rubyonrailsin

On Mar 29, 7:51 pm, RVRoadie <rvroa...@gmail.com> wrote:
> I created an index with person_id and club_id but I can't figure out
> how to properly access it (doesn't show up in the find_by... lists)
>
> Can someone provide me a sample find statement to best use this index

You don't need to do anything explicitly - just find :all, :conditions
=> ... will use the index if needed (you may have been looking for
find_by_xxx_and_yyy though)
The index on person_id is usually superfluous - when you have a
multicolumn index then any left prefix of that index is also an index
ie the index on [:person_id, :club_id] can be used as an index on just
person_id

Fred

>
> Thanks.
>
> class CreateMembers < ActiveRecord::Migration
>   def self.up
>     create_table :members do |t|
>       t.integer :club_id
>       t.integer :person_id
>       t.text :comment
>       t.string :status
>       t.string :member_type
>       t.integer :registrations_count
>
>       t.timestamps
>     end
>
>     add_index :members, :club_id
>     add_index :members, :person_id
>     add_index :members, [:person_id, :club_id]
>   end
>
>   def self.down
>     drop_table :members
>   end
> end

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