Created a module for custom Ecto changeset validator functions

lib/sukaato/custom_validators.ex

@@ -0,0 +1,15 @@
+defmodule Sukaato.CustomValidators do
+  import Ecto.Changeset
+  import Validate, only: [validate: 2]
+
+  def validate_map_format(changeset, field, conventional_mapping) when is_atom(field) do
+    field_value = get_field(changeset, field)
+    validation_result = validate(field_value, conventional_mapping)
+
+    if elem(validation_result, 0) == :ok do
+      changeset
+    else
+      add_error(changeset, field, "is not a valid map")
+    end
+  end
+end