Source code is not generated if api spec doesn't have "schemas"

[yyamano]

If API spec doesn't have "schemas" section, fastapi-code-generator doesn't generate source code.

Here is the api spec file "upload.yaml".

openapi: "3.0.0"
info:
  version: 1.0.0
  title: Swagger Petstore
  license:
    name: MIT
  description: API definiton for testing file upload

servers:
  - url: http://petstore.swagger.io/v1
paths:
  /pets/{petId}/image:
    post:
      summary: Upload image for a pet
      operationId: uploadPetImage
      tags:
        - pets
      parameters:
        - name: petId
          in: path
          required: true
          description: The id of the pet
          schema:
            type: string
      requestBody:
        content:
          application/octet-stream:
            schema:
              type: string
              format: binary
      responses:
        '201':
          description: empty response

You can reproduce the problem as below.

C:\Users\yyamano\work\fastapi-code-generator>poetry run python fastapi_code_generator -i tests\data\openapi\default_template\upload.yaml -o tmp

C:\Users\yyamano\work\fastapi-code-generator>ls -l tmp
total 0

C:\Users\yyamano\work\fastapi-code-generator>poetry run python fastapi_code_generator -i tests\data\openapi\default_template\simple.yaml -o tmp

C:\Users\yyamano\work\fastapi-code-generator>ls -l tmp
total 5
-rw-r--r-- 1 yyamano 1049089 1183 Aug  9 16:13 main.py
-rw-r--r-- 1 yyamano 1049089  496 Aug  9 16:13 models.py

[yyamano]

Duplicate of #222