Rails: Copying attributes from an object to another using the “attributes” method

Question

Let model Quote have attributes [price, description]

Let model Invoice have attributes [price, description, priority]

Answer 1

You can select only the attributes that Quote has:

Quote.new(invoice.attributes.select{ |key, _| Quote.attribute_names.include? key })

As noted by @aceofspades (but not with a dynamic solution), you can use ActiveSupport's slice as well:

Quote.new(invoice.attributes.slice(*Quote.attribute_names))