NameError:名称'ResidentialReference'未定义[Django - ImageKit]

Question

出于某种原因,一旦我尝试将ImageKit应用到模型上以创建ImageField的缩略图,我就会收到错误.我正在使用Django的ImageKit库,你可以在这里找到它

我的代码如下:

from django.db import models
from PIL import Image
import os
from django.contrib import admin
from imagekit.models import ImageSpecField
from imagekit.processors import ResizeToFill

# Create your models here.
class ResidentialReference(models.Model):
    image = models.ImageField(upload_to='images', blank="true",null="true")
    thumbnail = ImageSpecField(source='image',
                               processors=[ResizeToFill(100,50)],
                               format='JPEG',
                               options={'quality':60})

    title = models.CharField(max_length = 1000, default = 'Title here...' )
    postcode = models.TextField(max_length = 1000, default='Postcode here...')
    description = models.TextField(max_length = 12000, default = 'Technical Description here...')
    equipment = models.TextField(max_length = 1000, default = 'Equipment here...')
    output = models.TextField(max_length = 1000, default = 'Rated Output here...')
    partnership = models.TextField(max_length = 12000, default = 'Viessmann partnership details here...')



    def __unicode__(self):
        return self.title

    def create_thumb(self):
        residentialReference = ResidentialReference.objects.all()[0]
        print residentialReference.thumbnail.url
        print residentialReference.thumbnail.width

Answer 1

此错误与ImageKit无关.

您正试图在自己的定义中引用该类.该类代码将在定义类时执行,此时不存在ResidentialReference.

将该代码放入一个方法中,或者将它完全从类中取出.