我可以在Plone portlet上使用z3c.form而不是zope.formlib吗？

Question

考虑到我有一个普通的ZopeSkel plone3_portlet formlib生成包，我需要做哪些修改？Ie：

• 我应该从哪个类继承？
• 我必须提供哪一个钩子？

我可以一直使用它，包括five.grok和plone.directives.form吗？

Answer 1

是的，你可以这样做，你需要的是添加/编辑表单.下面是我为一个Jarn项目所做的工作，您可以使用AddForm和EditForm，就像使用它们的formlib等价物一样：

from Acquisition import aq_parent, aq_inner
from plone.app.portlets import PloneMessageFactory as _
from plone.app.portlets.browser.interfaces import IPortletAddForm
from plone.app.portlets.browser.interfaces import IPortletEditForm
from plone.app.portlets.interfaces import IPortletPermissionChecker
from z3c.form import button
from z3c.form import form
from zope.component import getMultiAdapter
from zope.interface import implements


class AddForm(form.AddForm):
    implements(IPortletAddForm)

    label = _(u"Configure portlet")

    def add(self, object):
        ob = self.context.add(object)
        self._finishedAdd = True
        return ob

    def __call__(self):
        IPortletPermissionChecker(aq_parent(aq_inner(self.context)))()
        return super(AddForm, self).__call__()

    def nextURL(self):
        addview = aq_parent(aq_inner(self.context))
        context = aq_parent(aq_inner(addview))
        url = str(getMultiAdapter((context, self.request),
                                  name=u"absolute_url"))
        return url + '/@@manage-portlets'

    @button.buttonAndHandler(_(u"label_save", default=u"Save"), name='add')
    def handleAdd(self, action):
        data, errors = self.extractData()
        if errors:
            self.status = self.formErrorsMessage
            return
        obj = self.createAndAdd(data)
        if obj is not None:
            # mark only as finished if we get the new object
            self._finishedAdd = True

    @button.buttonAndHandler(_(u"label_cancel", default=u"Cancel"),
                             name='cancel_add')
    def handleCancel(self, action):
        nextURL = self.nextURL()
        if nextURL:
            self.request.response.redirect(nextURL)
        return ''


class EditForm(form.EditForm):
    """An edit form for portlets.
    """

    implements(IPortletEditForm)

    label = _(u"Modify portlet")

    def __call__(self):
        IPortletPermissionChecker(aq_parent(aq_inner(self.context)))()
        return super(EditForm, self).__call__()

    def nextURL(self):
        editview = aq_parent(aq_inner(self.context))
        context = aq_parent(aq_inner(editview))
        url = str(getMultiAdapter((context, self.request),
                                  name=u"absolute_url"))
        return url + '/@@manage-portlets'

    @button.buttonAndHandler(_(u"label_save", default=u"Save"), name='apply')
    def handleSave(self, action):
        data, errors = self.extractData()
        if errors:
            self.status = self.formErrorsMessage
            return
        changes = self.applyChanges(data)
        if changes:
            self.status = "Changes saved"
        else:
            self.status = "No changes"

        nextURL = self.nextURL()
        if nextURL:
            self.request.response.redirect(self.nextURL())
        return ''

    @button.buttonAndHandler(_(u"label_cancel", default=u"Cancel"),
                             name='cancel_add')
    def handleCancel(self, action):
        nextURL = self.nextURL()
        if nextURL:
            self.request.response.redirect(nextURL)
        return ''

Answer 2

开放源码的collective.dancing.browser.portlets.channelsubscribe模块有用z3c.form编写的portlet实现。

不过，这是个大烂摊子。我建议不要对portlets做任何花哨的事情，因为它的复杂性会在你面前大爆炸。

见http://dev.plone.org/collective/browser/collective.dancing/trunk/collective/dancing/browser/portlets/channelsubscribe.py或http://pypi.python.org/pypi/collective.dancing

Answer 3

这当然是可以做到的。我们已经在一个4.0plone项目中使用了这一点，其中一位同事分别使用IPortletAddForm和z3c.form.form.EditForm基类创建了一个基本的z3c.form.form.AddForm和z3c.form.form.EditForm实现。

请注意，这是Plone 4.0，而不是3.x，所以您的里程可能会有所不同。

该实现是它们的zope.formlib原始文件的基本重新实现，有简单的buttonAndHandler处理程序来处理Add (add )、Save (编辑表单)和Cancel (两者都)按钮。

我相信我们有计划将基本表单实现贡献给plone.app.portlets，我会问他。