执行task时没有代入环境变量

lib/tasks/elasticsearch_batch_op.rake

@@ -1,4 +1,11 @@
 namespace :importer do
+  task :import_all => :environment do
+    Rake::Task["importer:importuser"].execute
+    Rake::Task["importer:importproject"].execute
+    Rake::Task["importer:importcourse"].execute
+    Rake::Task["importer:importattachment"].execute
+    Rake::Task["importer:importmemo"].execute
+  end
   task :importuser => :environment do
     ENV['CLASS']='User'
     ENV['SCOPE']='indexable'