Started Ingredient#create

app/controllers/ingredients_controller.rb

@@ -9,8 +9,35 @@ class IngredientsController < ApplicationController
   end
 
   def create
+    @ingredient = Ingredient.new(ingredient_params.update(project: @project))
+    if @ingredient.save
+      flash[:notice] = 'Created new ingredient'
+      redirect_to project_ingredients_url(@project)
+    else
+      @ingredients = @project.ingredients
+      render :index
+    end
   end
 
   def destroy
   end
+
+  private
+
+  def ingredient_params
+    params.require(:ingredient).permit(
+      :name,
+      :ref_amount,
+      :ref_unit_id,
+      :group,
+      nutrients_attributes:
+      [
+        :id,
+        :quantity_id,
+        :amount,
+        :unit_id,
+        :_destroy
+      ]
+    )
+  end
 end