Enumerable Not Implemented Error

enum error

protocol Enumerable not implemented for %Dashex.Project{__meta__: %Ecto.Schema.Metadata{source: "projects", state: :loaded}, badges: [%Dashex.Badge{__meta__: %Ecto.Schema.Metadata{source: "badges", state: :loaded}, id: 5, image_url: "https://img.shields.io/travis/bitpay/ruby-client.svg?style=flat-square", inserted_at: %Ecto.DateTime{day: 12, hour: 21, min: 57, month: 6, sec: 41, usec: 0, year: 2015}, name: "Travis", project: #Ecto.Association.NotLoaded, project_id: 6, updated_at: %Ecto.DateTime{day: 12, hour: 21, min: 57, month: 6, sec: 41, usec: 0, year: 2015}}, %Dashex.Badge{__meta__: %Ecto.Schema.Metadata{source: "badges", state: :loaded}, id: 8, image_url: "https://img.shields.io/codeclimate/github/bitpay/ruby-client.svg?style=flat-square", inserted_at: %Ecto.DateTime{day: 12, hour: 22, min: 0, month: 6, sec: 55, usec: 0, year: 2015}, name: "Code Climate", project: #Ecto.Association.NotLoaded, project_id: 6, updated_at: %Ecto.DateTime{day: 12, hour: 22, min: 0, month: 6, sec: 55, usec: 0, year: 2015}}], homepage: "https://github.com/bitpay/ruby-client", id: 6, inserted_at: %Ecto.DateTime{day: 12, hour: 21, min: 56, month: 6, sec: 41, usec: 0, year: 2015}, name: "ruby-client", updated_at: %Ecto.DateTime{day: 12, hour: 21, min: 56, month: 6, sec: 41, usec: 0, year: 2015}}

offending line

<%= link "Back", to: project_path(@conn, :index, @project) %>

stack trace

[error] #PID<0.329.0> running Dashex.Endpoint terminated
Server: localhost:4000 (http)
Request: GET /projects/6/badges/8/edit
** (exit) an exception was raised:
    ** (Protocol.UndefinedError) protocol Enumerable not implemented for %Dashex.Project{__meta__: %Ecto.Schema.Metadata{source: "projects", state: :loaded}, badges: [%Dashex.Badge{__meta__: %Ecto.Schema.Metadata{source: "badges", state: :loaded}, id: 5, image_url: "https://img.shields.io/travis/bitpay/ruby-client.svg?style=flat-square", inserted_at: %Ecto.DateTime{day: 12, hour: 21, min: 57, month: 6, sec: 41, usec: 0, year: 2015}, name: "Travis", project: #Ecto.Association.NotLoaded<association :project is not loaded>, project_id: 6, updated_at: %Ecto.DateTime{day: 12, hour: 21, min: 57, month: 6, sec: 41, usec: 0, year: 2015}}, %Dashex.Badge{__meta__: %Ecto.Schema.Metadata{source: "badges", state: :loaded}, id: 8, image_url: "https://img.shields.io/codeclimate/github/bitpay/ruby-client.svg?style=flat-square", inserted_at: %Ecto.DateTime{day: 12, hour: 22, min: 0, month: 6, sec: 55, usec: 0, year: 2015}, name: "Code Climate", project: #Ecto.Association.NotLoaded<association :project is not loaded>, project_id: 6, updated_at: %Ecto.DateTime{day: 12, hour: 22, min: 0, month: 6, sec: 55, usec: 0, year: 2015}}], homepage: "https://github.com/bitpay/ruby-client", id: 6, inserted_at: %Ecto.DateTime{day: 12, hour: 21, min: 56, month: 6, sec: 41, usec: 0, year: 2015}, name: "ruby-client", updated_at: %Ecto.DateTime{day: 12, hour: 21, min: 56, month: 6, sec: 41, usec: 0, year: 2015}}
        (elixir) lib/enum.ex:1: Enumerable.impl_for!/1
        (elixir) lib/enum.ex:112: Enumerable.reduce/3
        (elixir) lib/enum.ex:1265: Enum.reduce/3
        (dashex) Dashex.Router.Helpers.segments/3
        (dashex) web/router.ex:1: Dashex.Router.Helpers.project_path/3
        (dashex) web/templates/badge/edit.html.eex:6: Dashex.BadgeView."edit.html"/1
        (phoenix) lib/phoenix/view.ex:197: Phoenix.View.render_within/3
        (phoenix) lib/phoenix/view.ex:429: Phoenix.View.render_to_iodata/3