jsonelixirelixir-iexelixir-poison

running elixir poison commands in iex

I am a greenhorn in elixir and want to test the Poison functions from iex

https://hexdocs.pm/poison/1.3.1/#functions_details

iex> Poison.decode("[1,2,3]")

When I run this command I am getting the error below.

iex(1)> Poison.decode("[1,2,3]")
** (UndefinedFunctionError) function Poison.decode/1 is undefined (module Poison is not available)
    Poison.decode("[1,2,3]")

What am I doing wrong here?

Solution

  • If you have a mix project (created by mix new project_name or mix phx.new project_name), run iex -S mix to load dependencies into your iex console. Make sure you are in the projects directory. If you don't have such project, create it.

    Make sure the required packages are listed in mix.exs:

    defp deps do
  [
     {:poison, "~> 4.0"}
  ]
end