Question

我有一个充满城市的Django数据库。我想使用Django管理面板将每个城市的多张图片上传到我的服务器，例如/ images / country_name / state / city /。这可能会添加到城市管理员表单中，因此图像和信息都可以在一个页面上进行编辑。我还需要选择主图像并将其转换为缩略图，以便可以在搜索结果中使用。有哪些实现此类功能的好方法？有没有好的django插件可以帮助我完成这些任务？

Answer 1

你可以做几个相互关联的模型，并在django-admin中将图像添加为TabularInline，如：

# models.py
class City(models.Model):
    # your fields

class CityImage(models.Model):
    city = models.ForeignKey('City', related_name='images')
    image = models.ImageField(upload_to=image_upload_path)

# admin.py
from django.contrib import admin
from myapp.models import City, CityImage


class CityImageInline(admin.TabularInline):
    model = CityImage


class CityAdmin(admin.ModelAdmin):
    inlines = [CityImageInline]


admin.site.register(City, CityAdmin)

对于缩略图，您需要在City模型中确定要将哪些相关图像用作缩略图，然后执行以下操作：

import Image
try:
    from cStringIO import StringIO
except ImportError:
    from StringIO import StringIO
from django.core.files.base import ContentFile

# other imports and models

class City(models.Model):
    # your fields

    def get_thumbnail(self, thumb_size=None):
        # find a way to choose one of the uploaded images and
        # assign it to `chosen_image`.
        base = Image.open(StringIO(chosen_image.image.read()))  # get the image

        size = thumb_size
        if not thumb_size:
            # set a default thumbnail size if no `thumb_size` is given
            rate = 0.2  # 20% of the original size
            size = base.size
            size = (int(size[0] * rate), int(size[1] * rate))

        base.thumbnail(size)  # make the thumbnail
        thumbnail = StringIO()
        base.save(thumbnail, 'PNG')
        thumbnail = ContentFile(thumbnail.getvalue())  # turn the tumbnail to a "savable" object
        return thumbnail

我希望这会派上用场！：）

在Django Admin中上传图像

1 个答案: