Django model和modelform使用

(1)model的知识点

# 继承auth_user表
class UserInfo(AbstractUser):
    tel=models.CharField(max_length=32)
    gender=models.IntegerField(choices=((1,"男"),(2,"女")),default=1)

apollo =UserInfo.objects.get(pk=1)
# 使用了choices参数的field在其model示例里,可以用"get_field的名字_display"方法显示choices的显示字串（就是2元元组的第二个数据）
apollo.get_gender_display()

 

(2)modelform使用

# model.py:
class Book(models.Model):
    nid=models.AutoField(primary_key=True)
    title=models.CharField(max_length=32)
    price=models.DecimalField(max_digits=8,decimal_places=2) # 999999.99
    pub_date=models.DateTimeField()  # "2012-12-12"

    # comment_count=models.IntegerField(default=100)
    # poll_count=models.IntegerField(default=100)

    publish=models.ForeignKey(to="Publish",on_delete=models.CASCADE)  # 级联删除
    authors=models.ManyToManyField(to="Author")
    def __str__(self):
        return self.title

form.py文件:
# 构建modelform
class BookModelForm(forms.ModelForm):
    class Meta:
        model=Book
        fields="__all__"
#############################################################################           
'''
BookModelForm等同于：
class BookForm(forms.Form):
    title=forms.CharField(max_length=32)
    price=forms.IntegerField()
    pub_date=forms.DateField(widget=widgets.TextInput(attrs={"type":"date"}))
    
    #publish=forms.ChoiceField(choices=[(1,"AAA"),(2,"BBB")])
    publish=forms.ModelChoiceField(queryset=Publish.objects.all())
    authors=forms.ModelMultipleChoiceField(queryset=Author.objects.all())
'''