Django - 如何使ImageField / FileField可选? [英] Django - how to make ImageField/FileField optional?
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问题描述
class Product(models.Model):
...
image = models.ImageField(upload_to = generate_filename,blank = True)
当我使用ImageField(blank = True)并且不要将图像选择为管理表单时,异常发生。
在django代码中,您可以看到这样:
类FieldFile(File):
....
def _require_file(self):
如果不是self:
raise ValueError('%s'属性没有与之关联的文件。 %self.field.name)
def _get_file(self):
self._require_file()
...
Django trac有关于这个问题的票证#13327,但似乎不能很快修复。如何使这些字段可选?
解决方案
设置 null = True
请参阅文档)
class Product(models.Model):
...
image = models.ImageField(upload_to = generate_filename,blank = True,null =真的)
class Product(models.Model):
...
image = models.ImageField(upload_to = generate_filename, blank = True)
When I use ImageField (blank=True) and do not select image into admin form, exception occures.
In django code you can see this:
class FieldFile(File):
....
def _require_file(self):
if not self:
raise ValueError("The '%s' attribute has no file associated with it." % self.field.name)
def _get_file(self):
self._require_file()
...
Django trac has ticket #13327 about this problem, but seems it can't be fixed soon. How to make these field optional?
解决方案
Set null=True
(see documentation)
class Product(models.Model):
...
image = models.ImageField(upload_to=generate_filename, blank=True, null=True)
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