Home project - Flutter how to override custom_model?

[Codarax]

Hello everyone,

I am working on a Flutter application and am trying to implement dynamic routing, allowing users to choose options like “avoid motorways” without creating a separate profile for each choice on the server. I want to pass these routing preferences from the app to the GraphHopper API using a custom_model .

I have defined the following profile in my config.yml :

- name: mycustom
  custom_model: {
    "speed": [
      { "if": "true", "limit_to": "car_average_speed" }
    ]
  }
  weighting: custom
  routing.ch.disabling_allowed: true

From my Flutter app, I am attempting to generate a route with the following URL, which includes a custom_model to avoid motorways:

https://localhost:8989/route?point=51.67734,5.0612677&point=52.0907006,5.1215634&profile=mycustom&custom_model=%7B%22priority%22%3A%5B%7B%22if%22%3A%22road_class%3D%3DMOTORWAY%22%2C%22multiply_by%22%3A%220.0%22%7D%5D%7D

My issue is that this custom_model seems to be ignored. The route calculation still uses motorways, as if the custom rules are not being applied. I have tried clearing the graph cache and restarting the server, but the behavior remains unchanged.

This leads me to a few questions:

1. What is the best practice for a client-side application (like Flutter) to dynamically send routing rules?
2. How can I ensure that the custom_model parameter in my API request successfully overrides the default rules of my mycustom profile?
3. Are there specific examples of this use case, or perhaps a more reliable method for achieving this?

Any insights into why my custom_model might be ignored and how to fix it would be greatly appreciated.

Thank you in advance for your help!

[karussell]

You need to use the POST request. The endpoint GET /route does not support the custom_model parameter.

[Codarax]

Looks like that was the trick! Probleem is solved after I used the POST request! Thanks Karussell.