Turn maps (and keyword lists) into structs
One nice way of turning a map or keyword list into an existing struct is to use
struct/2 or struct!/2.
attrs = %{name: "Frodo", age: 35, email: "frodo@hobbiton.com"}
struct(User, attrs)
#=> %User{name: "Frodo", age: 35, email: "frodo@hobbiton.com"}
What about attributes that aren’t defined in the struct?
struct/2will drop them 👋struct!/2will raise an error 💥
But there’s more!
Not only can they create structs, they can also update them:
attrs = %{name: "Frodo", age: 35, email: "frodo@hobbiton.com"}
user = struct!(User, attrs)
#=> %User{name: "Frodo", age: 35, email: "frodo@hobbiton.com"}
struct!(user, age: 36)
#=> %User{name: "Frodo", age: 36, email: "frodo@hobbiton.com"}