Ecto custom type UUID

Questions / Help
1

I have this code that works

embedded_schema do
    field(:id, Ecto.UUID)
end

I am wondering how come this does not work and gives an error invalid or unknown type :uuid for field :id

embedded_schema do
    field(:id, :uuid)
end

Other kinds of field i can do something like field(:name, :string). I was expecting the same here

2

You can use this:

field :id, :binary_id
3

Thanks for sharing. Now my doubt is what is the type of the second parameter of field macro? Seems like it can accept atoms as well as modules

4

It accepts ecto types. The atoms are identifiers for primitive types (listed in Ecto.Schema docs), while modules are for custom Ecto.Type implementations.