fixes #775

app/models/tag.rb

@@ -144,7 +144,7 @@ class Tag < ActiveRecord::Base
 
   module ParseMethods
     def normalize(query)
-      query.to_s.downcase.strip
+      query.to_s.strip
     end
     
     def scan_query(query)
@@ -219,18 +219,18 @@ class Tag < ActiveRecord::Base
     
     def parse_tag(tag, output)
       if tag[0] == "-" && tag.size > 1
-        output[:exclude] << tag[1..-1]
+        output[:exclude] << tag[1..-1].downcase
         
       elsif tag[0] == "~" && tag.size > 1
-        output[:include] << tag[1..-1]
+        output[:include] << tag[1..-1].downcase
         
       elsif tag =~ /\*/
-        matches = Tag.name_matches(tag).all(:select => "name", :limit => Danbooru.config.tag_query_limit, :order => "post_count DESC").map(&:name)
+        matches = Tag.name_matches(tag.downcase).all(:select => "name", :limit => Danbooru.config.tag_query_limit, :order => "post_count DESC").map(&:name)
         matches = ["~no_matches~"] if matches.empty?
         output[:include] += matches
         
       else
-        output[:related] << tag
+        output[:related] << tag.downcase
       end
     end
 
@@ -283,7 +283,7 @@ class Tag < ActiveRecord::Base
             q[:subscriptions] << $2
 
           when "md5"
-            q[:md5] = $2.split(/,/)
+            q[:md5] = $2.downcase.split(/,/)
 
           when "-rating"
             q[:rating_negated] = $2
@@ -334,10 +334,10 @@ class Tag < ActiveRecord::Base
             q[:parent_id] = $2.to_i
             
           when "order"
-            q[:order] = $2
+            q[:order] = $2.downcase
 
           when "status"
-            q[:status] = $2
+            q[:status] = $2.downcase
             
           when "pixiv"
             q[:pixiv] = parse_helper($2)

app/models/tag_subscription.rb

@@ -111,7 +111,7 @@ class TagSubscription < ActiveRecord::Base
     relation = where("creator_id = ?", user_id)
     
     if name
-      relation = relation.where("name ILIKE ? ESCAPE E'\\\\'", name.to_escaped_for_sql_like)
+      relation = relation.where("lower(name) LIKE ? ESCAPE E'\\\\'", name.downcase.to_escaped_for_sql_like)
     end
     
     relation.each do |tag_sub|

db/migrate/20130308204213_add_lower_name_index_to_pools.rb

@@ -0,0 +1,9 @@
+class AddLowerNameIndexToPools < ActiveRecord::Migration
+  def self.up
+    execute "create index index_pools_on_lower_name on pools (lower(name))"
+  end
+
+  def self.down
+    execute "drop index index_pools_on_lower_name"
+  end
+end

db/structure.sql

@@ -5679,6 +5679,13 @@ CREATE INDEX index_pool_versions_on_updater_ip_addr ON pool_versions USING btree
 CREATE INDEX index_pools_on_creator_id ON pools USING btree (creator_id);
 
 
+--
+-- Name: index_pools_on_lower_name; Type: INDEX; Schema: public; Owner: -; Tablespace: 
+--
+
+CREATE INDEX index_pools_on_lower_name ON pools USING btree (lower((name)::text));
+
+
 --
 -- Name: index_pools_on_name; Type: INDEX; Schema: public; Owner: -; Tablespace: 
 --
@@ -6232,3 +6239,5 @@ INSERT INTO schema_migrations (version) VALUES ('20130302214500');
 INSERT INTO schema_migrations (version) VALUES ('20130305005138');
 
 INSERT INTO schema_migrations (version) VALUES ('20130307225324');
+
+INSERT INTO schema_migrations (version) VALUES ('20130308204213');

test/unit/post_test.rb

@@ -909,6 +909,13 @@ class PostTest < ActiveSupport::TestCase
       assert_equal(post2.id, relation.first.id)
     end
     
+    should "return posts for a case sensitive source search" do
+      post1 = FactoryGirl.create(:post, :source => "ABCD")
+      post2 = FactoryGirl.create(:post, :source => "1234")
+      relation = Post.tag_match("source:ABCD")
+      assert_equal(1, relation.count)
+    end
+    
     should "return posts for a pixiv source search" do
       post = FactoryGirl.create(:post, :source => "http://i1.pixiv.net/img123/img/artist-name/789.png")
       assert_equal(1, Post.tag_match("source:pixiv/artist-name/*").count)

test/unit/tag_test.rb

@@ -101,12 +101,12 @@ class TagTest < ActiveSupport::TestCase
   context "A tag parser" do
     should "scan a query" do
       assert_equal(%w(aaa bbb), Tag.scan_query("aaa bbb"))
-      assert_equal(%w(~aaa -bbb*), Tag.scan_query("~AAa -BBB* -bbb*"))
+      assert_equal(%w(~AAa -BBB* -bbb*), Tag.scan_query("~AAa -BBB* -bbb*"))
     end
     
     should "strip out invalid characters when scanning" do
       assert_equal(%w(aaa bbb), Tag.scan_tags("aaa bbb"))
-      assert_equal(%w(-bb;b* -b_b_b_), Tag.scan_tags("-B,B;B* -b_b_b_"))
+      assert_equal(%w(-BB;B* -b_b_b_), Tag.scan_tags("-B,B;B* -b_b_b_"))
     end
     
     should "cast values" do