如何访问Django模型中保存为布尔字段的用户首选项?

时间:2012-10-11 16:25:13

标签: django django-models django-templates django-views

我正在尝试向用户帐户添加偏好设置。每个偏好都是真/假值,它需要保持这种状态。

由于每个帐户可能有多个偏好设置,因此我想知道如何在我的模板中循环显示这些偏好设置,并在整个应用程序中轻松提供这些偏好设置。

实施例。我想显示用户名和他们喜欢的所有颜色。

models.py

class UserColors(models.Model):
    white = models.BooleanField(_("White"))
    black = models.BooleanField(_("Black"))

class Account(models.Model):
    user = models.OneToOneField(User, unique=True, verbose_name='user', related_name='account')
    colors = models.ForeignKey('UserColors', null=True)

views.py

class UserView(DetailView):
    context_object_name = 'account'
    template_name = 'detail.html'

    def get_object(self, queryset=None):
        return self.request.user

template.html

user: {% account.user.username %} <br>
colors: 

# the following would be ideal instead of doing multiple ifs in search for true/false values
{% for color in account.colors %}
    color.name
{% endif %}

输出

user: userName
colors: white, black

1 个答案:

答案 0 :(得分:1)

<强>更新

在我的原始答案中,我尝试重构数据并将值保持为布尔值。看起来我们需要更接近原始结构。

您可以遍历UserColors模型上的字段。在View代码中更容易,因为你需要getattr:

def get_context_data(self, request, *args, **kwargs):
    data = super(UserView, self).get_context_data(request, *args, **kwargs)
    acct = data['account'] # Guessing this is here based on your posted template code
    colors = {}
    for field in acct.colors._meta.fields:
        colors[field.name] = getattr(acct.colors, field.name, False)
    data['usercolors'] = colors
    return data

然后在模板中:

{% for k,v in usercolors.items() %}
   {% if v %}
   {{ k }}
   {% endif %}
{% endfor %}

原始回答:

你可以像这样构建它:

class UserColor(models.Model):
    colors = {
        "WHITE": "WHT",
        "BLACK": "BLK",
    }

    color_choices = (
        (colors['WHITE'], "White"),
        (colors['BLACK'], "Black"),
    )

    name = models.CharField(_("Color Name"), max_length=3, choices=color_choices)
    value = models.BooleanField(_("Whether they like it"))
    user = models.ForeignKey(User)

然后在每个用户为您要指定的每种颜色指定一个:

user = User.objects.get(name="me")
white = UserColor.objects.create(
    color=UserColor.colors['WHITE'], value=False, user=user)
black = UserColor.objects.create(
    color=UserColor.colors['BLACK'], value=True, user=user)

像这样使用:

{% for color in user.color_set.all() %}
  {{ color.name }}: {{ color.value }}
{% endfor %}