AttributeError: 'NoneType' object has no attribute 'keys'

[hackoffme]

Hello. Please help :) The error occurs only if the subcategory is empty. Adding "nullable: true" didn't help

        parameters={'id': callback_data.category})```



```Cause exception while process update
AttributeError: 'NoneType' object has no attribute 'keys'
Traceback (most recent call last):
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\dispatcher.py", line 277, in _process_update  
    response = await self.feed_update(bot, update, **kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\dispatcher.py", line 135, in feed_update      
    response = await self.update.wrap_outer_middleware(
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\middlewares\error.py", line 24, in __call__   
    return await handler(event, data)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\middlewares\user_context.py", line 23, in __call__
    return await handler(event, data)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\fsm\middleware.py", line 34, in __call__
    return await handler(event, data)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\event\telegram.py", line 248, in trigger      
    return await wrapped_inner(event, kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\event\handler.py", line 38, in call
    return await wrapped()
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\dispatcher.py", line 244, in _listen_update   
    return await self.propagate_event(update_type=update_type, event=event, **kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\router.py", line 128, in propagate_event      
    return await observer.wrap_outer_middleware(_wrapped, event=event, data=kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\router.py", line 124, in _wrapped
    return await self._propagate_event(
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\router.py", line 144, in _propagate_event     
    response = await router.propagate_event(update_type=update_type, event=event, **kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\router.py", line 128, in propagate_event      
    return await observer.wrap_outer_middleware(_wrapped, event=event, data=kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\router.py", line 124, in _wrapped
    return await self._propagate_event(
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\router.py", line 137, in _propagate_event     
    response = await observer.trigger(event, **kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\event\telegram.py", line 248, in trigger      
    return await wrapped_inner(event, kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\aiogram\dispatcher\event\handler.py", line 38, in call
    return await wrapped()
  File "D:\work\delivery_bot\handlers\menu.py", line 45, in category
    cat = api_io.call_listProductsSerializers(
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\openapi.py", line 253, in __call__
    return self.operation(self.base_url, *args, security=self.security, **kwargs)
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\paths.py", line 392, in request
    return expected_media.schema.model(result.json())
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\schemas.py", line 159, in model
    return [self.items.get_type()(i, self.items) for i in data]
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\schemas.py", line 159, in <listcomp>
    return [self.items.get_type()(i, self.items) for i in data]
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\schemas.py", line 299, in __init__
    setattr(self, k, object_schema.model(v))
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\schemas.py", line 161, in model
    return self.get_type()(data, self)
  File "d:\work\delivery_bot\env\lib\site-packages\openapi3\schemas.py", line 284, in __init__
    keys = set(data.keys()) - frozenset(self.__slots__)
AttributeError: 'NoneType' object has no attribute 'keys'

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/vnd.oai.openapi
Vary: Accept

openapi: 3.0.2
info:
  title: api for tbot
  version: 1.0.0
  description: api for viewing and ordering goods
paths:
  /api/v1/menu/:
    get:
      operationId: listProducts
      description: ''
      parameters: []
      responses:
        '200':
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Productss'
          description: ''
      tags:
      - api
  /api/v1/menu/{id}/:
    get:
      operationId: retrieveProducts
      description: ''
      parameters:
      - name: id
        in: path
        required: true
        description: "A unique integer value identifying this \u0411\u043B\u044E\u0434\
          \u043E."
        schema:
          type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Productss'
          description: ''
      tags:
      - api
  /api/v1/category/{id}/:
    get:
      operationId: listProductsSerializers
      description: ''
      parameters:
      - name: id
        in: path
        required: true
        description: ''
        schema:
          type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Productss'
          description: ''
      tags:
      - api
  /api/v1/categories/:
    get:
      operationId: listCategories
      description: ''
      parameters: []
      responses:
        '200':
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Categorys'
          description: ''
      tags:
      - api
components:
  schemas:
    Productss:
      type: object
      properties:
        id:
          type: integer
          readOnly: true
        subcategory:
          type: object
          properties:
            id:
              type: integer
              readOnly: true
              nullable: true
            name:
              type: string
              readOnly: true
              nullable: true
            slug:
              type: string
              readOnly: true
              nullable: true
              pattern: ^[-a-zA-Z0-9_]+$
          readOnly: true
          nullable: true
        name:
          type: string
          maxLength: 200
        slug:
          type: string
          maxLength: 200
          pattern: ^[-a-zA-Z0-9_]+$
        description:
          type: string
        price:
          type: string
          format: decimal
          multipleOf: 0.01
          maximum: 100000000
          minimum: -100000000
        image:
          type: string
          format: binary
        aviable:
          type: boolean
        created:
          type: string
          format: date-time
          readOnly: true
        updated:
          type: string
          format: date-time
          readOnly: true
        category:
          type: object
          properties:
            id:
              type: integer
              readOnly: true
            name:
              type: string
              maxLength: 200
            slug:
              type: string
              maxLength: 200
              pattern: ^[-a-zA-Z0-9_]+$
          required:
          - name
          - slug
          readOnly: true
      required:
      - name
      - slug
      - price
      - image
    Categorys:
      type: object
      properties:
        id:
          type: integer
          readOnly: true
        name:
          type: string
          maxLength: 200
        slug:
          type: string
          maxLength: 200
          pattern: ^[-a-zA-Z0-9_]+$
      required:
      - name
      - slug