how can i use golang nested struct i tried everything but i get error?

October 5, 2022

I’ve asked this question before and deleted it. but I don’t understand. I tried everything but still getting error. how can i use this struct. or am i doing it wrong

type Unit struct{
    category struct{
        name string
    }
}

>Solution :

Doing the following:

var unit = Unit{
    category: {
        name: "foo",
    },
}

will not work because the language specification says that you MUST provide the type when initializing a struct literal’s field using a composite literal value for that field.

category‘s type is an anonymous struct, because of that you need to repeat the whole type when trying to initialize it.

type Unit struct{
    category struct{
        name string
    }
}

var unit = Unit{
    category: struct{
        name string
    }{
        name: "foo",
    },
}

Alternative, do not use anonymous structs.

type Category struct {
    name string
}

type Unit struct{
    category Category
}

var unit = Unit{
    category: Category{
        name: "foo",
    },
}

And if you want to use this struct outside of the package in which it is declared you MUST export its fields

type Category struct {
    Name string
}

type Unit struct{
    Category Category
}

// ...

var unit = mypkg.Unit{
    Category: mypkg.Category{
        Name: "foo",
    },
}