WIP: validate required fields

lib/membership/validate_property.ex

@@ -0,0 +1,27 @@
+defmodule Mv.Membership.Validations.ValidateProperty do
+  use Ash.Resource.Validation
+
+  @impl true
+  def init(opts) do
+    if is_atom(opts[:value]) do
+      {:ok, opts}
+    else
+      {:error, "attribute must be an atom!"}
+    end
+  end
+
+  @impl true
+  def validate(changeset, _opts, _context) do
+    changeset = Ash.Changeset.load(changeset, [:property_type])
+    property_type = changeset.data.property_type
+    IO.inspect(property_type)
+    required?   = property_type.required
+    union_value = Ash.Changeset.get_attribute(changeset, :value)
+
+    if required? and union_value in [nil, ""] do
+      {:error, field: :value, message: "is required"}
+    else
+      :ok
+    end
+  end
+end