Plone-如何让验证器从行为中验证特定内容类型的字段？

Question

我正在使用Plone 4.3，我有一个form.SchemaForm plone.directives有一个接口，该接口具有IEventBasic的起始字段和验证器：

from datetime import timedelta
from plone.directives import form
from plone.app.contenttypes.interfaces import IEvent
from z3c.form import validator
from zope.component import provideAdapter
from zope.interface import Invalid

class IMyObject(form.SchemaForm)
    my_field_a = schema.TextLine(title='a_field')
    ...

class MyObject(Item):
    implements(IMyObject, IEvent)

class EndMyObjectValidator(validator.SimpleFieldValidator):
    def validate(self,value):
        #code for checking if end field is within a certain range from start field
        if self.end > self.start + timedelta(days=6):
            raise Invalid('The end date is not within range of the start date's week')

validator.WidgetValueDiscriminators(EndMyObjectValidator, field=IEventBasic['end'])
provideAdapter(EndMyObjectValidator)

在我的类型文件（profiles / default / types下的my.object.myobject.xml）中，将行为放在行为部分中。

<behaviors>
    <element value="plone.app.event.dx.behaviors.IEventBasic"/>
</behaviors>

问题在于它可以验证任何Event对象或实现IEventBasic接口/架构的任何对象中的end字段。

我想也许是因为Plone文档说WidgetValueDiscriminators的参数'view'和'context'接受了一个接口，所以我可以这样做：

validator.WidgetValidatorDiscriminators(EndMyObjectValidator, view=IMyObject, field=IEventBasic['end'])

要么

validator.WidgetValidatorDiscriminators(EndMyObjectValidator, context=IMyObject,field=IEventBasic['end']

不幸的是，这些根本没有触发。 我想我误解了上下文和视图参数的实际作用。 我怎样才能使验证器专门用于处理MyObject？

来源： http : //docs.plone.org/develop/addons/schema-driven-forms/customising-form-b​​ehaviour/validation.html

现在我正在做：

...
from gpcl.container.my_container import MyContainer

...

class EndMyObjectValidator(validator.SimpleFieldValidator):

    def validate(self,value):
        if self.widgets.form.portal_type <> 'my.object.myobject':
            return

        ...

validator.WidgetValueDiscriminators(EndMyObjectValidator, field=IEventBasic['end'])
provideAdapter(EndMyObjectValidator)

更新2：我之前删除了我的评论，因为这是一个不相关的问题。 我更改了检查类型的方式。

Answer 1

好的，注册您自己的添加表单并将“默认敏捷添加表单”子类化。 有关在操作处理程序和自定义添加表单中进行 验证的更多信息

在我的task.py （Contenttype等...）中：

# -*- coding: utf-8 -*-
from zope.interface import implementer
from zope.interface import Invalid
from z3c.form import button
from z3c.form import validator
from z3c.form import util
from z3c.form.interfaces import ActionExecutionError
from z3c.form.interfaces import WidgetActionExecutionError
from plone.dexterity.content import Item
from plone.dexterity.browser import add
from viisionar.training.interfaces import ITask
from Products.statusmessages.interfaces import IStatusMessage
from my.addon import _

@implementer(ITask)
class Task(Item):
    pass

class AddForm(add.DefaultAddForm):

    portal_type = 'Task'

    def __init__(self, context, request, ti=None):
        super(AddForm, self).__init__(context, request, ti=None)

    @button.buttonAndHandler(_('Save'), name='save')
    def handleAdd(self, action):

        print "Handle Add"
        data, errors = self.extractData()

        if errors:
            self.status = self.formErrorsMessage
            return

        # Your Custom validation

        # Debug Do what yo want

        print data

        if error:
            """
            # Global Portal Message
            raise ActionExecutionError(Invalid(_(u"Please provide a valid end date")))

            # or

            # Error Message in Widget
            raise WidgetActionExecutionError('IEventBasic.end', Invalid(u"Please put the the right end date"))
            """
        # /Your Custom validation

        obj = self.createAndAdd(data)

        if obj is not None:
            # mark only as finished if we get the new object
            self._finishedAdd = True
            IStatusMessage(self.request).addStatusMessage(
                self.success_message, "info"
            )

class AddView(add.DefaultAddView):
    form = AddForm

在我的configure.zcml我注册了自定义添加表单

<adapter
    for="
        Products.CMFCore.interfaces.IFolderish
        zope.publisher.interfaces.browser.IDefaultBrowserLayer
        plone.dexterity.interfaces.IDexterityFTI"
    provides="zope.publisher.interfaces.browser.IBrowserPage"
    factory="my.addon.task.AddView"
    name="Task" />

<class class="my.addon.task.AddView">
    <require
        permission="cmf.AddPortalContent"
        interface="zope.publisher.interfaces.browser.IBrowserPage"/>
</class>

在我的task.xml定义中：

<property name="factory">Task</property>
<property name="schema">my.addon.interfaces.ITask</property>
<property name="klass">my.addon.task.Task</property>
<property name="behaviors">
  <element value="plone.app.content.interfaces.INameFromTitle" />
  <element value="plone.app.event.dx.behaviors.IEventBasic"/>
</property>