Is there a way to set ***col*** as dynamic or convert it in some way to a valid attribute?
It is currently throwing the error: undefined method `col=' for #...

```
def copy_stock_data_from_sandbox(cntrlr)
  source_table = cntrlr.singularize.classify.constantize
  dest_table = source_table.new
  source_table.column_names.each do |col|
    dest_table.col = xyz    # <------ This is the line in question
  end
  dest_table.save
end

```

Also, not sure if the title is accurate, please suggest if 'dynamic attribute' is the wrong term for this situation. Thanks