave::Uploader::Base def store_dir "uploads/#{model.class.to_s.underscor...

How can I define a polymorphic relation between models in Django?

stackoverflow.com - 2009-01-06 10:12:17 - Similar - Report/Block

I am working on a Django application which contains an Offer model. An Offer instance contains the pricing conditions and points to a product definition. The product model is actually a hierarchy (I have a Television model, a Camcorder model, etc.). So I would like the Offer model to contain a polymorphic (or "generic") association to poi...

How to assign a Unique Level Assessment on Has-Many Relation, Rails

stackoverflow.com - 2012-09-10 21:08:09 - Similar - Report/Block

So I'm trying to come up with a smart/the best rails way to do this, and would appreciate discussing with SO users the best method. Essentially I have two models, let's call the first a Photo and the second an Attribute. A photo has_many attributes (as examples, let's give saturation, color, warmth etc..). The Attribute model carries and...

Django indirect generic relation

stackoverflow.com - 2012-03-01 22:51:48 - Similar - Report/Block

I've been trying to implement a tagging system for my application, where only certain tags are allowed for each content type. I've tried setting the content type on the Tag model, and using this value on the TagAttribution model, and have got... interesting results. Code: from django.db import models from django.contrib.contenttypes.model...

Python/Django models

stackoverflow.com - 2013-03-24 00:51:03 - Similar - Report/Block

I am fairly new to Python/Django. What I would like to do is to store descriptions of cars separately, but simultaneously I would like to label (in django admin) car description like this: class CarDescription(models.Model): length = models.IntegerField(max_length=10) def __unicode__(self): return "description of the car no %d" % (Car.

Django form with list of foreign key fields

stackoverflow.com - 2012-05-20 12:57:15 - Similar - Report/Block

I have the below models for which I'm trying to create a form for: class Letter(models.Model): title = models.CharField(max_length=100) publish_date = models.TimeField() class LetterRecipients(models.Model): letter = models.ForeignKey(Letter) recipient_name = models.CharField(max_length=200) recipient_rating = models.IntegerField()...

Polymorphic has_many: through in rails

stackoverflow.com - 2012-03-27 19:37:42 - Similar - Report/Block

I have a tags model that I'd like to be polymorphic, but I don't want five records for a tag of "video" for example, I want to create the tag once and be able to use it on a variety of models. I've ready some of the questions here about doing that, but I'm not quite getting how to make it work. So I've got: class Tag < ActiveRecord::Ba...

Should we use the abstracted rails polymorphic migration syntax?

stackoverflow.com - 2012-03-30 19:46:58 - Similar - Report/Block

There are two ways to write a polymorphic migration in Rails. Generally, I've done this: class CreateFeatures < ActiveRecord::Migration def change create_table :features do |t| t.integer :featureable_id t.string :featurable_type t.timestamps end end However, we can also do this: class CreateFeatures <...

the right place to keep my signals.py files in django

stackoverflow.com - 2011-08-19 00:53:22 - Similar - Report/Block

based on the documentation i was reading from django site, It seems like signals.py in the app folder is a good place to start with, but the problem am facing is that when I create signals for pre_save and I try to import the class from model, it conflicts with the import operation for task in model. see my code below model.py from django...

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Django NameError: name 'models' is not defined

stackoverflow.com - 2012-05-06 06:08:01 - Similar - Report/Block

I have a small application that I wrote in python. Did some research on some web frameworks and decided to use django. I'm reading through the manual and going step by step to learn as much, however I'm stuck on the example given on page 19. When I type the command an I get and error. import datetime from django.utils import timezone # ..

JQuery file upload with Django on Appengine

stackoverflow.com - 2012-04-18 04:44:48 - Similar - Report/Block

I'm using this plugin to upload multiple files with jquery, and this project is for Django, but now I'm trying to use App Engine datastore. I had success deploying and it works until I try to upload, an error message shows in server log: ValueError: The App Engine storage backend only supports BlobstoreFile instances or File instances w...

Could Django project directory more simple structure with or without South?

stackoverflow.com - 2012-05-14 05:21:39 - Similar - Report/Block

I'm a new comer to Django. However, I'm little confused on directory structure of Django,for instance I have to write so many models.py in different place which, presumably, will cause difficulty to maintain the project in future. I want to make it more like real MVC structure, with every model files in a models directory. Could it be pos...

Why does Python raise an exception when I save() a model instance into a MongoDB database?

stackoverflow.com - 2012-04-15 04:08:18 - Similar - Report/Block

I've been using this tutorial to experiment and start up my first Django app using MongoDB. In the tutorial, they build a simple Post class as follows: from django.db import models from djangotoolbox.fields import ListField class Post(models.Model): title = models.CharField() text = models.TextField() tags = ListField() comments = Li...

How to add model forms by Django in Google app engine?

stackoverflow.com - 2012-02-24 20:55:05 - Similar - Report/Block

Since Python 2.7 does not support djangoform.modelform, but support numpy, I have to update my codes from Python 2.5 to 2.7. However, I met some problems when I was trying to add a form by Django.forms.Modelform. I really appreciate for any comments and suggestion. I am using Python 2.7, GAE 1.6.2 and Django 1.2. Here is the code (code 1)...

Django models inheritance and Meta class

stackoverflow.com - 2013-04-26 13:26:13 - Similar - Report/Block

I have a problem with django models inheritance. This is what I have : class Room(models.Model): name = models.CharField(max_length=32) class Container(models.Model): size = models.IntegerField(default=10) ... class BigBox(Container): room = models.ForeignKey(Room) ... class SmallBox(Container): big_box = models.ForeignKey(BigBox)...

Remove duplicates from django list_filter

stackoverflow.com - 2012-05-18 18:49:02 - Similar - Report/Block

I'm using a list filter in django admin on a field in a related object. class A(models.Model): #.. pass class B(models.Model): fk = models.ForeignKey(A) val models.CharField(max_length=1) In the admin for , I'm trying to list_filter B__val , but the result is duplicate 's listed for each satisfying the filter value. Is there an easy...

Examples and advices on combining a Polymorphic Association and a Single Table Inheritance

stackoverflow.com - 2011-05-05 09:56:57 - Similar - Report/Block

I am using Ruby on Rails 3 and I would like to know a real world example (or more) and some advice on when I should\can\must use the combination of a Polymorphic Association and a Single Table Inheritance as implemented here at the Polymorphic Association paragraph...

Extend the social_auth User model in Django

stackoverflow.com - 2012-05-12 15:07:57 - Similar - Report/Block

I'm using Django-social-auth for the first time, and it seems that all the new users are registered in the User's model of the social_auth app of my Django website. I have a different model called Users which has some specific data (related to the users activity in the site and relation with other entities) and I want to put the data fetc...

Model an undirected graph in Rails?

stackoverflow.com - 2011-11-02 05:45:45 - Similar - Report/Block

Importing the language of graph databases , understand nodes represented by circles edges represented by arrows ), and properties metadata of nodes / edges The graphic (courtesy of wikipedia) describes a directed graph What's the best way to model an undirected graph in Rails? That is to say, a graph where all edges are reciprocal ( as i...

Django model migrate two tables

stackoverflow.com - 2012-03-20 17:32:41 - Similar - Report/Block

I have a review site, writen in Django,.. How can I migrate a model to obtain review data - I have a product class and a vendor class, and finaly a review class with review for both products and vendors: class Product(models.Model): .... class Vendor(models.Model): .... class Review(models.Model): slug = models.SlugField(max_l...

django record logging using signal or overwrite save method?

stackoverflow.com - 2013-03-21 05:26:21 - Similar - Report/Block

I'm looking for a better way to record every changes to models. here is my log model,copy from django's admin. class LogEntry(models.Model): action_time = models.DateTimeField(_('action time'), auto_now=True) user = models.ForeignKey(User,related_name="act ions") content_type = models.ForeignKey(ContentType, blank=True, null=True,relate...

Django query with simple arithmetic among model fields and comparison with field from another model

stackoverflow.com - 2013-03-23 11:11:34 - Similar - Report/Block

(All code below is a simplified representation of the actual code). If I have the following Django models: - class Material(models.Model): name = models.CharField(max_length=110) class OrderDetail(models.Model): material = models.ForeignKey(Material) order_quantity = models.IntegerField() quantity_delivered = models.IntegerField(null=...

Rails URL Access

stackoverflow.com - 2012-07-10 18:01:59 - Similar - Report/Block

I'm new to Ruby on Rails, so please pardon my ignorance. My issue is that I cannot access the Rails project from the browser. I assume it has something to do with the Rails config, but I am having no luck so far. State of the Project I have existing logic (controllers, models, migrations, ...). If I leave index.html in place, I see the Ra...

Luis Bacalov - Django

tekstovi-pesama.com - 2013-04-26 12:04:46 - Similar - Report/Block

Django!Django, have you always been alone?Django!Django, have you never loved again?Love will live on, oh oh oh...Life must go on, oh oh oh...For you cannot spend your life regreatting.Django!Django,... Detaljnije pogledajte na sajtu...

When to programmatically create custom Django permissions?

stackoverflow.com - 2012-04-08 16:53:59 - Similar - Report/Block

The permission/authentication documentation for Django 1.4 provides the following snippet for creating custom permissions programmatically: Edit: (I would like to employ this for permissions that are necessarily linked to a specific model class, but more general permissions that span multiple types.) from django.contrib.auth.models impo...

Rails 3: Devise user with Polymorphic association for different user profiles

stackoverflow.com - 2013-03-01 19:52:36 - Similar - Report/Block

I have a Rails app. I installed Devise. I want to have a polymorphic association between the User model and the different profiles, for example: Student and Mentor. This is what I'm trying to do: have a student registration page with the regular devise fields such as: email password password_confirmation . But I also want to have fields s...

How to query the object which has manytomany field point to them in django

stackoverflow.com - 2013-06-12 00:31:24 - Similar - Report/Block

I have two models User and Company class Company(models.Model): name = models.CharField max_length=50) class User(models.Model): name = models.CharField( max_length=40) following = models.ManyToManyField(Company) I want to get all the company which has some users are following them. Something like Company.objects.filter(has_following =...

NameError django send_mail

stackoverflow.com - 2012-05-14 02:48:30 - Similar - Report/Block

Why am I getting a NameError: global name 'send_mail' is not defined From my models.py: from django.template import Context, loader from django.utils.translation import ugettext as _ from django.core.mail import send_mail ....... class Payment(models.Model): # send email for payment # 1. render context to email template email_template...

Rails include module in model trouble

stackoverflow.com - 2012-07-10 22:16:47 - Similar - Report/Block

I have module in /lib/models/scopes.rb module Models module Scopes extend ActiveSupport::Concern ... end I'm trying to include it from model: class User < ActiveRecord::Base include Models::Scopes And getting error: NameError: uninitialized constant User::Models How to solve this trouble? Maybe it`s wrong to keep this types of fil...

Rails polymorphic / single-table-inheritance models, select type in form

stackoverflow.com - 2012-07-22 21:45:19 - Similar - Report/Block

Update: After thinking about this some more I think this question includes both polymorphism and STI. Let's say I have an abstract base model called "Vehicle", and I have two models that inherit from this, "Car" and "Truck". These reside in the Vehicles table. The reason I intend to use STI is that all vehicles will inherit some common l...

Django FileField: how to set default value (auto-create empty file)?

stackoverflow.com - 2010-07-11 20:03:37 - Similar - Report/Block

I've got a model like this: class MyModel(models.Model): name = models.CharField(max_length=255) code = models.FileField() When a new MyModel is submitted, I want to allow for the field to be left empty, in which case I need Django to create an empty file (with arbitrary name). Question is: what is the right way to do it? I coul...

Rails 3 HABTM one-liner

stackoverflow.com - 2011-08-02 10:11:50 - Similar - Report/Block

I need a one-liner to generate a has_and_belongs_to_many join table or else I will go back to Django for its simpler many-to-many constructs. rails 3 generate model article_tags [..] Models # article.rb has_many :articles_tags has_many :tags, :through => :articles_tags # tag.rb has_many :articles_tags has_many :articles, :through =>...

django how do i find my project name?

stackoverflow.com - 2012-06-24 18:35:55 - Similar - Report/Block

i have a pycharm project and, presumably, a django project. Perhaps they are one and the same, perhaps not - i'm unsure as to the distinction. Anyway, in my settings.py folder (which is in the base of the project directory, which is what i presume is my pycharm project) i have: ROOT_URLCONF = 'dumpstown.urls' does that mean dumpstown is...

Extending Django User for Permission

stackoverflow.com - 2012-04-25 06:54:09 - Similar - Report/Block

I just want List user to be under permission , so i just made one custom model like below from django.db import models from django.contrib.auth.models import Permission,User class Mycustomuser(User): class Meta: permissions = ( ('users','users'), ('view_user', 'View user'), ) In views i simply called items=Mycustomuser.objects.all()...

django.contrib.admin javascript multiple file upload

stackoverflow.com - 2012-04-06 00:37:05 - Similar - Report/Block

I'm not very experienced in django and got stuck ad a point, that might be a common thing. I'm workin on an image app. Registered authors should be able to create a gallery and upload multiple images for it. First I decided to use uploadify. This is how my models look: class Location(models.Model): name = models.CharField(max_length =...

Rails 3.1 ckeditor

stackoverflow.com - 2011-08-04 23:01:47 - Similar - Report/Block

So I just tried to install ckeditor in rails, however it doesn't look like its working. Here is what I did added these lines to my gemfile gem "ckeditor", "~> 3.6.0" gem "paperclip" Then bundled installed and ran rails generate ckeditor:install rails generate ckeditor:models --orm=active_record Added this file tom config/application.rb...

Django-pagination for Django 1.4

stackoverflow.com - 2012-06-07 23:54:43 - Similar - Report/Block

The docs for django-pagination are out of date for 1.4. When following them, I don't receive errors but the pagination doesn't work. The pagination page counter loads, but there is no pagination. Here is what I have: settings.py here: TEMPLATE_CONTEXT_PROCESSORS = ( "django.contrib.auth.context_processors. auth", "django.core.context_proce...


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