Django admin 中的多张图片上传

Question

我在尝试编写正确的模型以将多个图像上传到我的 Django 应用程序时遇到了很多麻烦。我希望能够通过 django 管理员上传这些图片。我曾尝试使用 ImageField，但它一次只允许一张图片，而且我还希望能够调整图像大小。

这是我的models.py：

class Lesson(models.Model):
    DRAFT = 'draft'
    PUBLISHED = 'published'

    CHOICES_STATUS = (
        (DRAFT, 'Draft'),
        (PUBLISHED, 'Published')
    )

    ARTICLE = 'article'
    QUIZ = 'quiz'

    CHOICES_LESSON_TYPE = (
        (ARTICLE, 'Article'),
        (QUIZ, 'Quiz')
    )

    course = models.ForeignKey(Course, related_name='lessons', on_delete=models.CASCADE)
    title = models.CharField(max_length=255)
    slug = models.SlugField()
    short_description = models.TextField(blank=True, null=True)
    long_description = models.TextField(blank=True, null=True)
    status = models.CharField(max_length=20, choices=CHOICES_STATUS, default=PUBLISHED)
    lesson_type = models.CharField(max_length=20, choices=CHOICES_LESSON_TYPE, default=ARTICLE)

Serializer.py：

class LessonListSerializer(serializers.ModelSerializer):
    class Meta:
        model = Lesson
        fields = ('id', 'title', 'slug', 'short_description', 'long_description')

Admin.py：

class LessonAdmin(admin.ModelAdmin):
    list_display = ['title', 'course', 'status', 'lesson_type']
    list_filter = ['status', 'lesson_type']
    search_fields = ['title', 'short_description', 'long_description']
    inlines = [LessonCommentInline]

Answer 1

如果您想要多个图像，则需要为图像创建另一个表（One2Many 关系）。

pip install --upgrade Pillow#如果需要

# import PIL for image resizing
from PIL import Image

class Photo(models.Model):
    lesson = models.ForeignKey(Lesson, on_delete=models.CASCADE, related_name='photos')
    photo = models.ImageField(upload_to ='photos/')

    # resizing the image, you can change parameters like size and quality.
    def save(self, *args, **kwargs):
       super(Photo, self).save(*args, **kwargs)
       img = Image.open(self.photo.path)
       if img.height > 1125 or img.width > 1125:
           img.thumbnail((1125,1125))
       img.save(self.photo.path,quality=70,optimize=True)

对于管理员，您可以这样做：

admin.py

class PhotoAdmin(admin.StackedInline):
    model = Photo

class LessonAdmin(admin.ModelAdmin):
    inlines = [PhotoAdmin]

    class Meta:
        model = Lesson


admin.site.register(Photo)
admin.site.register(Lesson, LessonAdmin)