Correct struct definition

Question

How to define the struct in the correct way, look at the following code snippet:

defmodule SapOdataService.Worker do
  defstruct uri: "", user: nil, password: nil

Should I define the default value as nil or?

Answer 1

You have a few options.

1. You can list the key value pairs explicitly using nil for blank values

   defmodule User do
     defstruct name: "zero_coding", age: nil
   end
   

2. You can pass a list of atoms that will all default to nil:

   defmodule User do
     defstruct [:name, :age]
   end
   

3. You can do a mix of the above a list of atoms that will all default to nil:

   defmodule User do
     defstruct [:age, name: "zero_coding"] 
   end
   

4. You can also enforce specific keys that must be specified when creating the struct

   defmodule User do
     @enforce_keys [:name]
     defstruct [:name, :age]
   end