In regards to displaying a foreign key field in a form you can use theforms.ModelChoiceFieldand pass it a queryset. so, forms.py: classDocumentForm(forms.ModelForm):classMeta: model = Documentdef__init__(self, *
By default, each Field class assumes the value is required, so if you pass an empty value – either None or the empty string ("")– then clean() will raise a ValidationError exception: >>> from django import forms >>> f = forms.CharField() >>> f.clean("foo") 'foo' >>> f.cl...
如何在Django中使用ForeignKey的to_field来指定关联字段? ForeignKey的to_field可以用来关联非主键字段吗? 在Django中,ForeignKey是一种关系字段,用于在模型之间建立一对多的关联关系。它允许一个模型中的字段引用另一个模型的主键字段。 to_field参数是ForeignKey字段的一个可选参数,用于指定被引用模型的字段作为关联字段,...
By default, each Field class assumes the value is required, so if you pass an empty value – either None or the empty string ("")– then clean() will raise a ValidationError exception: >>> from django import forms >>> f = forms.CharField() >>> f.clean('foo') 'foo' >>> f.cl...
forms.py fromdjangoimportformsfrom.modelsimportCountry,CityclassCountryCityForm(forms.ModelForm):country=forms.ModelChoiceField(queryset=Country.objects.all(),required=True)city=forms.ModelChoiceField(queryset=City.objects.all(),empty_label=None,required=True)classMeta:model=Cityexclude=("name",)def_...
('status', <django.forms.fields.TypedChoiceField object at 0x000002139692CCC0>)]), '_bound_fields_cache': {'status': <django.forms.boundfield.BoundField object at 0x0000021396AC37B8>}, 'renderer': <django.forms.renderers.DjangoTemplates object at 0x0000021396AD43C8>, 'cleaned_data': {...
(4)Form中的钩子对每个field进行验证,其实就是调用django保留的clean_"field_name"方法 from django.core.exception import ValidationError class RegisterForm(forms.Form): user = fields.CharField() email = fields.EmailField() def clean_user(self): #对user字段进行验证 c = models.UserInfo.objects.filter...
models.TextField() class TaskPriority(models.Model): priority_id = models.AutoField(primary_key=True) task_priority_name = models.CharField(max_length=200) def __str__(self): return str(self.task_priority_name) class Project(models.Model): project_id = models.AutoField(primary_key=True)...
数字型字段DecimalField max_digits:数字允许的最在位数 decimal_places:小数的最大位数 时间日期类型字段 auto_now_add:默认为False,设置为True自动添加创建时间 auto_now:默认为False,设置为True自动添加修改时间 4.2 常用字段参数 4.3 Meta类 # explame ...
(max_length=n,default="默认值",primary_key=True/False,blank=True/False, null=True/False,verbosename=u"管理界面中显示",unique=True/False) EmailField(verbose_name=u"管理界面显示") ImageField(upload_to="一个媒体文件夹",default="默认头像",max_length=100) ...