Go: Working with JSON

Go: Working with JSON

I thought I knew how to handle JSON in Go.. that is until I was traveling and didn’t have the internet.
So below are my notes on handling go, and hopefully it will stick in my long term memory a little better!

So what are the main things you need to know for handling JSON in Go? Well they would be:

• Turning data into JSON
• Taking JSON and extracting it into usable data.

TL;DR:

• it was really about creating a struct…

Turning Data into JSON

The standard tutorials use a User. Easy enough to understand.

We create a struct that will be used as the “JSON structure”

type User struct {
	Name  string `json:"name"` 
	Email string `json:"email"` 

}

Then lets pretend we have some User data

name := "George"
email := "fake@gmail.com"

so now lets first instantiate a struct of User, using the dot notation:

var person User
person.Name = name
person.Email = Email

This creates a struct that looks like:

User{
    Name: "Alice", 
    Email: "alice@example.com"
}

Then we need to Marshal (convert to JSON bytes) the person struct!

data, err := json.Marshal(person)
	if err != nil {
		fmt.Println("Error:", err)
		return
	}

Which converts our data into JSON. Resulting in:

{"name":"George","email":"fake@gmail.com"}

To see the code all together. It is setup in the Go Playground here

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