LearningElixir.tv - Ecto Part 2

excercise.ex

def reload(item) do
  %struct{} = item
  pk = struct.__schema__(:primary_key) |> List.first
  %{^pk => id} = item
  get(struct, id)
end

def max(queryable, fieldName) do
  query = from x in queryable,
          select: max(field(x, ^fieldName))

  all(query)
end

def reload(schema) do
  Repo.get(schema.__struct__, schema.id)
end