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Crear lista de productos

si usted desea solo mostrar los productos con stock positivo usar el metodo visible_on_catalog?, que esta ubicado en product.rb el metodo funciona de la siguiente manera

def visible_on_catalog? <- nombre del metodo

  self.variants.each do |variants| <- esta linea buscara en la columna stock los productos 
    if variant.stock >0            <- esta linea toma los productos con stock mayor a 0
      return true                  <- si el producto encontrado tiene stock lo mostrara
    else
      false                        <- de lo contrario no lo mostrara
    end
  end   
end

para usar correctamente este metodo reemplazar un parte del codigo en el archivo products_controller.rb en la linea 7

def index
  @products = Product.all <- muestra todos los productos no discrimina el stock
end                          para usar el metodo solo cambiar .all por el nombre del
                             metodo quedando de la siguiente forma

def index
  @products = Product.visible_on_catalog?
end

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