Elixir Does Pheonix Ecto Compilation Fix

compile ecto

10.29.14

I was following this tutorial: http://www.elixirdose.com/post/lets-build-web-app-with-phoenix-and-ecto

Could not mix compile

	==> postgrex
	warning: the dependency postgrex requires Elixir "0.15.0" but you are running on v1.0.1
	Compiled lib/postgrex/binary_utils.ex
	Compiled lib/postgrex/error.ex
	Compiled lib/postgrex/structs.ex
	lib/postgrex/types.ex:5: warning: unused import Postgrex.BinaryUtils
	
	== Compilation error on file lib/postgrex/types.ex ==
	** (CompileError) lib/postgrex/types.ex:97: cannot invoke local nil?/1 inside guard
	    (stdlib) lists.erl:1352: :lists.mapfoldl/3
	    (elixir) src/elixir_clauses.erl:53: :elixir_clauses.translate_guard/4
	    (elixir) src/elixir_clauses.erl:49: :elixir_clauses."-guards/4-lc$^0/1-0-"/4
	    (elixir) src/elixir_clauses.erl:39: :elixir_clauses.clause/7
	    (elixir) src/elixir_clauses.erl:82: anonymous fn/5 in :elixir_clauses.do_clauses/4
	
	could not compile dependency postgrex, mix compile failed. You can recompile this dependency with `mix deps.compile 		postgrex` or update it with `mix deps.update postgrex`


The suggestions failed. I consulted with #elixir-lang on IRC, this is what worked for me:

Use these dependencies instead of the ones specified in the tutorial (in mix.exs):

     {:postgrex, ">= 0.0.0"},
     {:ecto, "~> 0.2.0"}
     
then . . . 

$ mix deps.unlock --all
$ mix deps.clean --all
$ mix deps.get
$ mix compile 

That fixed it for me.