Question

I’m trying to make a collection of items for options_for_select using map inside my model:

  def get_products
    Product.all.map { |product| [product.description,product.id] }
  end

However rails is giving the error:

undefined method `map’ for :get_products:Symbol

Is not possible to use map inside models?

The code in the view is:

<%= f.select_tag :product_id, options_for_select(:get_products) %>

Update

Changing the code in the view to get_products instead of :get_products gives the error:

undefined local variable or method `get_products’ for #<#:0xb189c770>

Answer 1

options_for_select expects a collection to be passed in and not a symbol. I’m fairly certain your error is coming from inside the Rails code and not your model.

Change #get_products to be a class method:

def self.get_products
  Product.all.map { |product| [product.description,product.id] }
end

And then in the view (assuming #get_products lives within a model called Product):

<%= f.select :product_id, options_for_select(Product.get_products) %>