1 files changed, 11 insertions, 0 deletions
diff --git a/app/models/nutrient_profile.rb b/app/models/nutrient_profile.rb
index 22f2704..0610855 100644
--- a/app/models/nutrient_profile.rb
+++ b/app/models/nutrient_profile.rb
@@ -1,2 +1,13 @@
 class NutrientProfile < ApplicationRecord
+  # Align these keys with your schema columns (per your schema.txt)
+  NUTRIENT_KEYS = %i[
+    nno3 p k ca mg s na cl si fe zn b mn cu mo nnh4
+  ].freeze
+
+  # Returns a Hash of nutrient => numeric requirement (nil kept; caller can skip nils)
+  def requirements_hash
+    attributes
+      .slice(*NUTRIENT_KEYS.map(&:to_s)) # only nutrient columns
+      .transform_keys(&:to_s)
+  end
 end