This module generates a :select field with options downloaded from Repo.

Example of use for Article with one Category:

schema "articles" do
  belongs_to :category, App.Category
end

form
|> add(Formex.CustomField.SelectAssoc, :category_id, label: "Category")

Formex will find out that :category_id refers to App.Category schema and download all rows from Repo ordered by name.

Options

• choice_name - controls the content of <option>. May be the name of field or function. Example of use:

  form
  |> add(SelectAssoc, :article_id, label: "Article", choice_name: :title)

  form
  |> add(SelectAssoc, :article_id, label: "Article", choice_name: fn article ->
    article.title
  end)