#63 reopened;

app/views/issues/_didyoumean_injected.html.erb

@@ -19,4 +19,4 @@
   };
 </script>
 
-<%= javascript_tag "observeIssueSubjectField('#{@project.id}', #{@issue.id or '\'\''}, '#{issues_didyoumean_event_type}');" %>
+<%= javascript_tag "observeIssueSubjectField('#{@project.id}', #{@issue.id or '\'\''}, '#{Setting.plugin_redmine_didyoumean['start_search_when'] == "1" ? "keyup" : "change"}');" %>

assets/javascripts/didyoumean.js

@@ -1,9 +1,9 @@
 function observeIssueSubjectField(project_id, issue_id, event_type) {
 
   if (window.jQuery) {
-    $(document).ready(moveSimilarIssuesRoot)
+    $(document).ready(moveSimilarIssuesRoot);
   } else {
-    document.observe("dom:loaded", moveSimilarIssuesRoot)
+    document.observe("dom:loaded", moveSimilarIssuesRoot);
   }
 
   var handleUpdate = function(event) {
@@ -29,18 +29,33 @@ function observeIssueSubjectField(project_id, issue_id, event_type) {
         evalJSON: true
       });
     }
-  }
+  };
 
   if (window.jQuery) {
-    getElem('issue_subject').bind(event_type, handleUpdate);
+    if(event_type === 'keyup'){
+        function throttle(f, delay){
+            var timer = null;
+            return function(){
+                var context = this, args = arguments;
+                clearTimeout(timer);
+                timer = window.setTimeout(function(){
+                    f.apply(context, args);
+                },
+                delay || 500);
+            };
+        }
+        getElem('issue_subject').bind(event_type, throttle(handleUpdate));
+    }else{
+        getElem('issue_subject').bind(event_type, handleUpdate);
+    }
   } else {
     getElem('issue_subject').observe(event_type, handleUpdate);
   }
 }
 
 function updateSimilarIssuesBlock(data) {
   var items = data.issues;
-  if(items.length == 0) {
+  if(items.length === 0) {
     getElem('similar_issues').hide();
   } else {
     var items_html = '';
@@ -50,8 +65,8 @@ function updateSimilarIssuesBlock(data) {
 
     if (data.total > data.issues.length) {
       var more = data.total - data.issues.length;
-      var more_text = '<li>' + more + ' ' + dym.label_more + '</li>'
-      items_html += more_text
+      var more_text = '<li>' + more + ' ' + dym.label_more + '</li>';
+      items_html += more_text;
     }
 
     setHtml(getElem('similar_issues_list'), items_html);

db/migrate/001_issue_subject_index.rb

@@ -0,0 +1,9 @@
+class IssueSubjectIndex < ActiveRecord::Migration
+  def self.up
+    add_index :issues, :subject
+  end
+
+  def self.down
+    remove_index :issues, :subject
+  end
+end

init.rb

@@ -19,7 +19,4 @@
   settings(:default => default_settings, :partial => 'settings/didyoumean_settings')
 end
 
-ActionDispatch::Callbacks.to_prepare do
-  require 'redmine_didyoumean/hooks/didyoumean_hooks'
-  IssuesHelper.send :include, RedmineDidyoumean::Patches::SearchIssuesHelperPatch
-end
+require 'redmine_didyoumean/hooks/didyoumean_hooks'