Why your Flutter JSON model crashes at runtime (and how to generate one that doesn't)
by Chanpenh Yorn dev.to
3 min read
You write a model, the first API response parses fine, and a week later a crash report says: type 'int' is not a subtype of type 'double' in type cast Nothing in your code changed. The data did. Here are the three type errors I see most often with jsonDecode, why they happen, and how to write (or generate) models that survive real responses. 1. int vs double Dart's jsonDecode reads the number typ…
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