fastapi header parameters

You can define Header parameters the same way you define Query, Path and Cookie parameters. Import Header Python 3.6 full codes from typing import Union from fastapi import FastAPI, Header app = FastAPI()

fastapi handling errors

There are many situations in where you need to notify an error to a client that is using your API. This client could be a browser with a frontend, a code from someone else, an IoT device, etc.

fastapi extra data types

Up to now, you have been using common data types, like: int float str bool But you can also use more complex data types. And you will still have the same features as seen up to now: Great editor support. Data conversion from incoming requests.

fastapi json encoder

There are some cases where you might need to convert a data type (like a Pydantic model) to something compatible with JSON (like a dict, list, etc). For example, if you need to store it in a database. For that, FastAPI provides a jsonable_encoder() func

fastapi debugging

You can connect the debugger in your editor, for example with Visual Studio Code or PyCharm. Call uvicorn In your FastAPI application, import and run uvicorn directly: import uvicorn from fastapi import FastAPI

fastapi cookie parameters

You can define Cookie parameters the same way you define Query and Path parameters. Import Cookie example: from typing import Union from fastapi import Cookie, FastAPI

fastapi request body

When you need to send data from a client (let's say, a browser) to your API, you send it as a request body. A request body is data sent by the client to your API. A response body is the data your API sends to the client

fastapi body nested models

With FastAPI, you can define, validate, document, and use arbitrarily deeply nested models (thanks to Pydantic). List fields List fields example from typing import Union from fastapi import FastAPI from pydantic import BaseModel app = FastAPI()

fastapi body multiple parameters

Now that we have seen how to use Path and Query, let's see more advanced uses of request body declarations. Mix Path, Query and body parameters example1 from typing import Union from fastapi import FastAPI, Path from pydantic import BaseModel app = Fa

fastapi body fields

Body - Fields The same way you can declare additional validation and metadata in path operation function parameters with Query, Path and Body, you can declare validation and metadata inside of Pydantic models using Pydantic's Field. Import Field First