Django ModelForm-表单显示值 [英] Django ModelForm - form display values

问题描述

我有一个模型：

class SchedulerProfile(models.Model):
    user = models.ForeignKey(User, unique=True)
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)

    def __unicode__(self):
        return u'%s' % (self.user)

我也有一个模型与Scheduler之间的M2M关系：

I also have a model that has a M2M relationship with the Scheduler:

class OfficialProfile(models.Model):
    user = models.ForeignKey(User, unique=True)
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)

    schedulers = models.ManyToManyField(SchedulerProfile, verbose_name="Your schedulers", related_name="off_schedulers") 

当我从OfficialProfile创建一个ModelForm时，该表单将调度程序的内容呈现为multiselect作为用户名。我想让它在字段中显示 user.first_name user.last_name 而不是用户。我知道我可以更改unicode返回值来完成此操作，但出于某些原因，我不愿意这样做。在ModelForm的 __ init __ 中，您应该可以执行以下操作：

When I create a ModelForm from the OfficialProfile, the form renders the contents of the scheduler multiselect as the username. I'd like to get it to display user.first_name user.last_name in the field instead of the user. I know I can change the unicode return value to accomplish this, but I'd rather not do that for reasons. In the __init__ of the ModelForm, you should be able to do something like:

self.fields['schedulers'].queryset = SchedulerProfile.objects.values('user__first_name', 'user__last_name')

但这不会产生预期的结果。这似乎是一个非常基本的问题，但是搜索答案并没有太多揭示。

But that doesn't produce the desired results. This seems like a really basic question, but searching for the answer hasn't revealed much.

推荐答案

子类 ModelMultipleChoiceField 并覆盖 label_from_instance 。

from django.forms import ModelMultipleChoiceField

class SchedulerProfileChoiceField(ModelMultipleChoiceField):
    def label_from_instance(self, obj):
        return "%s %s" % (obj.first_name, obj.last_name)

然后在模型表单中使用您的多项选择字段。

Then use your multiple choice field in the model form.

class OfficialProfileForm(forms.ModelForm):
    schedulers = SchedulerProfileChoiceField(queryset=SchedulerProfile.objects.all())

这篇关于Django ModelForm-表单显示值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！