Visualize FastAPI endpoints with FastAPI-Voyager(www.newsyeah.fun)
118 pointsby tank-34a day ago7 comments
  • brulard21 hours ago
    I would appreciate some quick info what this is all about. Clicking on link presents me with a huge diagram i know nothing about. What am I looking at?
    • tank-3421 hours ago
      this project is inspired by https://apis.guru/graphql-voyager/, which visualize the entity relationships based on graphviz and add fancy ui effects.

      fastapi-voyager, from left to right, is tag, routes(apis) and response_models, it indicates the internal relationship between routes, which can help developers/PO easily figure out the data structure.

      • agumonkey21 hours ago
        Pretty nice
      • tonyhart721 hours ago
        ok, how is this better than OpenAPI schema???
        • tank-3421 hours ago
          in swagger, from the definition of schema you are not able to easily figure out the related class, the name is marked as <object> or array<object>

          in voyager their relationships are visualized and very close to the source code.

          • Noumenon7218 hours ago
            What are the files like router.sample_1.schema? Is that a convention you use for your Pydantic models or something generated by OpenApi?
            • tank-3412 hours ago
              https://github.com/allmonday/composition-oriented-developmen...

              those are clusters based on modules, you can swith off by toggle 'show module cluster'

              • Noumenon7210 hours ago
                So this isn't really "visualize FastAPI endpoints", it's "visualize the inheritance cascade caused by using the pydantic-resolve approach to data fetching/transformation, which involves adding post-hooks to compositions of Pydantic objects". A vanilla FastAPI user like myself is going to have trouble understanding it without realizing how tied it is to that framework.
                • nine_k9 hours ago
                  While at it, what do you use to parse / validate / cast request data into nice typechecked objects?
                • tank-349 hours ago
                  it's not bound with pydantic-resolve, for vanilla fastapi user if the business model are well designed and composed, it can benefited from this visualization approach too.

                  the goal is to make the dependencies clear for developers, and figure out the potential impacts from one node to others.

                  pydantic-resolve is just another my project to make the process of data composition close to ER model and get rid of glue codes like 'for loops'.

  • jmpeax11 hours ago
    There has to be a better way to view this than the tangled web of overlapping lines, like that at lower left of the "services" rectangle on the right, even with the selection highlighting. Perhaps there is not, and it is fertile ground for developing a new visualization.
    • nine_k9 hours ago
      Click any node, and everything not related to that node fades.

      The tangled mess kind of picture is still sometimes useful: you can roughly see bunches grouped, and notice things that are all over the place.

  • btbuildem19 hours ago
    Needs more discovery interactions - first one being node mouseover highlights all associated links.

    It's 2025, I don't want to look at a giant hairball. At top level, give me a summary, reveal detail as I drill down.

    Am I using this as a reference? The search looks promising, I can follow thru and find specifics on a particular item I am after.

    • tank-3418 hours ago
      thanks for suggestion. this project is still in early stage, I've listed some ux related Todos but not yet finished. TBH, i dont expected it to be noticed in hacker's news LOL
  • tank-3418 hours ago
    if you double click route / pydantic class and click 'view in vscode', it will lead you to the file in github

    and in local env, you can 'really' open it in vscode.

  • throwaway0X1321 hours ago
    Mapping software in /src/ modding, either with GIS software for positional API voyaging, which designate the tiers for endpoints.
  • tank-3421 hours ago
    scroll to zoom in/out

    pick tag/routes at left panel, and see subgraphs

    double click to see field table and source code, click link to see source code in github

    click focus to hide other nodes.

    ...