Wigtail Custom API

Question

我正在尝试使用Wagtail API来提供我的D3插件。我想发送嵌套的ClusterableModels的JSON输出。我在models.py中创建了两组Snippets。一个是包含节点的图形，另一个是嵌套节点的图形：

@register_snippet 
class Graph(ClusterableModel):
  name = models.CharField(max_length=255)

  panels = [
    FieldPanel('name'),
    InlinePanel('graph_nodes', label='Select Nodes'),
]

  def __str__(self):
    return '{}'.format(self.name)
  class Meta:
    verbose_name = 'Graph'
    verbose_name_plural = 'Graphs'

@register_snippet
class Node(ClusterableModel, Orderable):

  name = models.CharField(max_length=255)
  body = models.TextField(blank=True, null=True)

  panels = [
    FieldPanel('name'),
    FieldPanel('body'),
    InlinePanel('node_to_node' , label='connect to ...'),
]

  def __str__(self):
    return '{} ({} links)'.format(self.name, self.node_to_node.count())

class NodeRelations(Orderable, ClusterableModel):
  parent = ParentalKey(Node, related_name='node_to_node', null=True,  blank=True)
  node = models.ForeignKey(Node, related_name="+",
                         on_delete=models.CASCADE, blank=True, null=True)

panels = [
    SnippetChooserPanel('node'),
]

class GraphNodeRelations(Orderable):
  parent = ParentalKey(Graph, related_name='graph_nodes', null=True, blank=True)
  node = models.ForeignKey(Node, related_name='+',
                         on_delete=models.SET_NULL, blank=True, null=True)

  panels = [
    SnippetChooserPanel('node'),
]

问题是Wagtail没有ClusterableModel或Snippets的标准API。但是，它使用“BaseAPIEndpoint”提供自定义endpoints。我成功地找到了内置的“PagesAPIEndpoint”代码，该代码可以提供有关该过程的洞察力，但我很难想出一个简单地获取所请求的图形（我的图形）及其嵌套子节点（节点）的工作代码