使用内联表单集创建模型和相关模型 [英] Creating a model and related models with Inline formsets

问题描述

[我已将其发布到 Django 用户 |Google 网上论坛也是.]

[I have posted this at the Django users | Google Groups also.]

使用内联表单集文档，我能够编辑属于特定模型的对象(使用模型).我一直在尝试遵循相同的模式创建 使用内联表单集的新对象，但一直无法我的头脑清醒到足以为此目的提出工作观点.

Using the example in the inline formset docs, I am able to edit objects belonging a particular model (using modelforms). I have been trying to follow the same pattern for creating new objects using inline formsets, but have been unable to clear my head enough to bring out a working view for this purpose.

使用与上述链接相同的示例，我将如何进行创建一个作者"模型的新实例及其相关的书"对象?

Using the same example as in the above link, how would I go about creating a new instance of an "Author" model together with its related "Book" objects?

推荐答案

首先，创建一个 Author 模型表单.

First, create a Author model form.

author_form = AuthorModelForm()

然后创建一个虚拟作者对象:

then create a dummy author object:

author = Author()

然后像这样使用虚拟作者创建一个内联表单集:

Then create a inline formset using the dummy author like so:

formset = BookFormSet(instance=author)  #since author is empty, this formset will just be empty forms

将其发送到模板.数据返回视图后，创建作者:

Send that off to a template. After the data is returned back to the view, you create the Author:

author = AuthorModelForm(request.POST)
created_author = author.save()  # in practice make sure it's valid first

现在将内联表单集与新创建的作者挂钩，然后保存:

Now hook the inline formset in with the newly created author and then save:

formset = BookFormSet(request.POST, instance=created_author)
formset.save()   #again, make sure it's valid first

<小时>

要在新表单上没有复选框，请使用模板:

To have no checkboxes on new forms, do this is a template:

{% for form in formset.forms %}
    <table>
    {% for field in form %}
        <tr><th>{{field.label_tag}}</th><td>{{field}}{{field.errors}}</td></tr>
    {% endfor %}

    {% if form.pk %} {# empty forms do not have a pk #}
         <tr><th>Delete?</th><td>{{field.DELETE}}</td></tr>
    {% endif %}
    </table>
{% endfor %}

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