Question

I have 5 select’s in my html code. I send them to controller, but for example some of them could be empty (default value is 0), so for example in some case i need to search only via params[:size] is some case only via params[:capacity] and in other params[:size] and params[:capacity] both as well… But how do to this? how to operate with find etc?
now i have something like this:

size = "*"+params[:akbsize]+"*"
    @accums = Accumulator.find(:all, :conditions => ["MATCH(description) AGAINST (? in boolean mode)", size])
    cap = "*"+params[:akbcapacity]+"*"
    @accums2 = Accumulator.find(:all, :conditions => ["MATCH(description) AGAINST (? in boolean mode)", cap])

But how to do as i described? Is it good to do here with metasearch gem?

Answer 1

You could make method for it like so:

class Accumulator
  def self.by_size(size)
    if size
      where("description LIKE ?", "%#{size}%")
    else
      scoped
    end
  end

  def self.by_capacity(capacity)
    if capacity
      where("description LIKE ?", "%#{capacity}%")
    else
      scoped
    end
  end
end

Then on your controller:

@accums = Accumulator.by_size(params[:size]).by_capacity(params[:capacity])

This would accomplish what u want. I think that the method all wouldn’t be necessary at all.

=)