validation - Plone - 如何让验证器根据特定内容类型的行为验证字段？

Question

我正在使用 Plone 4.3，并且我有一个 form.SchemaForm plone.directives 有一个接口(interface)，该接口(interface)具有来自 IEventBasic 的起始字段和一个验证器:

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，我将行为放在行为部分中。

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

问题是它验证任何 Event 对象或任何实现 IEventBasic 接口(interface)/架构的对象中的结束字段。

我想也许因为 Plone 文档说 WidgetValueDiscriminators 的参数“view”和“context”接受一个接口(interface)，那么我可以这样做:

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

或

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

不幸的是，这些都没有触发。我想我误解了上下文和 View 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-behaviour/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，因为它是针对一个不相关的问题。 我改变了检查类型的方式。

Answer 1

好的，注册您自己的添加表单并子类化默认敏捷添加表单。有关 Validating in action handlers 的更多信息和 Custom Add Forms

在我的task.py中(内容类型等...):

# -*- 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中，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中定义:

<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>