Machine Learning in Elixir

Seeding Your Databases

With your model up and running, it’s time to seed your database with the library’s books. Before that happens, you need to make some slight modifications to the generated book resource code.

First, modify BookSearch.Book.changeset/2 to match the following:

@doc false
def changeset(book, attrs) do
  book
  |> cast(attrs, [:author, :title, :description, :embedding])
  |> validate_required([:author, :title, :description])
end

Notice that you removed :embedding as a required argument in attrs. Because you compute the embedding from book attributes, you don’t want to have to pass it up front.

Next, add the following put_embedding/1 function to BookSearch.Book:

@doc false
def put_embedding(%{changes: ...