Text and Design

• 1. How to change ‘Django administration’ text?
• 2. How to set the plural text for a model?
• 3. How to create two independent admin sites?
• 4. How to remove default apps from Django admin?
• 5. How to add a logo to Django admin?
• 6. How to override Django admin templates?

Calculated fields

• 7. How to show calculated fields on listview page?
• 8. How to optimize queries in Django admin?
• 9. How to enable sorting on calculated fields?
• 10. How to enable filtering on calculated fields?
• 11. How to show “on” or “off” icons for calculated boolean fields?

Bulk and custom actions

• 12. How to add additional actions in Django admin?
• 13. How to export CSV from Django admin?
• 14. How to remove the delete selected action in Django admin?
• 15. How to add Custom Action Buttons (not actions) to Django Admin list page?
• 16. How to import CSV using Django admin?

Permissions

• 17. How to restrict Django admin to specific users?
• 18. How to restrict access to parts of Django admin?
• 19. How to allow creating only one object from the admin?
• 20. How to remove the ‘Add’/’Delete’ button for a model?

Multiple models and inlines

• 21. How to edit mutiple models from one Django admin?
• 22. How to add One to One relation as admin inline?
• 23. How to add nested inlines in Django admin?
• 24. How to create a single Django admin from two different models?

Listview Page

• 25. How to show larger number of rows on listview page?
• 26. How to disable django admin pagination?
• 27. How to add date based filtering in Django admin?
• 28. How to show many to many or reverse FK fields on listview page?

Changeview Page

• 29. How to show image from Imagefield in Django admin.
• 30. How to associate model with current user while saving?
• 31. How to mark a field as readonly in admin?
• 32. How to show an uneditable field in admin?
• 33. How to make a field editable while creating, but read only in existing objects?
• 34. How to filter FK dropdown values in django admin?
• 35. How to manage a model with a FK with a large number of objects?
• 36. How to change ForeignKey display text in dropdowns?
• 37. How to add a custom button to Django change view page?

Misc

• 38. How to get Django admin urls for specific objects?
• 39. How to add a model twice to Django admin?
• 40. How to override save behaviour for Django admin?
• 41. How to add a database view to Django admin?
• 42. How to set ordering of Apps and models in Django admin dashboard.

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Models used in this book

App entities

The models are:

class Category(models.Model):
    name = models.CharField(max_length=100)

    class Meta:
        verbose_name_plural = "Categories"

    def __str__(self):
        return self.name


class Origin(models.Model):
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name


class Entity(models.Model):
    GENDER_MALE = "Male"
    GENDER_FEMALE = "Female"
    GENDER_OTHERS = "Others/Unknown"

    name = models.CharField(max_length=100)
    alternative_name = models.CharField(
        max_length=100, null=True, blank=True
    )


    category = models.ForeignKey(Category, on_delete=models.CASCADE)
    origin = models.ForeignKey(Origin, on_delete=models.CASCADE)
    gender = models.CharField(
        max_length=100,
        choices=(
            (GENDER_MALE, GENDER_MALE),
            (GENDER_FEMALE, GENDER_FEMALE),
            (GENDER_OTHERS, GENDER_OTHERS),
        )
    )
    description = models.TextField()

    def __str__(self):
        return self.name

    class Meta:
        abstract = True


class Hero(Entity):

    class Meta:
        verbose_name_plural = "Heroes"

    is_immortal = models.BooleanField(default=True)

    benevolence_factor = models.PositiveSmallIntegerField(
        help_text="How benevolent this hero is?"
    )
    arbitrariness_factor = models.PositiveSmallIntegerField(
        help_text="How arbitrary this hero is?"
    )
    # relationships
    father = models.ForeignKey(
        "self", related_name="+", null=True, blank=True, on_delete=models.SET_NULL
    )
    mother = models.ForeignKey(
        "self", related_name="+", null=True, blank=True, on_delete=models.SET_NULL
    )
    spouse = models.ForeignKey(
        "self", related_name="+", null=True, blank=True, on_delete=models.SET_NULL
    )


class Villain(Entity):
    is_immortal = models.BooleanField(default=False)

    malevolence_factor = models.PositiveSmallIntegerField(
        help_text="How malevolent this villain is?"
    )
    power_factor = models.PositiveSmallIntegerField(
        help_text="How powerful this villain is?"
    )
    is_unique = models.BooleanField(default=True)
    count = models.PositiveSmallIntegerField(default=1)

App events

The models are:

class Epic(models.Model):
    name = models.CharField(max_length=255)
    participating_heroes = models.ManyToManyField(Hero)
    participating_villains = models.ManyToManyField(Villain)


class Event(models.Model):
    epic = models.ForeignKey(Epic, on_delete=models.CASCADE)
    details = models.TextField()
    years_ago = models.PositiveIntegerField()


class EventHero(models.Model):
    event = models.ForeignKey(Event, on_delete=models.CASCADE)
    hero = models.ForeignKey(Hero, on_delete=models.CASCADE)
    is_primary = models.BooleanField()


class EventVillain(models.Model):
    event = models.ForeignKey(Event, on_delete=models.CASCADE)
    hero = models.ForeignKey(Villain, on_delete=models.CASCADE)
    is_primary = models.BooleanField()

 Previous

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42. How to set ordering of Apps and models in Django admin dashboard.

Django, by default, orders the models in admin alphabetically. So the order of models in Eventadmin is Epic, EventHero, EventVillain, Event

Instead you want the order to be

• EventHero, EventVillain, Epic then event.

The template used to render the admin index page is admin/index.html and the view function isModelAdmin.index.

def index(self, request, extra_context=None):
    """
    Display the main admin index page, which lists all of the installed
    apps that have been registered in this site.
    """
    app_list = self.get_app_list(request)
    context = {
        **self.each_context(request),
        'title': self.index_title,
        'app_list': app_list,
        **(extra_context or {}),
    }

    request.current_app = self.name

    return TemplateResponse(request, self.index_template or
        'admin/index.html', context)

The method get_app_list, set the order of the models.:

def get_app_list(self, request):
    """
    Return a sorted list of all the installed apps that have been
    registered in this site.
    """
    app_dict = self._build_app_dict(request)

    # Sort the apps alphabetically.
    app_list = sorted(app_dict.values(), key=lambda x: x['name'].lower())

    # Sort the models alphabetically within each app.
    for app in app_list:
        app['models'].sort(key=lambda x: x['name'])

    return app_list

So to set the order we override get_app_list as:

class EventAdminSite(AdminSite):
    def get_app_list(self, request):
        """
        Return a sorted list of all the installed apps that have been
        registered in this site.
        """
        ordering = {
            "Event heros": 1,
            "Event villains": 2,
            "Epics": 3,
            "Events": 4
        }
        app_dict = self._build_app_dict(request)
        # a.sort(key=lambda x: b.index(x[0]))
        # Sort the apps alphabetically.
        app_list = sorted(app_dict.values(), key=lambda x: x['name'].lower())

        # Sort the models alphabetically within each app.
        for app in app_list:
            app['models'].sort(key=lambda x: ordering[x['name']])

        return app_list

The code app['models'].sort(key=lambda x: ordering[x['name']]) sets the fixed ordering. Your app now looks like this.

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41. How to add a database view to Django admin?

You have a database view, created as this:

create view entities_entity as
    select id, name from entities_hero
    union
    select 10000+id as id, name from entities_villain

It has all the names from Hero and Villain. The id’s for Villain are set to 10000+id as id because we don’t intend to cross 10000 Heroes:

sqlite> select * from entities_entity;
1|Krishna
2|Vishnu
3|Achilles
4|Thor
5|Zeus
6|Athena
7|Apollo
10001|Ravana
10002|Fenrir

Then you add a managed=False model:

class AllEntity(models.Model):
    name = models.CharField(max_length=100)

    class Meta:
        managed = False
        db_table = "entities_entity"

And add it to admin.:

@admin.register(AllEntity)
class AllEntiryAdmin(admin.ModelAdmin):
    list_display = ("id", "name")

And your admin looks like this

Next  Previous