其他 - 当过滤器字符串为空时，如何停止Graphql + Django-Filters返回所有对象？

这是我在GraphiQL和Frontend VUE中使用的解决方案。我添加了一个逻辑到Birds2Query与 def resolve_all_birds2每个过滤器（对所有过滤器不是测试目的）。除此之外，我还增加了一个ExtendedConnection计数。

注意：我从以前的问题中更改了类名。

relay_schema.py

class ExtendedConnection(Connection):
    class Meta:
        abstract = True

    total_count = Int()
    edge_count = Int()
    name_check = ""

    def resolve_total_count(root, info, **kwargs):
        return root.length
    def resolve_edge_count(root, info, **kwargs):
        return len(root.edges)

class Birds2Node(DjangoObjectType):
    class Meta:

        model = Birds
        filter_fields =  {
            'id':  ['exact', 'icontains'],
            'name': ['exact', 'icontains', 'istartswith', 'iendswith'],
        }

        interfaces = (relay.Node, )
        connection_class = ExtendedConnection

class Birds2Query(ObjectType):
    birds2 = relay.Node.Field(Birds2Node)
    all_birds2 = DjangoFilterConnectionField(Birds2Node)


    def resolve_all_birds2(self, info, **kwargs):
        # Filtering for Empty/ Blank Values in Filter.Key.Value before returning queryset
         if 'name__icontains' in kwargs:
            nameIcon = kwargs['name__icontains']
            nameIconBool = bool(nameIcon.strip()) # if blanks turns False           
            if nameIconBool == False: # has blanks         
                return Birds.objects.filter(name=None)
            pass


        if 'name__istartswith' in kwargs:           
            nameIsta = kwargs['name__istartswith']
            nameIstaBool = bool(nameIsta.strip()) # if blanks turns False          
            if nameIstaBool == False: # has blanks         
                return Birds.objects.filter(name=None)
            pass
         return

GraphiQL 大段引用

例子1

query {allBirds2 (name_Icontains:""){
  totalCount
    edgeCount
    edges {
      node {
        id
        name
        habitat
      }  
    }
  }
}

过滤器为空时停止返回所有对象。

{
  "data": {
    "allBirds2": {
      "totalCount": 0,
      "edgeCount": 0,
      "edges": []
    }
  }
}

示例2，带空格和一个字母

query {allBirds2 (name_Icontains:" f  "){
  totalCount
    edgeCount
    edges {
      node {
        id
        name
        habitat
      }  
    }
  }
}

返回-正是我想要的

{
  "data": {
    "allBirds2": {
      "totalCount": 1,
      "edgeCount": 1,
      "edges": [
        {
          "node": {
            "id": "QmlyZHMyTm9kZTox",
            "name": "Finch",
            "habitat": "Europe"
          }
        }
      ]
    }
  }
}