find_by...

rubyonrails-talk
1

Hello, I am trying to construct a lookup based on params submited. possible urls.. /gadgets?product_id=1 /gadgets?product_id=1&product_group_id=2 /gadgets?product_location_id=5 /gadgets?product_id=1&product_location=5 ...

How do I write a universal lookup method ?

Gadget.find_by_product_id Gadget.find_by_product_id_and_product_group_id Gadget.find_by_product_location_id Gadget.find_by_product_id&product_location_id

I want find_by... to include only submitted params from a set of possible options.

Essentially I want find a way to avoid writing many if and else and wonder if anyone knows an easier and better approach.

2

Hello, I am trying to construct a lookup based on params submited. possible urls.. /gadgets?product_id=1 /gadgets?product_id=1&product_group_id=2 /gadgets?product_location_id=5 /gadgets?product_id=1&product_location=5 ...

How do I write a universal lookup method ?

You may find that the hash form of :conditions is the easiest way to do this.

Fred

3

you can use to_param in the model witch is a screencast in www.railscasts.com