小编Bri*_*ian的帖子

我有这些模型(我已将字段数量限制为仅需要的那些)

class unit(models.Model):
    name = models.CharField(max_length=200)

class project(models.Model):
    name = models.CharField(max_length=200)

class location(address):
    project = models.ForeignKey(project)

class project_unit(models.Model):
    project = models.ForeignKey(project)         
    unit = models.ForeignKey(unit)

class location_unit(models.Model):
    project = models.ForeignKey(project)    
      #Limit the selection of locations based on which project has been selected
    location = models.ForeignKey(location)
      #The same here for unit. But I have no idea how.
    unit = models.ForeignKey(project_unit)       

我的新手头只是无法掌握如何限制location_unit模型中的两个字段,位置和单位,只显示在location_unit中引用所选项目的选项.我应该覆盖模型并在那里进行查询,还是可以使用limit_choices_to.无论哪种方式,我都尝试失败了

编辑:只是为了澄清,我想在Django Admin中发生这种情况.我也试过了formfield_for_foreignkey,但仍然不适合我.

编辑2:

def formfield_for_foreignkey(self, db_field, request, **kwargs):
    if db_field.name == "unit":
        kwargs["queryset"] = project_unit.objects.filter(project=1)
        return db_field.formfield(**kwargs)
    return super(location_unit_admin, self).formfield_for_foreignkey(db_field, request, …

这一切都很简单.我有这样的形式:

class add_basketForm(forms.Form):
def __init__(self, selected_subunits, *args, **kwargs):


    self.selected_subunits = selected_subunits
    super(add_basketForm, self).__init__(*args, **kwargs)

    for subunit in self.selected_subunits:
        self.fields['su%d' % (subunit['unit__id'])] = forms.IntegerField()

子单元的数量未知.我想用这样的东西(你明白了):

{% for unit in selected_subunits %}
  {{ form.su%s }} % (unit.unit__id)
{% endfor %}

但当然这不起作用.我的问题是如何在Django模板语言中引用这些表单域？

我试图弄清楚QT中是否有任何东西等同于Delphi的Align属性,如alTop,alClient,alRight等等？