add media backend

app/media/admin.py

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+from django.contrib import admin
+
+from . import models
+
+
+@admin.decorators.register(models.Image)
+class ImageAdmin(admin.ModelAdmin):
+    search_fields = ['file']
+    list_display = ('image_tag', 'file')
+    readonly_fields = ('image_tag', 'get_absolute_url')

app/media/apps.py

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+from django.apps import AppConfig
+
+
+class MediaConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'app.media'

app/media/migrations/0001_initial.py

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+# Generated by Django 4.0.4 on 2022-04-22 17:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Image',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('modified', models.DateTimeField(auto_now=True)),
+                ('file', models.ImageField(blank=True, null=True, upload_to='image')),
+            ],
+        ),
+    ]

app/media/models.py

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+from django.db import models
+from django.urls import reverse
+
+
+class Image(models.Model):
+    created = models.DateTimeField(auto_now_add=True)
+    modified = models.DateTimeField(auto_now=True)
+
+    file = models.ImageField(upload_to='image', null=True, blank=True)
+
+    def get_absolute_url(self):
+        return self.file.url
+    get_absolute_url.short_description = 'URL'
+
+    def image_tag(self):
+        from django.utils.html import mark_safe
+        return mark_safe('<img src="%s" style="max-width:256px" />' % self.get_absolute_url())
+    image_tag.short_description = 'Preview'
+
+    def __str__(self):
+        if self.file:
+            name = self.file.name.split('/')[-1]
+        else:
+            name = 'None'
+        return name

app/media/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

app/media/views.py

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+from django.shortcuts import render
+
+# Create your views here.