how to use url_for() to pass data to another route? fastapi & jinja2

I want to call a fastapi route from jinja2 template and pass data to the called route. All my attempts fail. I tried something in the jinja2 template like {{ url_for('function1', uustr=data.uustr, interval=1) }}

this is the fastapi route I want to call (syntax simplified for demo purposes):

@app.get("/updates/data/{uustr}",response_class=HTMLResponse)
async def function1(request: Request, uustr:str, interval:int):

  return"""
<html>
    <head>
        <title>{{ uustr }}</title>
    </head>
    <body>
        <h1>{{ interval }}</h1>
    </body>
</html>
"""

I get this error:

    raise ValueError('context must include a "request" key') 
ValueError: context must include a "request" key

Does anybody have an idea?

Solution 1:

I found a very easy solution without using url_for()

In case someone coming from flask world has a similar problem here my solution: I created a simple HTML button in my jinja2 template:

<button onclick="myFunction()">pass data to route</button>

and I created a very simple javascript function for passing data to route:

<script>
function myFunction() {
  window.location.href = "/updates/data/{{data.uustr}}?interval=2";
}
</script>

that's it.

how to use url_for() to pass data to another route? fastapi & jinja2

Solution 1:

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