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elixirphoenix-frameworkectoelixir-mix

Why is phoenix_ecto failing to compile on the :model in the changeset?


When I try to run mix deps.get or mix deps.compile I get this error:

== Compilation error on file lib/phoenix_ecto/html.ex ==
** (CompileError) lib/phoenix_ecto/html.ex:3: unknown key :model for struct Ecto.Changeset
    (stdlib) lists.erl:1354: :lists.mapfoldl/3

Why is this happening and how can I fix it?


Solution

  • How to fix this:

    You need to upgrade your dependencies like so:

    {:ecto, "~> 2.0.4"},
    {:phoenix_ecto, "~> 3.0.1"},
    {:phoenix_html, "~> 2.6.2"},
    

    Then run mix clean --all and then mix deps.get.

    Why this is happening:

    This error comes from your phoenix_ecto dependency being behind your ecto dependency. In ecto v2.0.0, changeset.model became changeset.data.

    The code for phoenix_ecto is still using model on line three:

    def to_form(%Ecto.Changeset{model: model, params: params} = changeset, opts) do
    

    In this commit, phoenix_ecto was upgraded to support the new version of ecto.