Question

在我的Django-1.5.1应用程序中，我有以下情况：

models.py

class Cod(models.Model):
    name = models.SlugField()
    user = models.ForeignKey(User)

class Steps(models.Model):
    number = models.PositiveSmallIntegerField()
    cod = models.ForeignKey(Cod, related_name='cod')
    step_cod = models.ForeignKey(Cod, null=True, related_name='step_cod')
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey()

forms.py

class StepsForm(ModelForm):
    class Meta:
       model = Steps

views.py

def getSteps(request):
    cod_id = 1
    steps = Steps.objects.filter(cod=cod_id).order_by('number')
    StepFormset = generic_inlineformset_factory(Steps, form=StepsForm, can_delete=False)
    step_formset = StepFormset(queryset=steps)
    for step in steps:
        print step.content_object
    print "-------------------------"
    for form in step_formset:
        print form.instance
    print "-------------------------"
    for form in step_formset:
        print form.instance.content_object

    return render_to_response('tss/base_codForm.html',
                             {'step_formset': step_formset},
                              context_instance=RequestContext(request))

base_codForm.html

{% for form in step_formset %}
    {{ form }}
{% endfor %}

查看 views.py 中的for循环输出，我得到了正确的相关对象，我的formset中的步骤实例，但缺少表单实例中的content_object：

ObjectAggregate object
ObjectGroup object
ObjectRefine object
ObjectSizeCheck object
-------------------------
Steps object
Steps object
Steps object
-------------------------
None
None
None

确实，我的模板只呈现number，cod和step_cod字段：

<tr>
    <th><label for="id_tss-steps-content_type-object_id-0-number">Number:</label></th>
    <td><input id="id_tss-steps-content_type-object_id-0-number" name="tss-steps-content_type-object_id-0-number" type="text" /></td>
</tr>
<tr>
    <th><label for="id_tss-steps-content_type-object_id-0-cod">Cod:</label></th>
    <td>
        <select id="id_tss-steps-content_type-object_id-0-cod" name="tss-steps-content_type-object_id-0-cod">
            <option value="" selected="selected">---------</option>
            <option value="1">Cod object</option>
        </select>
    </td>
</tr>
<tr>
    <th><label for="id_tss-steps-content_type-object_id-0-step_cod">Step cod:</label></th>
    <td>
        <select id="id_tss-steps-content_type-object_id-0-step_cod" name="tss-steps-content_type-object_id-0-step_cod">
            <option value="" selected="selected">---------</option>
            <option value="1">Cod object</option>
        </select>
        <input id="id_tss-steps-content_type-object_id-0-id" name="tss-steps-content_type-object_id-0-id" type="hidden" />
    </td>
</tr>

<tr>
    <th><label for="id_tss-steps-content_type-object_id-1-number">Number:</label></th>
    <td><input id="id_tss-steps-content_type-object_id-1-number" name="tss-steps-content_type-object_id-1-number" type="text" /></td>
</tr>
<tr>
    <th><label for="id_tss-steps-content_type-object_id-1-cod">Cod:</label></th>
    <td>
        <select id="id_tss-steps-content_type-object_id-1-cod" name="tss-steps-content_type-object_id-1-cod">
            <option value="" selected="selected">---------</option>
            <option value="1">Cod object</option>
        </select>
    </td>
</tr>
<tr>
    <th><label for="id_tss-steps-content_type-object_id-1-step_cod">Step cod:</label></th>
    <td>
        <select id="id_tss-steps-content_type-object_id-1-step_cod" name="tss-steps-content_type-object_id-1-step_cod">
            <option value="" selected="selected">---------</option>
            <option value="1">Cod object</option>
        </select>
        <input id="id_tss-steps-content_type-object_id-1-id" name="tss-steps-content_type-object_id-1-id" type="hidden" />
    </td>
</tr>

<tr>
    <th><label for="id_tss-steps-content_type-object_id-2-number">Number:</label></th>
    <td><input id="id_tss-steps-content_type-object_id-2-number" name="tss-steps-content_type-object_id-2-number" type="text" /></td>
</tr>
<tr>
    <th><label for="id_tss-steps-content_type-object_id-2-cod">Cod:</label></th>
    <td>
        <select id="id_tss-steps-content_type-object_id-2-cod" name="tss-steps-content_type-object_id-2-cod">
            <option value="" selected="selected">---------</option>
            <option value="1">Cod object</option>
        </select>
    </td>
</tr>
<tr>
    <th><label for="id_tss-steps-content_type-object_id-2-step_cod">Step cod:</label></th>
    <td>
        <select id="id_tss-steps-content_type-object_id-2-step_cod" name="tss-steps-content_type-object_id-2-step_cod">
            <option value="" selected="selected">---------</option>
            <option value="1">Cod object</option>
        </select>
        <input id="id_tss-steps-content_type-object_id-2-id" name="tss-steps-content_type-object_id-2-id" type="hidden" />
    </td>
</tr>

我错过了什么？如何在我的formset中获取相关的通用对象？谢谢。

Answer 1

似乎models.py应该是：

class Steps(models.Model):
    ...
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')

此外，您可以查看this decision

generic_inlineformset_factory不会将GenericForeignKey显示到模板中

1 个答案: