'(ArgumentError) expected to: to be given as argument

Good day. I have weird ArgumentError in my code even tho the code looks very fine. I'm Following the project from Mastering Elixirbook.

defmodule ElixirDrip.Storage.Provider do
  @moduledoc false

  @target Application.get_env(:elixir_drip, :storage_provider)


  defdelegate upload(path, content), to: @target
  defdelegate download(path), to: @target
end

The error

** (ArgumentError) expected to: to be given as argument

elixir

Solution 1:^[1]

In the environment, you compile this code the :storage_provider is not set. You should have been warned about Application.get_env/3 on the module level should not be used (Application.compile_env/3 is to be used instead.)

Make sure you have the storage provider set in the environment you compile the code.

@target Application.compile_env(:elixir_drip, :storage_provider)

if is_nil(@target), do: raise "MUST BE SET: provider"

Solution 2:^[2]

to: is supposed to be a module. I guess you need something like:

defdelegate upload(path, content), to: Application, as: :get_env

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Aleksei Matiushkin
Solution 2	bortzmeyer

'(ArgumentError) expected to: to be given as argument

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]