在一个模板中区分创建和更新表单 [英] Within a template distinguish between create and update form

问题描述

如果CreateView和UpdateView正在使用相同的模板model_form.html，那么在模板中，如果我正在创建或更新表单，我将如何区分？

If the CreateView and UpdateView are using the same template "model_form.html" then within the template how would I differentiate if I am creating or updating a form?

我的通用视图如下

class AuthorCreateView(CreateView):
    form_class = AuthorForm
    model = Author


class AuthorUpdateView(UpdateView):
    form_class = AuthorForm
    model = Author

AuthorForm如下

AuthorForm is as follows

class AuthorForm(ModelForm):
    class Meta:
        model = Author
        fields = ('first_name', 'last_name')

我的模板如下

<form action="" method="post">
            {% csrf_token %}
            <table border="0" cellpadding="4" cellspacing="0">
                <tr>
                    <td>First Name</td>
                    <td>{{ form.first_name.errors }}{{ form.first_name }}</td>
                </tr>
                <tr>
                    <td>Last Name</td>
                    <td>{{ form.last_name.errors }} {{ form.last_name }}</td>
                </tr>
            </table>
            {% if form.isNew %}
                <input type="submit" value="Update Author" />
            {% else %}
                <input type="submit" value="Add Author" />
            {% endif %}
        </form>

在我的模板中，我想区分创建和更新视图？

In my template I would like to differentiate between create and update view?

推荐答案

在更新视图中，会有一个 form.instance ，而 form.instance.pk 不会为None。在创建视图中，可能有也可能不是 form.instance ，但即使有 form.instance.pk 将为无。

In an update view, there'll be a form.instance, and form.instance.pk will not be None. In a create view, there may or may not be form.instance, but even if there is form.instance.pk will be None.

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