json - 错误类型“未来”<list<object>>' 不是类型“列表”的子类型<object>' in type cast <div id="body"><p>I'm trying to create a list of objects - from <a href="https://api.spacexdata.com/v2/launches" rel="nofollow noreferrer">SpaceX</a> - where each object is a clickable link tha

问题描述

I'm trying to create a list of objects - from SpaceX - where each object is a clickable link that leads to a details page, but I keep getting this error:

"type 'Future<List>' is not a subtype of type 'List' in type cast"

My Classes:

main.dart: https://pastebin.com/EdxdM7GR
MyApp.dart: https://pastebin.com/bzH0b73C (this is where the error is - I think)
Launch.dart: https://pastebin.com/0aygjZm7 (mostly generated from app.quicktype.io, WARNING: 800+ lines of code, only included for completeness)
Services.dart: https://pastebin.com/B4fKJywk

Error screenshot

More specifically, I believe the error comes from line 22, in MyApp.dart:

futureLaunch = fetchLaunch() as Future<Launch>;

since that's the only place I cast anything as anything... but I have no idea how to fix it. Every time I change it, I only wind up with new errors.

Attempted fixes:

tried to follow this walkthrough, which got me a bunch of new errors - once those were corrected, I was back at the same error.
looked at 3 different stackoverflow questions/answers

none of which managed to help.

watched this video, which is where I found app.quicktype.io, but ultimately didn't help me solve the error.

json - 错误类型“未来”>' 不是类型“列表”的子类型

问题描述

Can you install Rapids 0.16 and TF 2.2 in the same conda environment?

解决方案

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