tarantool / go-tarantool / 5935638064

79%

master: 74%

Pull #331

github

crud: support `operation_data` field in errors

This patch adds `operation_data` decoding for the `crud.Error`.

The `operation_data` type is determined as `rowType` in `crud.Result`.

Also, according to [1], an error can contain one of the following:
- an error
- an array of errors
- nil

So the error decoding logic has been modified to consider each case,
in order to avoid comparing an error to nil.

1. https://github.com/tarantool/crud/tree/master#api

Closes #330

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