在Django的ImageField中使用height_field和width_field属性 [英] Using height_field and width_field attribute in ImageField of Django

问题描述

我有一个模型

class Anh_chi_tiet(models.Model):
    du_an       = models.ForeignKey(Du_an)
    title       = models.CharField(max_length=120)
    url         = models.ImageField(upload_to='images', height_field='50', width_field='100')
    url_detail  = models.ImageField(upload_to='images', height_field='200', width_field='400')

我总是会收到此错误：

'Anh_chi_tiet' object has no attribute '100'

似乎Django要求在同一张表Anh_chi_tiet中同时使用两个字段来保存height_field和width_field。

It seems Django require both the fields in the same table Anh_chi_tiet to save height_field and width_field.

如何直接设置这些值而无需在表中添加新字段？

How can I directly set these values without append new fields in my table?

推荐答案

height_field 代表模型的属性，用于存储高度。

height_field represents a property of your model which is used to store the height.

class Anh_chi_tiet(models.Model):

  url_height=models.PositiveIntegerField()
  url_width=models.PositiveIntegerField()
  url = models.ImageField(upload_to='images', height_field='url_height', width_field='url_width')

注意 height_field ='url_height'

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