import "github.com/relvacode/go-namespace"

Go namespace provides the ability to get a Go value by a string name. Similar to text/template's value access without templating.

// l is your value that you want to search its namespace for
// It can be either a struct or map, or an interface to a struct or map.
l := map[string]interface{}{
  "PrimaryKey": map[string]interface{}{
    "SecondaryKey": "MyValue",
  },
}

// Get a value using ordered names.
v, err = namespace.NameSpace(l, []string{"PrimaryKey", "SecondaryKey"})

if err != nil {
  // Do something with the error here
}

fmt.Println(v.String()) // Outputs: MyValue

Struct Tags

Using the ns struct tag you can change how namespace will access that struct field.

type MyStruct struct {
        // Ignore this field as a namespace
        Passthough OtherStruct `ns:'-"`
        
        // Rename the namespace name to 'new'
        Rename OtherStruct `ns:"new"`
}

namespace.Value

namespace.Value is a wrapper around reflect.Value that provides safe methods for converting objects into a requested native type.

v := namespace.ValueOf(1234.567)
i, err := v.Int()