如何创建具有多个模式的z3c.form？

Question

我正在使用cms Plone构建一个包含另外两个模式的表单。

使用群形，我已经能够包含这两个模式的两个字段。但是，当我使用datagridfield构建表时，它们会丢失所有属性，比如隐藏属性。我想要做的是让这两个表单都有它们的字段，并且在保存时能够将它们保存在链接被单击为父->对象1的对象中，该对象位于窗体的->对象2底部。

下面是我的python代码：

class QuestionPart(group.Group):
    label = u'Question Part'
    fields = field.Fields(IQuestionPart)
    template = ViewPageTemplateFile('questionpart_templates/view.pt')

 class Question(group.Group):
     label = u'Question'
     fields = field.Fields(IQuestion)
     template = ViewPageTemplateFile('question_templates/view.pt')

class QuestionSinglePart(group.GroupForm, form.AddForm):
    grok.name('register')
    grok.require('zope2.View')
    grok.context(ISiteRoot)
    label = u"Question with Single Part"

    ignoreContext = True
    enable_form_tabbing  = False

    groups = (Question,QuestionPart)

def update(self):
    super(QuestionSinglePart, self).update()

这段代码显示IQuestion、IQuestionPart的两个字段，而不考虑诸如:form.mode(contype=‘隐含’)或DataGridField小部件。我找到了一种用字段提示显示正确表单的方法。

class QuestionSinglePart(AutoExtensibleForm, form.AddForm):
    grok.require('zope2.View')
    grok.context(ISiteRoot)

    label = u"Question"
    schema = IQuestion
    additionalSchemata = (IQuestionPart,)                             

我觉得我还有很长的路要走。我和一些人谈过了。我现在尝试使用单独的表单和视图。

到目前为止，我的代码是：

class QuestionSinglePartForm(AutoExtensibleForm, form.Form):

    ignoreContext = True

    autoGroups = True
    template = ViewPageTemplateFile('questionsinglepart_templates/questionsinglepartform.pt')

    @property
    def additionalSchemata(self):
        return self._additionalSchemata

    def __init__(self, context, request, schema, additional=()):
        self.context = context
        self.request = request
        if not IInterface.providedBy(schema):
            raise ValueError('Schema is not interface object')
        self._schema = schema
        if not all(IInterface.providedBy(s) for s in additional):
            raise ValueError('Additional schema is not interface')
        self._additionalSchemata = additional

class QuestionSinglePartView(object):

    schema = IQuestion
    additional = (IQuestionPart,)

    def __init__(self, context, request):
        self.context = context
        self.request = request
        self.form = QuestionSinglePartForm(context, request, self.schema, self.additional)

    def magic(self, data, errors):
        pass
        """
        question = Question()
        question.number = data['number']
        question.questionContent = data['questionContent']

        questionPart = QuestionPart()
        questionPart.typeOfQuestion = data['IQuestionPart.typeOfQuestion']
        questionPart.explanation = data['IQuestionPart.explanation'] 
        questionPart.fileSize = data['IQuestionPart.fileSize']
        questionPart.fileType = data['IQuestionPart.fileType']
        questionPart.hints = data['IQuestionPart.hints']
        questionPart.table = data['IQuestionPart.table']
        questionPart.contype = data['IQuestionPart.contype']
        questionPart.content = data['IQuestionPart.content']
        """

    def update(self, *args, **kwargs):
        if self.request.get('REQUEST_METHOD') == 'POST':
            data, errors = self.form.extractData()
            self.magic(data, errors)
        self.formdisplay = self.form.render()

    def __call__(self, *args, **kwargs):
        self.update(*args, **kwargs)
        return self.index(*args, **kwargs)

我正在为表单的呈现而挣扎，而且QuestionSinglePart对象没有索引属性。

经过几个小时的工作与一些开发人员，我们已经弄清楚了发生了什么。

我忽略了：

    @property
    def schema(self):
        return self._schema

我需要在视图中定义如下索引：

index = ViewPageTemplateFile('questionsinglepart_templates/questionsinglepart.pt')

我需要将它添加到视图init中。

alsoProvides(self.form, IWrappedForm)

在视图的update方法中，我需要在格式显示之前调用它。我还可以删除数据提取并将其移动到表单中。

def update(self, *args, **kwargs):
    self.form.update(*args, **kwargs)
    self.formdisplay = self.form.render()

我目前仍在努力将数据保存到对象中。

Answer 1

这是我的最后一段代码，上面做了一些修改。对象的索引存在问题。我需要创建一个简单的自定义视图。我忘记了表单上模式的属性。我还需要更改视图的更新方法。

class QuestionSinglePartForm(AutoExtensibleForm, form.Form):

    ignoreContext = True

    autoGroups = False

    @property
    def schema(self):
        return self._schema

    @property
    def additionalSchemata(self):
        return self._additionalSchemata

    def __init__(self, context, request, schema, additional=()):
        self.context = context
        self.request = request
        if not IInterface.providedBy(schema):
            raise ValueError('Schema is not interface object')
        self._schema = schema
        if not all(IInterface.providedBy(s) for s in additional):
            raise ValueError('Additional schema is not interface')
        self._additionalSchemata = additional

    @button.buttonAndHandler(u'Save')
    def handleSave(self, action):
        data, errors = self.extractData()
        if errors:
            return False
        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(_(u"Changes saved"), "info")
        print data

    @button.buttonAndHandler(u'Cancel')
    def handleCancel(self, action):
        print 'cancel'



class QuestionSinglePartView(object):

    schema = IQuestion
    additional = (IQuestionPart,)
    index = ViewPageTemplateFile('questionsinglepart_templates/questionsinglepart.pt')

    def __init__(self, context, request):
        self.context = context
        self.request = request
        self.form = QuestionSinglePartForm(context, request, self.schema, self.additional)
        alsoProvides(self.form, IWrappedForm)

    def magic(self, data, errors):
        pass
        """
        question = Question()
        question.number = data['number']
        question.questionContent = data['questionContent']

        questionPart = QuestionPart()
        questionPart.typeOfQuestion = data['IQuestionPart.typeOfQuestion']
        questionPart.explanation = data['IQuestionPart.explanation'] 
        questionPart.fileSize = data['IQuestionPart.fileSize']
        questionPart.fileType = data['IQuestionPart.fileType']
        questionPart.hints = data['IQuestionPart.hints']
        questionPart.table = data['IQuestionPart.table']
        questionPart.contype = data['IQuestionPart.contype']
        questionPart.content = data['IQuestionPart.content']
        """

    def update(self, *args, **kwargs):
        self.form.update(*args, **kwargs)
        self.formdisplay = self.form.render()

    def __call__(self, *args, **kwargs):
        self.update(*args, **kwargs)
        return self.index(*args, **kwargs)

Answer 2

只有包含plone.autoform.base.AutoExtensibleForm混联的表单类才会注意模式表单提示。尝试将其用作Group类的混合器(并提供此混合器所寻找的schema属性，而不是fields)：

from plone.autoform.base import AutoExtensibleForm

class QuestionPart(AutoExtensibleForm, group.Group):
    label = u'Question Part'
    schema = IQuestionPart
    template = ViewPageTemplateFile('questionpart_templates/view.pt')