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Commit 6eb519b7029aa371d24ac7984fc09e4ae482c82c

Authored by Pius Uzamere
1 parent d66be11a
Exists in master and in 1 other branch production-vendorized

refactored prompt picking

Showing 3 changed files with 21 additions and 5 deletions   Show diff stats
app/models/choice.rb
  Diff comments   View file @6eb519b
... ... @@ -38,7 +38,7 @@ class Choice < ActiveRecord::Base
38 38 votes_count || 0
39 39 end
40 40  
41   - after_create :generate_prompts
  41 + #after_create :generate_prompts
42 42 def before_create
43 43 unless item
44 44 @item = Item.create!(:creator => creator, :data => data)
... ...
app/models/item.rb
  Diff comments   View file @6eb519b
... ... @@ -14,4 +14,10 @@ class Item < ActiveRecord::Base
14 14  
15 15 validates_presence_of :creator_id
16 16 validates_presence_of :data, :on => :create, :message => "can't be blank"
  17 +
  18 + def self.mass_insert!(creator_id, data_array)
  19 + #alpha
  20 + inserts = data_array.collect{|i| "(#{connection.quote i}, #{connection.quote creator_id})"}.join(", ")
  21 + connection.insert("INSERT INTO items(data, creator_id) VALUES (#{inserts})")
  22 + end
17 23 end
... ...
app/models/question.rb
  Diff comments   View file @6eb519b
1 1 class Question < ActiveRecord::Base
  2 + require 'set'
2 3 belongs_to :creator, :class_name => "Visitor", :foreign_key => "creator_id"
3 4 belongs_to :site, :class_name => "User", :foreign_key => "site_id"
4 5  
... ... @@ -21,11 +22,20 @@ class Question &lt; ActiveRecord::Base
21 22 choices_count
22 23 end
23 24  
24   - def picked_prompt
  25 + #TODO: generalize for prompts of rank > 2
  26 + #TODO: add index for rapid finding
  27 + def picked_prompt(rank = 2)
  28 + raise NotImplementedError.new("Sorry, we currently only support pairwise prompts. Rank of the prompt must be 2.") unless rank == 2
  29 + choice_id_array = distinct_array_of_choice_ids(rank)
  30 + @p = prompts.find_or_create_by_left_choice_id_and_right_choice_id(choice_id_array[0], choice_id_array[1])
  31 + end
  32 +
  33 + def distinct_array_of_choice_ids(rank = 2, only_active = true)
25 34 begin
26   - @p = prompts.first(:order => 'RANDOM()', :include => [{ :left_choice => :item }, { :right_choice => :item }])
27   - end until @p.active?
28   - return @p
  35 + @the_choice_ids = Set.new
  36 + rank.times { @the_choice_ids << choices.active.first(:order => 'RANDOM()', :select => 'id').id }
  37 + end until @the_choice_ids.size == rank
  38 + @the_choice_ids.to_a
29 39 end
30 40  
31 41 def picked_prompt_id
... ...