Django如何使表单字段可选

In django how to make form field optional ?

在django中如何使表单字段可选?

my model,

class Student(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=40)
    email = models.EmailField()

5 个解决方案

#1

Presuming you want to make last_name optional, you can use the blank attribute:

假设您要使last_name可选,您可以使用blank属性:

class Student(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=40, blank=True)
    email = models.EmailField()

Note that on CharField and TextField, you probably don't want to set null (see this answer for a discussion as to why), but on other field types, you'll need to, or you'll be unable to save instances where optional values are omitted.

请注意,在CharField和TextField上,您可能不希望设置null(有关原因的讨论,请参阅此答案),但是对于其他字段类型,您需要,或者您将无法将实例保存在哪里可选值被省略。

#2

You use the required argument, sent in with a False value:

您使用必需参数,使用False值发送:

email = models.EmailField(required=False)

email = models.EmailField(required = False)

#3

If you want to allow blank values in a date field (e.g., DateField, TimeField, DateTimeField) or numeric field (e.g., IntegerField, DecimalField, FloatField), you’ll need to use both null=True and blank=True.

如果要在日期字段(例如,DateField,TimeField,DateTimeField)或数字字段(例如,IntegerField,DecimalField,FloatField)中允许空值,则需要同时使用null = True和blank = True。

#4

Use null=True and blank=True in your model.

在模型中使用null = True和blank = True。

#5

-1

class StudentForm(ModelForm):
    class Meta:
        model = Student
        exclude = ['first_name', ...]

#1