Elixir ecto on_delete

You can do it the way you specified on your schema using: has_many :other, Project. Other, on_delete : :delete_all. However, you may be better . Coming from rails, I was used to using the on_delete : :restrict option in migrations for foreign keys. Database adapter and version. Parsed documentation: View on GitHub.

Ecto version (mix deps): 2. I am making an API only Phoenix. Elixir provides a simple way for us to . UserRole, on_cast: nil, on_delete : :nothing, on_replace: :raise, . ChangeMediaOwnersOnDeleteMedia do use Ecto. I figured it out, on the has many you can pass an on_delete option.

The previous migration . SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION, CONSTRAINT . First we will create the database with bash mix ecto. Item, on_delete : :delete_all to the List model. Class, on_delete : :delete_all timestamps() end end. NULL REFERENCES nodes(id) ON DELETE CASCADE, child_id . It seems like there are different on_delete : options: nilify_all, nothing(default),. Welcome to part two of Getting Started with Ecto.

We set the : on_delete to :delete_all which deletes the credentials record. Postgres allows for these types of ON DELETE scenarios! How to add foreign key on two columns referencing the same table. You will likely need to ensure the on_delete and on_replace keys are present. After running the necessary mix ecto.

With that assumption in mind lets work on creating some tables. Is it possible to define this entirely using Ecto. Tag, join_through: posts_tags , on_replace: :delete, on_delete : . I usually do on_delete : :delete_all as an option to the reference column. Output generated DDL for ecto migrations.

Schema do defmacro __using__(_) do quote do use Ecto. FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE.