onGenerateRoute called multiple times

Question

In my main method I have

onGenerateRoute: (route) {
        print(route);
        return Router.generateRoute(route);
      }

If I enter URL with https://myurl.com/#/foo/bar I can see printing is called multiple times.

/foo

/foo/bar

I have an issue because I want to enter bar path, but it gets entered foo instead.

Any ideas how should I proceed?

This question has the same root cause as this question: [Why is initState() called twice?](https://stackoverflow.com/questions/56145378/why-is-initstate-called-twice/69927057#69927057). I provided an [anwer](https://stackoverflow.com/a/69927057/1903781) that is applicable to both — Adrian Moisa, Nov 11 '21 at 11:41

user48956 · Answer 1 · 2020-12-08T17:10:24.933

It gets worse. Set the initalRoute to /home/1/2/3/4/5 and the onGenerateRoute will be called 7 times.

You can make it less terrible with:

MaterialApp app;

app = MaterialApp(
    onGenerateInitialRoutes: (initialRoute)=>[app.onGenerateRoute(RouteSettings(name:initialRoute))],
    initialRoute: initial,
    onGenerateRoute: app.onGenerateRoute);

This avoid you're Route's initState being called multiple times and one onGenerateRoute per '/' in the path. However, is still calls onGenerateRoute twice if you supply a path in the browser bar.

I've submitted a bug report: https://github.com/flutter/flutter/issues/71786

How do you do this with null safety? I'm getting issues on the app.onGenerateRoute line — Coltuxumab, Jan 21 '23 at 13:02

onGenerateRoute called multiple times

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