[PYTHON] How to view images in Django's Admin

On the Django management site, there was a case that "If the image can be displayed on the list screen, it would be good work efficiency", but when I checked it, it was very easy, so I will record it as Tips.

I'm a little sorry that Qiita has only a little simple information, but Django is often filled with Stack Overflow even if you do a Google search, so there is little information that hits in Japanese, so it is useful for someone I think it may be posted.

For this article, we have confirmed the operation with Django 1.8.

What you want to do

How to write

I'll write it as a continuation of my book How to use ManyToManyField with Django's Admin.

As shown below, define a method (ʻadmin_og_image) with an arbitrary name that returns the file path of the image in models.py, and set ʻallow_tags = True.

models.py

@@ -11,9 +11,18 @@ class Article(models.Model):
     title = models.CharField(max_length=100)
     author = models.ForeignKey(Author, blank=True, null=True)
     meta = models.ManyToManyField('Tag')
-
+    og_image = models.ImageField(default='')
+    
     def __unicode__(self):
         return self.title
+    
+    def admin_og_image(self):
+        if self.og_image:
+            return '<img src="{}" style="width:100px;height:auto;">'.format(self.og_image)
+        else:
+            return 'no image'
+        
+    admin_og_image.allow_tags = True

Then add the method name to list_display in admin.py and you're done.

admin.py

@@ -3,7 +3,7 @@ from django.contrib import admin
 from .models import Author, Article, Tag
 
 class ArticleAdmin(admin.ModelAdmin):
-    list_display = ('title', 'author', '_meta')
+    list_display = ('title', 'author', '_meta', 'admin_og_image')

Supplement

In addition, it is also possible to write it completely with only admin.py, in which case it is OK if you write as follows.

models.py

@@ -11,9 +11,18 @@ class Article(models.Model):
     title = models.CharField(max_length=100)
     author = models.ForeignKey(Author, blank=True, null=True)
     meta = models.ManyToManyField('Tag')
-
+    og_image = models.ImageField(default='')
+    

admin.py

@@ -3,11 +3,19 @@ from django.contrib import admin
 from .models import Author, Article, Tag
 
 class ArticleAdmin(admin.ModelAdmin):
-    list_display = ('title', 'author', '_meta')
+    list_display = ('title', 'author', '_meta', 'admin_og_image')
 
     def _meta(self, row):
         return ','.join([x.name for x in row.meta.all()])
 
+    def admin_og_image(self, row):
+        if row.og_image:
+            return '<img src="{}" style="width:100px;height:auto;">'.format(row.og_image)
+        else:
+            return 'no image'
+        
+    admin_og_image.allow_tags = True
+