Question

我查看了所有相关答案，但没有解决我的问题。我试图保存一个没有运气的对象。我可以看到执行的视图和我为对象更新的值，但更改没有反映在数据库中。以下是视图和模型的代码段。

views.py

class Workspace(_LoggedInMixin, View):
    def get(self, request):
        user = self.request.user
        components = ComponentModel.objects.filter(Q(user=user) | Q(user=None)).order_by('time')
        component_status = request.session.get('component', None)
        request.session['component'] = None
        params = dict(components=components, status=component_status)
        return render(request, 'workspace.html', params)

    def post(self, request):
        data = request.POST
        formtype = data['form-type']
        error = None
        user = self.request.user
        if formtype == 'component':
            if data['action'] == 'create':
                try:
                    if not os.path.exists('D:/' + self.request.user.username):
                        os.makedirs('D:/' + self.request.user.username)
                    cparent = ComponentModel.objects.get(pk=data['cparent'])
                    component = ComponentModel(user=user, name=data['cname'], time=dt.now(), stats=data['cstats'],
                                               output=data['coutput'], parent=cparent)
                    component.save()
                    file = open('D:/' + self.request.user.username + '/' + str(component.id) + '.py', 'w+')
                    usercode = data['usercode']
                    usercode = "\n".join(usercode.split("\r\n"))
                    file.write(usercode)
                    component.codefile = 'D:/' + self.request.user.username + '/' + str(component.id) + '.py'
                    component.save()
                    request.session['component'] = {'name': data['cname'], 'message': 'Component created successfully!'}
                except Exception as e:
                    component.delete()
                    error = e.message
            elif data['action'] == 'delete':
                try:
                    c = ComponentModel.objects.get(pk=data['compid'])
                    cname = c.name
                    c.delete()
                    os.remove('D:/' + self.request.user.username + '/' + data['compid'] + '.py')
                    request.session['component'] = {'name': cname, 'message': 'Component deleted successfully!'}
                except Exception as e:
                    error = e.message
            elif data['action'] == 'save':
                try:
                    if not os.path.exists('D:/' + self.request.user.username):
                            os.makedirs('D:/' + self.request.user.username)
                    cparent = ComponentModel.objects.get(pk=data['cparent'])
                    component = ComponentModel.objects.get(pk=data['compid'])
                    component.user = user
                    component.name = data['cname']
                    component.time = dt.now()
                    component.stats = data['cstats']
                    component.output = data['coutput']
                    component.parent = cparent
                    component.save()
                    print component
                    file = open('D:/' + self.request.user.username + '/' + str(component.id) + '.py', 'w+')
                    usercode = data['usercode']
                    usercode = "\n".join(usercode.split("\r\n"))
                    file.write(usercode)
                    request.session['component'] = {'name': data['cname'], 'message': 'Component saved successfully!'}
                except Exception as e:
                    error = e.message
        if error is not None:
            components = ComponentModel.objects.filter(Q(user=user) | Q(user=None)).order_by('time')
            params = dict(error=error, components=components)
            return render(request, 'workspace.html', params)
        return redirect('/workspace')

models.py

class ComponentModel(models.Model):
    class Meta:
        # overriding the default table name with the following name
        db_table = 'components'
        verbose_name = 'components'
        get_latest_by = 'time'

    user = models.ForeignKey('auth.User', on_delete=models.CASCADE, null=True)
    name = models.CharField(max_length=255)
    time = models.DateTimeField(db_column='created_on')
    codefile = models.CharField(max_length=100, db_column='code_file_name', null=True)
    stats = models.TextField(db_column='statistical_fields', null=True)
    output = models.TextField(db_column='output_fields')
    parent = models.ForeignKey('self', on_delete=models.CASCADE, null=True)

    def save(self, *args, **kwargs):
        try:
            super(ComponentModel, self).save(self, *args, **kwargs)
        except Exception as e:
            return "Something went wrong while saving the component. Details - %s" % e.message

    def __str__(self):
        return "{id: %s, name: %s, user: %s, time: %s, parent: %s}" % (
            self.id, self.name, self.user, self.time, self.parent)

data['action'] == 'create'中的第二次保存调用和data['action'] == 'save'中的保存调用未更新数据库。我感谢任何帮助。谢谢。

Answer 1

您的超级电话不正确。更新以便read ... dow not %eof; do stuff read ... enddo;不会被调用为方法参数 - 因为您已经编写它将始终失败。

此外，在未完成保存时，您不会引发异常，因此除非查看std输出，否则您不知道是否存在错误。您可能希望这实际上引发错误。

更新 -

self

django保存不在views.py中作为更新使用具有重写保存的模型

1 个答案: