model

How can I set two primary key fields for my models in Django?

Update Django 4.0 Django 4.0 documentation recommends using UniqueConstraint with the constraints option instead of unique_together. Use UniqueConstraint with the constraints option instead. UniqueConstraint provides more functionality than unique_together. unique_together may be deprecated in the future. class Hop(models.Model): migration = models.ForeignKey(‘Migration’) host = models.ForeignKey(User, related_name=”host_set”) class Meta: constraints = [ models.UniqueConstraint( fields=[‘migration’, ‘host’], name=”unique_migration_host_combination” ) … Read more

Model binding with nested child models and PartialViews in ASP.NET MVC

I would suggest you to use the EditorFor helper Model: public class EditableContent { public string SidebarLeft { get; set; } public string SidebarRight { get; set; } } public class Page { public EditableContent Content { get; set; } } Views/Home/Index.aspx: <%@ Page Language=”C#” MasterPageFile=”~/Views/Shared/Site.Master” Inherits=”System.Web.Mvc.ViewPage<ToDD.Models.Page>” %> <asp:Content ID=”Content1″ ContentPlaceHolderID=”TitleContent” runat=”server”> Home Page </asp:Content> … Read more

Incompatible Data Reader Exception From EF Mapped Objects

The message means that the results of the stored procedure do not contain a column named ValudationId. Double check your select statement and run it in SSMS to ensure that you’re bringing back that column. EDIT: Your procedure does not contain a select statement. You need to select the inserted identity value (using the scope_identity() … Read more

How to implement Active Record inheritance in Ruby on Rails?

Rails supports Single Table Inheritance. From the AR docs: Active Record allows inheritance by storing the name of the class in a column that by default is named “type” (can be changed by overwriting Base.inheritance_column). This means that an inheritance looking like this: class Company < ActiveRecord::Base; end class Firm < Company; end class Client … Read more

Django Pass Multiple Models to one Template

I ended up modifying @thikonom ‘s answer to use class-based views: class IndexView(ListView): context_object_name=”home_list” template_name=”contacts/index.html” queryset = Individual.objects.all() def get_context_data(self, **kwargs): context = super(IndexView, self).get_context_data(**kwargs) context[‘roles’] = Role.objects.all() context[‘venue_list’] = Venue.objects.all() context[‘festival_list’] = Festival.objects.all() # And so on for more models return context and in my urls.py url(r’^$’, IndexView.as_view(), name=”home_list” ),

Can Django automatically create a related one-to-one model?

Take a look at the AutoOneToOneField in django-annoying. From the docs: from annoying.fields import AutoOneToOneField class MyProfile(models.Model): user = AutoOneToOneField(User, primary_key=True) home_page = models.URLField(max_length=255) icq = models.CharField(max_length=255) (django-annoying is a great little library that includes gems like the render_to decorator and the get_object_or_None and get_config functions)