Question

Any ideas what it takes to get this to work? I can’t for the life of me figure it out.

def get_prices(c)
  @print_prices = {}
  Billing.where(:name => c).column_names.each do |d|
    if d.match(/^print_/)
      @print_prices[d] = d.value
    end
  end
  return @print_prices
end

I’ve got no idea what to substitute d.value for.

Cheers for any help.

Answer 1

The following code will perform the query, returned in the form of a relation, and reject all items in the attribute key-value hash which do not match the given regex, which, in this case, is /^print_/.

def get_prices(c)
  Billing.where(:name => c).first.attributes.reject{ |i| !i.match(/^print_/) }
end

Alternatively, it can also be written as:

def get_prices(c)
  Billing.where(:name => c).first.attributes.select{ |i| i.match(/^print_/) }
end