from django.db import models
from django.contrib import admin

class Section(models.Model):
    """
    A simple section that links to articles, to test linking to related items 
    in admin views.
    """
    name = models.CharField(max_length=100)

class Article(models.Model):
    """
    A simple article to test admin views. Test backwards compatibility.
    """
    content = models.TextField()
    date = models.DateTimeField()
    section = models.ForeignKey(Section)

class ArticleAdmin(admin.ModelAdmin):
    list_display = ('content', 'date')
    list_filter = ('date',)
    
    def changelist_view(self, request):
        "Test that extra_context works"
        return super(ArticleAdmin, self).changelist_view(
            request, extra_context={
                'extra_var': 'Hello!'
            }
        )

class CustomArticle(models.Model):
    content = models.TextField()
    date = models.DateTimeField()

class CustomArticleAdmin(admin.ModelAdmin):
    """
    Tests various hooks for using custom templates and contexts.
    """
    change_list_template = 'custom_admin/change_list.html'
    change_form_template = 'custom_admin/change_form.html'
    object_history_template = 'custom_admin/object_history.html'
    delete_confirmation_template = 'custom_admin/delete_confirmation.html'
    
    def changelist_view(self, request):
        "Test that extra_context works"
        return super(CustomArticleAdmin, self).changelist_view(
            request, extra_context={
                'extra_var': 'Hello!'
            }
        )

class ModelWithStringPrimaryKey(models.Model):
    id = models.CharField(max_length=255, primary_key=True)
    
    def __unicode__(self):
        return self.id
        
admin.site.register(Article, ArticleAdmin)
admin.site.register(CustomArticle, CustomArticleAdmin)
admin.site.register(Section)
admin.site.register(ModelWithStringPrimaryKey)