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The author conveniently leaves out the implementation of the actual method calls themselves, which is frankly the important part. interface Query { All

The author conveniently leaves out the implementation of the actual method calls themselves, which is frankly the important part. interface Query { All ... Insert ... Update ... Delete ... WhateverElse ... } Now admittedly, the implementation is probably cleaner with "generics", but you can generically approach the problem with interfaces.

cpuguy83 5y ago
But how do you get the thing that implements that interface? Either the framework has to know how to create a querier for each specific type, drop to using empty interfaces, or use generics.
- flippinburgers 5y ago
  The point of the interface is that the person authoring the code defines the internals.