How to Handle Type Assertion After Unmarshaling JSON into an `interface{}` in Go?

Unmarshaling into an Interface{} and Performing Type Assertion

When receiving messages through a RabbitMQ system and performing type assertion, it's important to understand the types that are unmarshaled by the json package.

Default Unmarshaling Types

By default, json.Unmarshal returns values of the following types:

• bool
• float64
• string
• []interface{}
• map[string]interface{}
• nil

Unmarshaling into an Interface{}

When unmarshaling into an interface{}, the returned value will be a generic map[string]interface{}. To determine the actual type within the map, you can either:

• Unpack the data manually from the map.
• Unmarshal directly into the desired struct type.

Example Using a Wrapper Struct

To avoid manually unpacking data, consider using a wrapper struct like the following:

This wrapper struct allows you to unmarshal data into either Something1 or Something2, depending on the type of data received.

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