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Project description
fastapi-code-generator
This code generator creates FastAPI app from an openapi file.
This project is an experimental phase.
fastapi-code-generator uses datamodel-code-generator to generate pydantic models
Help
See documentation for more details.
Installation
To install fastapi-code-generator
:
$ pip install fastapi-code-generator
Usage
The fastapi-code-generator
command:
Usage: fastapi-codegen [OPTIONS]
Options:
-i, --input FILENAME [required]
-o, --output PATH [required]
-t, --template-dir PATH
--install-completion Install completion for the current shell.
--show-completion Show completion for the current shell, to copy it
or customize the installation.
--help Show this message and exit.
Example
OpenAPI
$ fastapi-codegen --input api.yaml --output app
api.yaml
```yaml
openapi: "3.0.0"
info:
version: 1.0.0
title: Swagger Petstore
license:
name: MIT
servers:
- url: http://petstore.swagger.io/v1
paths:
/pets:
get:
summary: List all pets
operationId: listPets
tags:
- pets
parameters:
- name: limit
in: query
description: How many items to return at one time (max 100)
required: false
schema:
type: integer
format: int32
responses:
'200':
description: A paged array of pets
headers:
x-next:
description: A link to the next page of responses
schema:
type: string
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
x-amazon-apigateway-integration:
uri:
Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${PythonVersionFunction.Arn}/invocations
passthroughBehavior: when_no_templates
httpMethod: POST
type: aws_proxy
post:
summary: Create a pet
operationId: createPets
tags:
- pets
responses:
'201':
description: Null response
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
x-amazon-apigateway-integration:
uri:
Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${PythonVersionFunction.Arn}/invocations
passthroughBehavior: when_no_templates
httpMethod: POST
type: aws_proxy
/pets/{petId}:
get:
summary: Info for a specific pet
operationId: showPetById
tags:
- pets
parameters:
- name: petId
in: path
required: true
description: The id of the pet to retrieve
schema:
type: string
responses:
'200':
description: Expected response to a valid request
content:
application/json:
schema:
$ref: "#/components/schemas/Pets"
default:
description: unexpected error
content:
application/json:
schema:
$ref: "#/components/schemas/Error"
x-amazon-apigateway-integration:
uri:
Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${PythonVersionFunction.Arn}/invocations
passthroughBehavior: when_no_templates
httpMethod: POST
type: aws_proxy
components:
schemas:
Pet:
required:
- id
- name
properties:
id:
type: integer
format: int64
name:
type: string
tag:
type: string
Pets:
type: array
items:
$ref: "#/components/schemas/Pet"
Error:
required:
- code
- message
properties:
code:
type: integer
format: int32
message:
type: string
```
app/main.py
:
# generated by fastapi-codegen:
# filename: api.yaml
# timestamp: 2020-06-14T10:45:22+00:00
from __future__ import annotations
from typing import Optional
from fastapi import FastAPI
from .models import Pet, Pets
app = FastAPI()
@app.get('/pets', response_model=Pets)
def list_pets(limit: Optional[int] = None) -> Pets:
pass
@app.post('/pets', response_model=None)
def create_pets() -> None:
pass
@app.get('/pets/{pet_id}', response_model=Pet)
def show_pet_by_id(pet_id: str) -> Pet:
pass
app/models.py
:
# generated by datamodel-codegen:
# filename: api.yaml
# timestamp: 2020-06-14T10:45:22+00:00
from typing import List, Optional
from pydantic import BaseModel
class Pet(BaseModel):
id: int
name: str
tag: Optional[str] = None
class Pets(BaseModel):
__root__: List[Pet]
class Error(BaseModel):
code: int
message: str
PyPi
https://pypi.org/project/fastapi-code-generator
License
fastapi-code-generator is released under the MIT License. http://www.opensource.org/licenses/mit-license
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