Evgenij LegotskojDec. 17, 2018, 11:51 p.m.

Django - Tutorial 041. Display images in the admin panel on the example of a user profile

To improve the ability to display information about users in the administrative panel of the site, implemented the ability to display user avatars, both in the special UserProfile model that has One-To-One relationship to the User model, and in the User model itself, it added an avatar display via inline form.

It looks like this:

List of user profiles

List of user profiles

Displaying avatars in user profile

Avatar in user profile

a list of users

a list of users

Avatar in displaying user information

Avatar in displaying user information

Implementation

UserProfile model

models.py

# method for indicating where to load avatars
def upload_to(instance, filename):
    return 'avatars/%s' % filename


class UserProfile(LikeDislikeRelationMixin, models.Model):

    # We indicate the relationship to the user model
    user = models.OneToOneField(User, on_delete=models.CASCADE)

    avatar = models.ImageField(
        verbose_name=_('Avatar'), upload_to=upload_to, null=True, blank=True
    )

    def __str__(self):
        return self.user.username

    # Here I return the avatar or picture with an owl, if the avatar is not selected
    def get_avatar(self):
        if not self.avatar:
            return '/static/images/owl-gray.svg'
        return self.avatar.url

    # method to create a fake table field in read only mode
    def avatar_tag(self):
        return mark_safe('<img src="%s" width="50" height="50" />' % self.get_avatar())

    avatar_tag.short_description = 'Avatar'

admin.py

Now let's see how to declare the administrative form for our UserProfile model.

class UserProfileAdmin(admin.ModelAdmin):
    list_display = ('avatar_tag', 'user') # As a field, specify the method that will return the picture tag in the list of user profiles.
    readonly_fields = ['avatar_tag'] # Be sure to read only mode
    fields = ('avatar_tag', 'user') # Specify the fields that need to be displayed in the administrative form

Модель User

With the user model will be a little easier. There is less information here.

admin.py

# Need inline form
class ProfileInline(admin.StackedInline):
    model = models.UserProfile # specify the profile model
    can_delete = False # prohibit removal
    fields = ('avatar_tag',) # Specify which field to display, again avatar tag
    readonly_fields = ['avatar_tag'] # Specify that this read only field

# Create your own form to display a user profile
class EUserAdmin(UserAdmin):
    # Specify what will be in the form of inline
    inlines = [
        ProfileInline 
    ]
    # modify the list of displayed fields to see the avatar with the other fields
    list_display = ('avatar_tag',) + UserAdmin.list_display

    # and also create a method for getting the avatar tag from the user profile
    def avatar_tag(self, obj):
        return obj.userprofile.avatar_tag()

Register all models in the administrative panel

admin.site.register(UserProfile, UserProfileAdmin)

admin.site.unregister(User)
admin.site.register(User, EUserAdmin)

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