如何创建一个与 MultiContentTreeFieldWidget 类似但保留项目顺序的 Plone 表单小部件

发布于 2024-12-10 07:18:29 字数 993 浏览 1 评论 0原文

我有一种灵巧的行为，允许我关联项目并将关系存储为 UUID。

relatedItems = schema.List(
            title=u"Related Items",
            description=u"Search for content that is related to this item",
            required=False,
            value_type=schema.Choice(
                source=UUIDSourceBinder(navigation_tree_query={'portal_type':
                   TYPES_WITH_TEASERS})))
form.widget(relatedItems='plone.formwidget.contenttree.widget.MultiContentTreeFieldWidget')

这非常有效，除非您有一些关系，然后每次编辑项目时它们的顺序都会发生变化。我们在页面的右侧栏中显示相关项目（例如，请参阅这篇有关食品的文章) 并希望控制顺序，以便我们可以将更有趣的预告片放在前面。

调试看来，这种重新排序可能是由于 z3c.formwidget.query.widget.QuerySourceRadioWidget.update 在处理请求参数时使用了一组参数。据推测，这是为了防止重复，但有两个令人讨厌的副作用：

字段的值在未更改
顺序时被更新，当它可能很重要时会丢失

是否有替代 MultiContentTreeFieldWidget 的工作方式类似方式但保留添加项目的顺序？更好的是有一个小部件可以执行此操作并且还允许您重新排序项目吗？

原文

I have a dexterity behaviour that allows me to relate items and store the relations as UUIDs

relatedItems = schema.List(
            title=u"Related Items",
            description=u"Search for content that is related to this item",
            required=False,
            value_type=schema.Choice(
                source=UUIDSourceBinder(navigation_tree_query={'portal_type':
                   TYPES_WITH_TEASERS})))
form.widget(relatedItems='plone.formwidget.contenttree.widget.MultiContentTreeFieldWidget')

This works great except that if you have a few relations then every time you edit the item their order changes. We're displaying the related items in the right hand column of the page (e.g. see this article about food) and want to control the order so that we can put more interesting teasers first.

Debugging it looks likely this reordering is down to the fact z3c.formwidget.query.widget.QuerySourceRadioWidget.update uses a set when processing request parameters. Presumably this is to prevent duplicates but has two nasty side effects:

a field’s value gets updated when it hasn't changed
order is lost when it might be important

Is there an alternative to MultiContentTreeFieldWidget that works in a similar way but preserves the order you add items? Even better is there a widget that does this and also allows you to reorder items as well?

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您的好友蓝忘机已上羡 2024-12-17 07:18:29

我没有找到替代方案，但随后 z3c.formwidget.query 已更新为在处理请求参数时使用列表而不是集合。版本 0.7 修复了此问题

http://pypi.python.org/pypi/z3c.formwidget .query/0.7

将以下内容添加到 buildout 中的 [versions] 部分以解决

z3c.formwidget.query = 0.7

I didn't find an alternative but subsequently z3c.formwidget.query has been updated to use a list instead of a set when processing request parameters. Version 0.7 fixes this

http://pypi.python.org/pypi/z3c.formwidget.query/0.7

Add the following to your [versions] section in buildout to resolve