Handle Pgvector itself in new/1

lib/pgvector.ex

@@ -6,8 +6,12 @@ defmodule Pgvector do
   defstruct [:data]
 
   @doc """
-  Creates a new vector from a list or tensor
+  Creates a new vector from a Pgvector or list or tensor
   """
+  def new(%Pgvector{} = pgvector) do
+    pgvector
+  end
+
   def new(list) when is_list(list) do
     dim = list |> length()
     bin = for v <- list, into: "", do: <<v::float-32>>

test/pgvector_test.exs

@@ -1,6 +1,11 @@
 defmodule PgvectorTest do
   use ExUnit.Case
 
+  test "pgvector" do
+    pgvector = Pgvector.new([1, 2, 3])
+    assert pgvector == pgvector |> Pgvector.new()
+  end
+
   test "list" do
     list = [1.0, 2.0, 3.0]
     assert list == list |> Pgvector.new() |> Pgvector.to_list()