Question

我将这两个模型定义为一对多关系

来自django.core.validators导入RegexValidator 来自django.db导入模型

class Template(models.Model):
    name = models.CharField(max_length=100)
    fields = models.IntegerField()

    def __str__(self):
        return self.name


class Page(models.Model):
    template = models.ForeignKey(Template, related_name='pages')

    title = models.CharField(max_length=100)

    text = []

    for i in range(template.fields):   #Error occuring here
        text[i] = models.TextField()

    def __str__(self):
        return self.title

我想获得template.fields的值，但是我得到了这个错误

for i in range(template.fields):
AttributeError: 'ForeignKey' object has no attribute 'fields'

我使用的是ForeignKey对象错了吗？任何帮助将不胜感激

Answer 1

您无法获取数据以迭代模板字段。如果您修改它，请使用__init__功能。

class Template(models.Model):
    name = models.CharField(max_length=100)
    fields = models.IntegerField()

    def __str__(self):
        return self.name


class Page(models.Model):
    template = models.ForeignKey(Template, related_name='pages')

    title = models.CharField(max_length=100)

    text = []

    def __init__(self, request, *args,**kwargs):
        super (Page,self ).__init__(*args,**kwargs)
        self.fields['template'].queryset = Template.objects.all()

    def __str__(self):
        return self.title

Django在模型中获取ForeignKey对象的字段

1 个答案: