[英]Django: to pass data JSON from view to javascript
I have my model 我有我的模特
class Calendar(models.Model):
name = models.CharField(_('name'), max_length=50)
class Event(models.Model):
....
calendar = models.ForeignKey(Calendar, verbose_name=_('categorie'))
and my view: 和我的看法:
event_list = []
events = Event.objects.all()
for event in events:
event_list.append({
'categorie': event.calendar
})
return http.HttpResponse(json.dumps(event_list),
content_type='application/json')
I try to return event.categorie in a javascript file but It's not working alert(event.categorie) display undefined.... 我尝试在JavaScript文件中返回event.categorie,但是它无法正常运行Alert(event.categorie)显示未定义。...
if I print event_list, I have 如果我打印event_list,我有
{'categorie': <Calendar: thermique>}
The problem comes from models.ForeignKey ? 问题来自models.ForeignKey?
You can't dumps Calendar instance to json. 您不能将Calendar实例转储到json。 You should get error
TypeError <Calendar: thermique> is not JSON serializable
. 您应该得到错误
TypeError <Calendar: thermique> is not JSON serializable
。
You need convert Calendar instance to dict of simple types. 您需要将Calendar实例转换为简单类型的dict。 For example add method
as_dict
to Calendar: 例如,将方法
as_dict
添加到Calendar:
class Calendar(models.Model):
name = models.CharField(_('name'), max_length=50)
def as_dict(self):
return {
'id': self.id,
'name': self.name,
}
and use it in you code: 并在您的代码中使用它:
for event in events:
event_list.append({
'categorie': event.calendar.as_dict(),
})
it just the calendar names
它只是日历名称
Since all you need is the calendar names you can modify your query a little bit to use values
but the real problem is probably called by needing to resolve the queryset 由于您只需要日历名称,因此您可以对查询进行一些修改以使用
values
但是真正的问题可能是通过解决查询集而引起的
events = Event.objects.values('calendar__name')
return http.JsonResponse(status=200,
{'categories': json.dumps(list(events))})
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