Very new to this, so please stick with me.  I have 2 models:

User:
id, first_name, last_name, created_at

define_index do
    indexes user.first_name, user.last_name
end

Post:
id, user_id, title, post, created_at

define_index do
    indexes title, post

    has user(:id), :as => :author

    set_property :enable_star => 1
    set_property :min_prefix_len => 3
  end

I'm trying to search all Posts with "page" in the title, that have
been authored by a certain user.  I can get it to work by passing in
the ID of a user with conditions on the search.  But how can I do it
by passing in a string of the first_name of the user?  Is it possible?

Thanks in advance.


following is the actual search, that uses the user_id:

@per_page = 20

      conditions = Hash.new

      if params[:start_date] != nil && params[:end_date] != nil
        start_date = Time.parse(params[:start_date])
        end_date = Time.parse(params[:end_date])
        conditions.merge!({ :created_at => start_date..end_date })
      end

      authors = Array.new
      authors.push(16)

      conditions.merge!({:author => authors})

      @classes.push(User)
      @classes.push(Post)

  if @classes.count > 0
        @results = ThinkingSphinx::Search.search '*' + params[:query]
+ '*', :with => conditions, :classes => @classes, :index_weights =>
{ School => 10, User => 10, UserWallpost => 70, GroupDiscussion => 90,
GroupDiscussionComment => 80, Item => 100 }, :retry_stale =>
true, :per_page => @per_page, :page => params[:page]
  end

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