FastAPI - Field required, missing value
Question
I receive the error below, when I deploy my app to Heroku:
{
"detail": [
{
"loc": [
"body",
"id"
],
"msg": "field required",
"type": "value_error.missing"
}
]
}
and log in the console:
22-03-05T19:45:12.863425+00:00 heroku[router]: at=info method=GET path="/" host=wallet-reputation.herokuapp.com request_id=51780a1f-491a-4dd6-a8c0-164b41745405 fwd="95.175.20.47" dyno=web.1 connect=0ms service=4ms status=422 bytes=248 protocol=http
This is my Fastapi app:
@app.get("/")
def index(request: Request, id: str = Form(...)):
return templates.TemplateResponse("main_page.html", context={"request": request})
That's how my HTML file looks like:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.1.3/dist/css/bootstrap.min.css"
integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<title>Main Page</title>
</head>
<body>
<form method="get">
<center>
<div class="form-group col-lg-4">
<label for="walletAdress">Natluk Coin Reputation Wallet</label>
<input type="text" class="form-control" id="walletAdress" aria-describedby="walletlHelp"
placeholder="Wallet address" style="text-align: center" name="id">
</div>
</center>
<center>
<a class="btn btn-primary" type="submit" role="button"
href="https://wallet-reputation.herokuapp.com/wallet/{{ id }}">Check Wallet</a>
<a class="btn btn-primary" type="submit" role="button"
href="https://wallet-reputation.herokuapp.com/wallet/run/{{ id }}">Create Wallet</a>
</center>
</html>
So the logic is that, when I access my "/" endpoint I post the string into form, and then I click one of the buttons, which starts running the endpoint with variable from form.
1 answers
solution1
0 ACCPTED 2022-03-05 20:14:05
Update
Below is an example of how to submit a value through form, and how your endpoint should look like:
from fastapi import FastAPI, Request, status, Form
from fastapi.responses import HTMLResponse
app = FastAPI()
@app.get('/', response_class=HTMLResponse)
async def event_create_form(request: Request):
html_content = """
<html>
<body>
<form method="POST" action="/submit">
<input type="text" name="id">
<input type="submit" value="Create Event">
</form>
</body>
</html>
"""
return HTMLResponse(content=html_content, status_code=200)
@app.post('/submit')
async def event_create(id: int = Form(...)):
return {"id": id}
Original answer
You are submitting id as path parameter, but your endpoint expects it to be a body ( Form ) parameter. Thus, you should change your endpoint as shown below, so that id is expected as path parameter:
@app.get("/{id}")
def index(request: Request, id: str):
...
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