Merged r12910 and r12911 (#16091).

git-svn-id: http://svn.redmine.org/redmine/branches/2.5-stable@12920 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/issues_controller.rb

@@ -62,6 +62,9 @@ class IssuesController < ApplicationController
       case params[:format]
       when 'csv', 'pdf'
         @limit = Setting.issues_export_limit.to_i
+        if params[:columns] == 'all'
+          @query.column_names = @query.available_inline_columns.map(&:name)
+        end
       when 'atom'
         @limit = Setting.feeds_limit.to_i
       when 'xml', 'json'

app/models/issue_query.rb

@@ -334,6 +334,9 @@ class IssueQuery < Query
       offset(options[:offset])
 
     scope = scope.preload(:custom_values)
+    if has_column?(:author)
+      scope = scope.preload(:author)
+    end
 
     issues = scope.all