Django 模板标签获取特定表单字段

发布于 2024-11-09 10:50:04 字数 871 浏览 0 评论 0原文

我有一个调查应用程序，可以创建动态大小的表单。我使用公式“question_id_part”，其中问题是固定的，id 是所问问题的 id，part 是三个部分之一。

在我的模板中，我需要能够按类别对这些进行分组，因此我循环访问调查中的类别，获取该类别中的所有问题，然后我有一个模板标记来获取我的表单字段。

{% load my_tags %}
...
{% for category in survey.category_set.all %}
    <h3>{{category}}</h3>
    {% for question in category.factor_set.all %}
        {% get_field_for_question_part question.id form "type" %} 
    {% endfor %}
{% endfor %}
...

然后我有一个相应的模板标签，如下所示：

@register.simple_tag
def get_field_for_question_part(question_id, form, part):
    field_name = "question_%s_%s" % (question_id, part)
    field = form.fields[field_name]
    return BoundField(form, field, field_name)

我的问题是这样的：通过显式导入 BoundField，我的模板标记对表单内部的工作方式了解太多，因此对于表单非公开行为的未来变化很脆弱。因此，在我看来，BoundField 应该可以作为现场方法以某种方式进行访问——但我一生都无法弄清楚该方法是什么。我错过了一些明显的东西吗？

原文

I have a survey application that creates forms of dynamic size. I use the formula "question_id_part" where question is fixed, id is the id of the question being asked, and part is one of three parts.

In my template, I need to be able to group these by a category, so I loop through the categories in the survey, get all the questions in that category, then I have a template tag to get my form field.

{% load my_tags %}
...
{% for category in survey.category_set.all %}
    <h3>{{category}}</h3>
    {% for question in category.factor_set.all %}
        {% get_field_for_question_part question.id form "type" %} 
    {% endfor %}
{% endfor %}
...

Then I have a corresponding template tag that looks like this:

@register.simple_tag
def get_field_for_question_part(question_id, form, part):
    field_name = "question_%s_%s" % (question_id, part)
    field = form.fields[field_name]
    return BoundField(form, field, field_name)

My question is this:
By explicitly importing BoundField my template tag knows too much about how forms work internally and thus is brittle to future changes in the non-public behavior of forms. Thus, it seems to me that the BoundField should be accessible somehow as a method on field -- but for the life of me I can't figure out what that method would be. Am I missing something obvious?

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看海 2024-11-16 10:50:04

尝试：

@register.simple_tag
def get_field_for_question_part(question_id, form, part):
    field_name = "question_%s_%s" % (question_id, part)
    return form.__getitem__(field_name)

请参阅第 101 行的方法定义： django/forms/forms.py

Try:

@register.simple_tag
def get_field_for_question_part(question_id, form, part):
    field_name = "question_%s_%s" % (question_id, part)
    return form.__getitem__(field_name)

See method definition on line 101 here: django/forms/forms.py

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