Ecto make not null column nullable

Making a column nullable when it was not null is not obvious with Ecto however it’s pretty simple. Let’s say your first migration was the following : defmodule Foo.Repo.Migrations.CreateEvents do use Ecto.Migration def change do create table(:events) do add(:title, :string, null: false) # Title column cannot be null end end end At some point you want the title to be nullable then you should use the ecto’s modify/3 function. defmodule Foo.