This document is for an insecure version of Django that is no longer supported. Please upgrade to a newer release! 编写自定义模型字段(model fields)¶ 介绍¶ 字段参考文档介绍了如何使用 Django 的标准字段类——CharField,DateField,等
unique:数据唯一 unique_for_date:日期唯一,如下例中系统将不允许title和pub_date两个都相同的数据重复出现 title = meta.CharField(maxlength=30,unique_for_date=’pub_date’) unique_for_month / unique_for_year:用法同上 validator_list:有效性检查。非有效产生 django.core.validators.ValidationError 错误...
Also, unique_together certainly does work with FK fields, I use it frequently. So whatever problem you are having with your model, it is something else. Please use user-support channels (#django on Freenode, the django-users mailing list), and only file a ticket if you are sure that ...
fields 是 models中最重要,也是唯一的必须部分。注意避免跟models API重名了,例如clean, save等。 1fromdjango.dbimportmodels23classMusician(models.Model):4first_name = models.CharField(max_length=50)5last_name = models.CharField(max_length=50)6instrument = models.CharField(max_length=100)78classAlbum...
unique:如果设置为True,这个字段的值必须在整个表中保持唯一。 自动设置主键 默认情况下,Django 给每个模型一个自动递增的主键,其类型在AppConfig.default_auto_field中指定,或者在DEFAULT_AUTO_FIELD配置中全局指定。例如: id = models.BigAutoField(primary_key=True) ...
class BookAdmin(admin.ModelAdmin): list_display = ['title', 'display_author', 'display_genre'] list_filter = ['title'] # fields = ('title', ('author', 'genre')) class BookInstanceAdamin(admin.ModelAdmin): list_display = ['uniqueId', 'displayBookName', 'displayBookAuthor'] ...
'unique':_('%(model_name)swith this%(field_label)s''already exists.'),# Translators: The 'lookup_type' is one of 'date', 'year' or 'month'.# Eg: "Title must be unique for pub_date year"'unique_for_date':_("%(field_label)smust be unique for ""%(date_field_label)s%(...
所以我们需要在Interface模型中添加一个Meta的类,并为它添加属性unique_together(组合唯一),组合唯一的条件可能有多组,所以其值是一个列表,列表中的每个成员是一个元组,代表元组内的多个字段应满足组合唯一的约束。其实设备名和端口索引号也应该是组合唯一的,我们也完全可以写作 [('dev', 'name'),('dev', '...
创建用户的model,继承了AbstractUser 代码语言:javascript 代码运行次数:0 运行 AI代码解释 classUser(AbstractUser):""" add mobile,email_active fields to Django user model.""" mobile=models.CharField('手机号',max_length=11,unique=True,help_text='手机号',error_messages={'unique':'此手机号码已注册...
问Django使用unique_together迭代对象集，不使用pkEN# orders/Models.pyclassOrderInfo(models.Model):order...