'update_grid'对象没有属性'title'

Question

我编写了model.py和views.py.当我从Admin添加json变量时，它会给出以下错误

'update_grid' object has no attribute 'title'

我的views.py

def save_grid(request):
    if request.method == 'POST':
            data = json.loads(request.body)
            grid = update_grid(data=data)
            grid.save()
            return HttpResponse('success') # if everything is OK

我的models.py

from django.db import models
from django.utils import timezone
from jsonfield import JSONField



class update_grid(models.Model):
    data = JSONField()

    def __str__(self):
        return self.title

我的JSON变量是形式的

 [{"col":1,"row":1,"size_x":1,"size_y":1},{"col":2,"row":1,"size_x":1,"size_y":1},{"col":3,"row":1,"size_x":1,"size_y":1},{"col":4,"row":1,"size_x":1,"size_y":1},{"col":1,"row":2,"size_x":1,"size_y":1},{"col":2,"row":2,"size_x":1,"size_y":1},{"col":3,"row":2,"size_x":1,"size_y":1},{"col":4,"row":2,"size_x":1,"size_y":1},{"col":1,"row":3,"size_x":1,"size_y":1},{"col":2,"row":3,"size_x":1,"size_y":1},{"col":3,"row":3,"size_x":1,"size_y":1},{"col":4,"row":3,"size_x":1,"size_y":1},{"col":5,"row":1,"size_x":1,"size_y":1},{"col":6,"row":1,"size_x":1,"size_y":1}] 

Answer 1

您的代码使用实例变量title：

def __str__(self):
    return self.title

当Python'通过你的vars'看到它看到self.title从未被声明，因此你得到一个错误。要修复它，我会为你的模型添加标题：

class update_grid(models.Model):
    title = models.CharField(max_length=30)
    data = JSONField()

    def __str__(self):
        return self.title

我希望它有所帮助