* denormalized flags to FlagCount

* don't query all votes for every quote that is rendered

Src/VideoGameQuotes.Api/Mappings/Quote.hbm.xml

@@ -13,9 +13,10 @@
 		<many-to-one name="Game" column="game_id" not-null="true" foreign-key="fk_quote_game" fetch="join" />
 
 		<!-- denormalization for performance purposes -->
-		<property name="Score" column="score" not-null="false" index="idx_score_upvotes" />
+		<property name="Score" column="score" not-null="true" index="idx_score_upvotes" />
-		<property name="UpVotes" column="upvotes" not-null="false" index="idx_score_upvotes" />
+		<property name="UpVotes" column="upvotes" not-null="true" index="idx_score_upvotes" />
-		<property name="DownVotes" column="downvotes" not-null="false" />
+		<property name="DownVotes" column="downvotes" not-null="true" />
+		<property name="FlagCount" column="flag_count" not-null="true" />
 
 		<set access="nosetter.camelcase" name="Categories" table="quote_category_map">
 			<key column="quote_id" />

Src/VideoGameQuotes.Api/Quote.cs

@@ -48,23 +48,31 @@ namespace VideoGameQuotes.Api {
 		}
 
 		public virtual Quote AddFlag(string comment, QuoteFlagType type, User user) {
-			flags.Add(new QuoteFlag {
+			var flag = new QuoteFlag {
 				Comment = comment,
 				Type = type,
 				User = user,
 				Quote = this
-			});
+			};
+
+			if (flags.Add(flag)) {
+				FlagCount++;
+			}
 
 			return this;
 		}
 
 		public virtual Quote RemoveFlag(QuoteFlag flag) {
-			flags.Remove(flag);
+			if (flags.Remove(flag)) {
+				FlagCount--;
+			}
+
 			return this;
 		}
 
 		public virtual void ClearFlags() {
 			flags.Clear();
+			FlagCount = 0;
 		}
 		#endregion
 
@@ -112,6 +120,7 @@ namespace VideoGameQuotes.Api {
 		public virtual int UpVotes { get; private set; }
 		public virtual int DownVotes { get; private set; }
 		public virtual int Score { get; private set; }
+		public virtual int FlagCount { get; private set; }
 		
 		public virtual QuoteDto ToDto() {
 			return new QuoteDto {

Src/VideoGameQuotes.Web/Controllers/QuoteController.cs

@@ -81,6 +81,8 @@ namespace VideoGameQuotes.Web.Controllers {
 				};
 
 				return Json(this.CreateJsonResponse(null, data));
+			} catch (CannotVoteTwiceException) {
+				return Json(this.CreateJsonErrorResponse("You have already voted for this quote; you can reverse your vote by voting in the other direction"));
 			} catch {
 				return Json(this.CreateJsonErrorResponse("An error occurred while trying to process your vote"));
 			}

Src/VideoGameQuotes.Web/Views/Shared/SingleQuote.ascx

@@ -6,15 +6,11 @@
 		<div class="quote-data clearfix">
 			<div class="quote-score-container">
 				<div class="vote-container">
-					<% if (!Model.VotedUp) { %> 
 					<span class="vote-for" title="I like this quote">&#x25B2;</span>
-					<% } %>
 				</div>
 				<div class="quote-score" title="+<%= Model.Quote.UpVotes %>, -<%= Model.Quote.DownVotes %>"><%= Model.Quote.Score %></div>
 				<div class="vote-container">
-					<% if (!Model.VotedDown) { %> 
 					<span class="vote-against" title="I hate this quote">&#x25BC;</span>
-					<% } %>
 				</div>
 			</div>
 
@@ -36,7 +32,7 @@
 				<a class="quote-permalink" href="<%= Url.Action("quote", "quote", new { id = Model.Quote.Id, text = Model.Quote.GetUrlFriendlyText() }) %>" title="permanent link to this quote"></a>
 				<% if (Model.User != null && Model.User.Group >= UserGroup.Admin) { %>
 				<a class="edit-link" href="<%= Url.Action("edit", "quote", new { id = Model.Quote.Id }) %>" title="edit this quote"></a>
-				<small>(<%= Model.Quote.Flags.Count() %>)</small>
+				<small>(<%= Model.Quote.FlagCount %>)</small>
 				<% } %>
 			</p>
 		</div>

Tests/VideoGameQuotes.Api.Tests/NHibernate/SchemaExporter.cs

@@ -151,11 +151,19 @@ namespace VideoGameQuotes.Api.Tests.NHibernate {
 				.AddPublisher(kaga)
 				.AddPublisher(sega);
 
+			var zelda2 = new Game { Creator = creator, Name = "Zelda II: The Adventure of Link", Website = "http://en.wikipedia.org/wiki/Zelda_II:_The_Adventure_of_Link", Region = Region.NorthAmerica | Region.Japan | Region.PAL }
+				.AddSystem(nes)
+				.AddSystem(fds)
+				.AddSystem(gba)
+				.AddSystem(gcn)
+				.AddPublisher(nintendo);
+
 			using (var tx = session.BeginTransaction()) {
 				var repo = new NHibernateRepository<Game>(session);
 				repo.Save(loz);
 				repo.Save(crystalis);
 				repo.Save(zeroWing);
+				repo.Save(zelda2);
 				tx.Commit();
 			}
 			#endregion
@@ -175,9 +183,12 @@ namespace VideoGameQuotes.Api.Tests.NHibernate {
 			var hopOnMyBack = new Quote { Creator = creator, Game = crystalis, Text = "Please hop on my back. I'll take you wherever you like." }
 				.AddCategory(dolphins);
 
+			var error = new Quote { Creator = creator, Game = zelda2, Text = "I am Error." };
+
 			using (var tx = session.BeginTransaction()) {
 				var repo = new NHibernateRepository<Quote>(session);
 				repo.Save(allYourBase);
+				repo.Save(error);
 				repo.Save(dangerousToGoAlone);
 				repo.Save(hopOnMyBack);
 				repo.Save(dodongo);

Tests/VideoGameQuotes.Api.Tests/NHibernate/schema.sql

@@ -148,9 +148,10 @@ alter table quote_category_map  drop foreign key FK5892F846C2AA09DD
        modified DATETIME,
        creator INTEGER not null,
        game_id INTEGER not null,
-       score INTEGER,
+       score INTEGER not null,
-       upvotes INTEGER,
+       upvotes INTEGER not null,
-       downvotes INTEGER,
+       downvotes INTEGER not null,
+       flag_count INTEGER not null,
        primary key (quote_id)
     );