Django-CMS 子插件显示来自数据库表的过滤数据

Question

我有两个插件 ProductSelector(parent) 和 SpecificationSelector(child)。我想设置孩子，以便当您将其添加到父级时，显示的规格是产品（父级）的唯一规格。现在它从表格中提取所有规格。这些行让我过滤数据以获得我想要的。

编辑：我发现我在代码中修复了一个错误。我的 PluginBase 名称与模型相同。这允许我在子级中使用 ProductSelector.objects.get(cmsplugin_ptr=instance.parent) 来获取父级实例。我仍然需要弄清楚如何将过滤后的规范列表传递给“PluginAdmin Interface”

    product = ProductSelector.objects.get(cmsplugin_ptr=instance.parent)
    specification = Specifications.objects.filter(product_name__product_name__iexact = product.product_name)

但是，我还没有弄清楚如何将过滤后的列表发送到插件管理界面。

class ProductSelectorPlugin(CMSPluginBase):
    model = ProductSelector
    name = "Product Selector"
    render_template = "product_selector.html"
    allow_children = True
    child_classes = ['SpecificationSelectorPlugin'] 

    def render(self, context, instance, placeholder):

        context['instance'] = instance
        return context

plugin_pool.register_plugin(ProductSelectorPlugin)

class SpecificationSelectorPlugin(CMSPluginBase):
    model = SpecificationSelector   
    render_template = "specification_selector.html"
    formfield_overrides = {models.ManyToManyField: {'widget': CheckboxSelectMultiple},}

    def render(self, context, instance, placeholder):
        product = ProductSelector.objects.get(cmsplugin_ptr=instance.parent)
        specification = Specifications.objects.filter(product_name__product_name__iexact = product.product_name)
        context['instance'] = instance
        return context

plugin_pool.register_plugin(SpecificationSelectorPlugin)

models.py

class ProductSelector(CMSPlugin):
    product_name = models.ForeignKey(Product, help_text = "Select the product you want to place")
    new_product = models.BooleanField(blank=True)


class SpecificationSelector(CMSPlugin):
    specification = models.ManyToManyField(Specifications, blank=True)

    def __unicode__(self): 
        return unicode(self.specification)

这是占位符中 Django-cms 插件的屏幕截图。目前它在表格中显示所有规格，但我只希望它是该特定产品的规格。

http://imgur.com/3R1LobC

提前感谢您的帮助。

Answer 1

CMSPluginBase 继承自 ModelAdmin，这意味着您可以在添加和编辑插件时覆盖呈现的表单。

所以你可以像这样创建一个ModelForm 子类：

class SpecificationSelectorPluginForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super(SpecificationSelectorPluginForm, self).__init__(*args, **kwargs)
        if self.instance.parent_id:
            # Assume that the parent is a product instance
            parent_plugin = self.instance.parent
            product = parent_plugin.get_plugin_instance()[0]

            if product:
                # It's possible that product is an orphan plugin.

                specifications = Specifications.objects.filter(
                    product_name__product_name__iexact=product.product_name)
                self.fields['specification'].queryset = specifications

然后更改您的 SpecificationSelectorPlugin 以使用此表单，如下所示：

class SpecificationSelectorPlugin(CMSPluginBase):
    form = SpecificationSelectorPluginForm

仅当规范插件是产品插件的直接子级时，上述方法才有效。