You can configure default project queries in the following places (#35795):

* App-level: Administration > Projects > Default query (Projects list defaults section)
* User-level: My account > Default project query

git-svn-id: http://svn.redmine.org/redmine/trunk@21281 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/projects_controller.rb

@@ -51,6 +51,7 @@ class ProjectsController < ApplicationController
       return
     end
 
+    retrieve_default_query
     retrieve_project_query
     scope = project_scope
 
@@ -323,4 +324,19 @@ class ProjectsController < ApplicationController
   def retrieve_project_query
     retrieve_query(ProjectQuery, false, :defaults => @default_columns_names)
   end
+
+  def retrieve_default_query
+    return if params[:query_id].present?
+    return if api_request?
+    return if params[:set_filter] && (params.key?(:op) || params.key?(:f))
+
+    if params[:without_default].present?
+      params[:set_filter] = 1
+      return
+    end
+
+    if default_query = ProjectQuery.default
+      params[:query_id] = default_query.id
+    end
+  end
 end