diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index ea55bec7..7c5c1122 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="7b89ff1e-1260-4dcf-9c3d-345de0471ea1" name="Default" comment="" />
+    <list default="true" id="7b89ff1e-1260-4dcf-9c3d-345de0471ea1" name="Default" comment="">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/src/core/service.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/src/core/service.dart" afterDir="false" />
+    </list>
     <ignored path="$PROJECT_DIR$/.tmp/" />
     <ignored path="$PROJECT_DIR$/temp/" />
     <ignored path="$PROJECT_DIR$/tmp/" />
@@ -23,35 +26,32 @@
   </component>
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file leaf-file-name="parameter_meta_test.dart" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/test/parameter_meta_test.dart">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="416">
-              <caret line="26" column="17" selection-start-line="26" selection-start-column="17" selection-end-line="26" selection-end-column="17" />
-              <folding>
-                <element signature="e#0#20#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
       <file leaf-file-name="CHANGELOG.md" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/CHANGELOG.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
               <first_editor relative-caret-position="16">
-                <caret line="1" column="50" selection-start-line="1" selection-start-column="50" selection-end-line="1" selection-end-column="50" />
+                <caret line="1" column="55" selection-start-line="1" selection-start-column="55" selection-end-line="1" selection-end-column="55" />
               </first_editor>
               <second_editor />
             </state>
           </provider>
         </entry>
       </file>
+      <file leaf-file-name="http.dart" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/lib/src/http/http.dart">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="144">
+              <caret line="18" column="26" selection-start-line="18" selection-start-column="26" selection-end-line="18" selection-end-column="26" />
+            </state>
+          </provider>
+        </entry>
+      </file>
       <file leaf-file-name="angel_http.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/src/http/angel_http.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="186">
-              <caret line="167" column="45" selection-start-line="167" selection-start-column="45" selection-end-line="167" selection-end-column="45" />
+            <state relative-caret-position="4432">
+              <caret line="297" column="23" selection-start-line="297" selection-start-column="23" selection-end-line="297" selection-end-column="23" />
             </state>
           </provider>
         </entry>
@@ -59,8 +59,8 @@
       <file leaf-file-name="hooks.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/hooks.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="164">
-              <caret line="135" column="48" lean-forward="true" selection-start-line="135" selection-start-column="48" selection-end-line="135" selection-end-column="48" />
+            <state relative-caret-position="2112">
+              <caret line="135" column="48" selection-start-line="135" selection-start-column="48" selection-end-line="135" selection-end-column="48" />
             </state>
           </provider>
         </entry>
@@ -68,17 +68,17 @@
       <file leaf-file-name="pubspec.yaml" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/pubspec.yaml">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="16">
-              <caret line="1" column="17" selection-start-line="1" selection-start-column="17" selection-end-line="1" selection-end-column="17" />
+            <state relative-caret-position="80">
+              <caret line="5" column="12" selection-start-line="5" selection-start-column="12" selection-end-line="5" selection-end-column="12" />
             </state>
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="path_set.dart" pinned="false" current-in-tab="true">
-        <entry file="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/path-1.6.0/lib/src/path_set.dart">
+      <file leaf-file-name="service.dart" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/lib/src/core/service.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="161">
-              <caret line="77" column="33" selection-start-line="77" selection-start-column="33" selection-end-line="77" selection-end-column="33" />
+            <state relative-caret-position="274">
+              <caret line="78" column="40" lean-forward="true" selection-start-line="78" selection-start-column="40" selection-end-line="78" selection-end-column="40" />
             </state>
           </provider>
         </entry>
@@ -86,7 +86,7 @@
       <file leaf-file-name="http_response_context.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/src/http/http_response_context.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="170">
+            <state relative-caret-position="1360">
               <caret line="89" column="49" selection-start-line="89" selection-start-column="49" selection-end-line="89" selection-end-column="49" />
             </state>
           </provider>
@@ -113,7 +113,7 @@
       <file leaf-file-name="routing_test.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/test/routing_test.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="352">
+            <state relative-caret-position="240">
               <caret line="22" column="12" selection-start-line="22" selection-start-column="12" selection-end-line="22" selection-end-column="12" />
               <folding>
                 <element signature="e#0#17#0" expanded="true" />
@@ -134,8 +134,6 @@
   </component>
   <component name="FindInProjectRecents">
     <findStrings>
-      <find>HttpHeaders.CONTE</find>
-      <find>HttpHeaders</find>
       <find>HttpStatus.FORBIDDEN</find>
       <find>HttpStatus.</find>
       <find>JSON</find>
@@ -164,9 +162,10 @@
       <find>Map&lt;String,</find>
       <find>as</find>
       <find>redirectTo</find>
+      <find>finalizers.t</find>
+      <find>`Iterable`</find>
     </findStrings>
     <replaceStrings>
-      <replace>if (_isClosed &amp;&amp; !_useStream)</replace>
       <replace>logger?.warning</replace>
       <replace>JSON.decode</replace>
       <replace>query</replace>
@@ -196,6 +195,7 @@
       <replace>as $1</replace>
       <replace>as Map$1</replace>
       <replace>IsInstanceOf</replace>
+      <replace>[Iterable]</replace>
     </replaceStrings>
     <dirStrings>
       <dir>C:\Users\thosa\Source\Angel\framework\lib</dir>
@@ -234,7 +234,6 @@
         <option value="$PROJECT_DIR$/analysis_options.yaml" />
         <option value="$PROJECT_DIR$/lib/src/http/http_request_context.dart" />
         <option value="$PROJECT_DIR$/lib/src/stats/stats.dart" />
-        <option value="$PROJECT_DIR$/lib/src/core/service.dart" />
         <option value="$PROJECT_DIR$/lib/src/core/typed_service.dart" />
         <option value="$PROJECT_DIR$/lib/src/core/server.dart" />
         <option value="$PROJECT_DIR$/lib/src/http/http_response_context.dart" />
@@ -270,6 +269,7 @@
         <option value="$PROJECT_DIR$/lib/src/http/angel_http.dart" />
         <option value="$PROJECT_DIR$/CHANGELOG.md" />
         <option value="$PROJECT_DIR$/pubspec.yaml" />
+        <option value="$PROJECT_DIR$/lib/src/core/service.dart" />
       </list>
     </option>
   </component>
@@ -296,7 +296,7 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
-      <pane id="PackagesPane" />
+      <pane id="AndroidView" />
       <pane id="Scope">
         <subPane subId="Project Files">
           <expand>
@@ -320,6 +320,13 @@
               <item name="lib" type="cbb8eebc:String" user="lib" />
               <item name="src" type="cbb8eebc:String" user="src" />
             </path>
+            <path>
+              <item name="Root" type="cbb8eebc:String" user="Root" />
+              <item name="framework" type="cbb8eebc:String" user="framework" />
+              <item name="lib" type="cbb8eebc:String" user="lib" />
+              <item name="src" type="cbb8eebc:String" user="src" />
+              <item name="core" type="cbb8eebc:String" user="core" />
+            </path>
             <path>
               <item name="Root" type="cbb8eebc:String" user="Root" />
               <item name="framework" type="cbb8eebc:String" user="framework" />
@@ -341,7 +348,7 @@
           <select />
         </subPane>
       </pane>
-      <pane id="AndroidView" />
+      <pane id="PackagesPane" />
       <pane id="ProjectPane" />
     </panes>
   </component>
@@ -351,6 +358,7 @@
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
     <property name="dart.analysis.tool.window.force.activate" value="false" />
+    <property name="go.gopath.indexing.explicitly.defined" value="true" />
     <property name="js-jscs-nodeInterpreter" value="C:\Program Files (x86)\nodejs\node.exe" />
     <property name="js.eslint.eslintPackage" value="" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
@@ -673,13 +681,8 @@
       <workItem from="1531145856019" duration="691000" />
       <workItem from="1531146644160" duration="3494000" />
       <workItem from="1531151880119" duration="141000" />
-    </task>
-    <task id="LOCAL-00054" summary="Angel._flattened is now accessible via `optimizedRouter`">
-      <created>1517975513004</created>
-      <option name="number" value="00054" />
-      <option name="presentableId" value="LOCAL-00054" />
-      <option name="project" value="LOCAL" />
-      <updated>1517975513004</updated>
+      <workItem from="1531154836670" duration="378000" />
+      <workItem from="1531407760497" duration="353000" />
     </task>
     <task id="LOCAL-00055" summary="Used function syntax, deprecated `ResponseSerializer` typedef">
       <created>1517975664302</created>
@@ -1017,13 +1020,17 @@
       <option name="project" value="LOCAL" />
       <updated>1531152011317</updated>
     </task>
-    <option name="localTasksCounter" value="103" />
+    <task id="LOCAL-00103" summary="Finalizers before sending">
+      <created>1531155020859</created>
+      <option name="number" value="00103" />
+      <option name="presentableId" value="LOCAL-00103" />
+      <option name="project" value="LOCAL" />
+      <updated>1531155020859</updated>
+    </task>
+    <option name="localTasksCounter" value="104" />
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="All_Tests - 2018.06.10 at 19h 15m 03s.xml">
-      <configuration name="All Tests" configurationId="DartTestRunConfigurationType" />
-    </history-entry>
     <history-entry file="All_Tests - 2018.06.10 at 19h 15m 55s.xml">
       <configuration name="All Tests" configurationId="DartTestRunConfigurationType" />
     </history-entry>
@@ -1051,9 +1058,12 @@
     <history-entry file="All_Tests - 2018.07.09 at 11h 06m 50s.xml">
       <configuration name="All Tests" configurationId="DartTestRunConfigurationType" />
     </history-entry>
+    <history-entry file="All_Tests - 2018.07.09 at 12h 48m 12s.xml">
+      <configuration name="All Tests" configurationId="DartTestRunConfigurationType" />
+    </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="158754000" />
+    <option name="totallyTimeSpent" value="159485000" />
   </component>
   <component name="TodoView">
     <todo-panel id="selected-file">
@@ -1084,14 +1094,13 @@
       <window_info id="UI Designer" order="2" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.39857143" />
       <window_info anchor="bottom" id="TODO" order="6" weight="0.32714286" />
-      <window_info anchor="bottom" id="Messages" order="7" weight="0.33478895" />
       <window_info anchor="right" id="Palette&#9;" order="3" />
       <window_info id="Image Layers" order="2" />
       <window_info anchor="right" id="Capture Analysis" order="3" />
-      <window_info anchor="bottom" id="Run" order="2" sideWeight="0.4964476" weight="0.3973799" />
       <window_info anchor="bottom" id="Version Control" order="7" weight="0.32905984" />
-      <window_info active="true" anchor="bottom" id="Terminal" order="7" visible="true" weight="0.44978166" />
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.2608376" />
+      <window_info anchor="bottom" id="Run" order="2" sideWeight="0.4964476" weight="0.3973799" />
+      <window_info anchor="bottom" id="Terminal" order="7" weight="0.44978166" />
+      <window_info content_ui="combo" id="Project" order="0" weight="0.26818517" />
       <window_info anchor="right" id="SciView" order="4" />
       <window_info anchor="right" id="Theme Preview" order="3" />
       <window_info id="Favorites" order="3" side_tool="true" />
@@ -1104,6 +1113,7 @@
       <window_info id="DB Browser" order="2" weight="0.32998413" />
       <window_info anchor="bottom" id="Find" order="1" weight="0.32905984" />
       <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
+      <window_info anchor="bottom" id="Messages" order="7" weight="0.33478895" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="right" id="Data View" order="4" />
     </layout>
@@ -1116,7 +1126,6 @@
   </component>
   <component name="VcsManagerConfiguration">
     <option name="CHECK_CODE_SMELLS_BEFORE_PROJECT_COMMIT" value="false" />
-    <MESSAGE value="Bring back zones; mysterious hang" />
     <MESSAGE value="Fixed tests" />
     <MESSAGE value="CHANGELOG" />
     <MESSAGE value="Update example" />
@@ -1141,7 +1150,8 @@
     <MESSAGE value="* Apply `fold` in `redirectToAction`; bump version -&gt; 1.1.4+9" />
     <MESSAGE value="Patch" />
     <MESSAGE value="Bump" />
-    <option name="LAST_COMMIT_MESSAGE" value="Bump" />
+    <MESSAGE value="Finalizers before sending" />
+    <option name="LAST_COMMIT_MESSAGE" value="Finalizers before sending" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
@@ -1190,13 +1200,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/lib/src/core/service.dart">
-      <provider selected="true" editor-type-id="text-editor">
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     <entry file="file://$PROJECT_DIR$/lib/src/core/typed_service.dart">
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@@ -1325,13 +1328,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/lib/src/http/http.dart">
-      <provider selected="true" editor-type-id="text-editor">
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     <entry file="file://$PROJECT_DIR$/lib/src/core/map_service.dart">
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@@ -1350,9 +1346,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="448">
           <caret line="28" column="17" selection-start-line="28" selection-start-column="17" selection-end-line="28" selection-end-column="17" />
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-            <element signature="e#0#54#0" expanded="true" />
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@@ -1367,9 +1360,6 @@
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         <state relative-caret-position="436">
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-            <element signature="e#38#92#0" expanded="true" />
-          </folding>
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@@ -1417,7 +1407,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/test/parameter_meta_test.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="416">
+        <state relative-caret-position="336">
           <caret line="26" column="17" selection-start-line="26" selection-start-column="17" selection-end-line="26" selection-end-column="17" />
           <folding>
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@@ -1427,7 +1417,7 @@
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     <entry file="file://$PROJECT_DIR$/test/routing_test.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="352">
+        <state relative-caret-position="240">
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           <folding>
             <element signature="e#0#17#0" expanded="true" />
@@ -1451,29 +1441,37 @@
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     <entry file="file://$PROJECT_DIR$/lib/src/http/http_response_context.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="170">
+        <state relative-caret-position="1360">
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     <entry file="file://$PROJECT_DIR$/lib/hooks.dart">
       <provider selected="true" editor-type-id="text-editor">
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-          <caret line="135" column="48" lean-forward="true" selection-start-line="135" selection-start-column="48" selection-end-line="135" selection-end-column="48" />
+        <state relative-caret-position="2112">
+          <caret line="135" column="48" selection-start-line="135" selection-start-column="48" selection-end-line="135" selection-end-column="48" />
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     </entry>
-    <entry file="file:///usr/local/Cellar/dart/2.0.0-dev.65.0/libexec/lib/async/future.dart">
+    <entry file="file:///usr/local/Cellar/dart/2.0.0-dev.65.0/libexec/lib/async/future.dart" />
+    <entry file="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/path-1.6.0/lib/src/path_set.dart">
       <provider selected="true" editor-type-id="text-editor">
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-          <caret line="631" column="39" selection-start-line="631" selection-start-column="39" selection-end-line="631" selection-end-column="39" />
+        <state relative-caret-position="470">
+          <caret line="77" column="33" selection-start-line="77" selection-start-column="33" selection-end-line="77" selection-end-column="33" />
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+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/src/http/http.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="144">
+          <caret line="18" column="26" selection-start-line="18" selection-start-column="26" selection-end-line="18" selection-end-column="26" />
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     <entry file="file://$PROJECT_DIR$/lib/src/http/angel_http.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="186">
-          <caret line="167" column="45" selection-start-line="167" selection-start-column="45" selection-end-line="167" selection-end-column="45" />
+        <state relative-caret-position="4432">
+          <caret line="297" column="23" selection-start-line="297" selection-start-column="23" selection-end-line="297" selection-end-column="23" />
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     </entry>
@@ -1481,7 +1479,7 @@
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
           <first_editor relative-caret-position="16">
-            <caret line="1" column="50" selection-start-line="1" selection-start-column="50" selection-end-line="1" selection-end-column="50" />
+            <caret line="1" column="55" selection-start-line="1" selection-start-column="55" selection-end-line="1" selection-end-column="55" />
           </first_editor>
           <second_editor />
         </state>
@@ -1489,15 +1487,15 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/pubspec.yaml">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="16">
-          <caret line="1" column="17" selection-start-line="1" selection-start-column="17" selection-end-line="1" selection-end-column="17" />
+        <state relative-caret-position="80">
+          <caret line="5" column="12" selection-start-line="5" selection-start-column="12" selection-end-line="5" selection-end-column="12" />
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       </provider>
     </entry>
-    <entry file="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/path-1.6.0/lib/src/path_set.dart">
+    <entry file="file://$PROJECT_DIR$/lib/src/core/service.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="161">
-          <caret line="77" column="33" selection-start-line="77" selection-start-column="33" selection-end-line="77" selection-end-column="33" />
+        <state relative-caret-position="274">
+          <caret line="78" column="40" lean-forward="true" selection-start-line="78" selection-start-column="40" selection-end-line="78" selection-end-column="40" />
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     </entry>
diff --git a/lib/src/core/service.dart b/lib/src/core/service.dart
index ca464e7d..659ee639 100644
--- a/lib/src/core/service.dart
+++ b/lib/src/core/service.dart
@@ -64,6 +64,33 @@ class Service extends Routable {
   /// Closes this service, including any database connections or stream controllers.
   void close() {}
 
+  /// Retrieves the first object from the result of calling [index] with the given [params].
+  ///
+  /// If the result of [index] is `null`, OR an empty [Iterable], a 404 `AngelHttpException` will be thrown.
+  ///
+  /// If the result is both non-null and NOT an [Iterable], it will be returned as-is.
+  ///
+  /// If the result is a non-empty [Iterable], [findOne] will return `it.first`, where `it` is the aforementioned [Iterable].
+  ///
+  /// A custom [errorMessage] may be provided.
+  Future findOne(
+      [Map params,
+      String errorMessage = 'No record was found matching the given query.']) {
+    return index(params).then((result) {
+      if (result == null) {
+        throw new AngelHttpException.notFound(message: errorMessage);
+      } else if (result is Iterable) {
+        if (result.isEmpty) {
+          throw new AngelHttpException.notFound(message: errorMessage);
+        } else {
+          return result.first;
+        }
+      } else {
+        return result;
+      }
+    });
+  }
+
   /// Retrieves all resources.
   Future index([Map params]) {
     throw new AngelHttpException.methodNotAllowed();