Sometimes we need to write business logic inside classes that have multiple dependencies.
To do this, we can pass the dependencies as constructor arguments.
A much simpler solution is to pass ref.read as an argument.
Here's a thread with all the details. 🧵
Reader is just a function we can use to read a provider's value, just once.
And once we get the underlying value (a repository in this case), we can call methods on it.
Note: when we want to access a provider inside a widget callback, we do exactly the same thing.
An alternative way of doing this is to pass ref directly.
As a result, we have to call ref.read(provider).someMethod() inside our class methods.
Though if you only ever need to read (and not watch or listen), using Reader makes your intention more explicit.
But how to you write unit tests for classes using Reader (or Ref)?
Glad you asked!
I'll be covering that in a separate thread (and article) soon. 👍
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