ActiveRecord::RecordNotFound in HomeworksController#index

Couldn't find Assignment with ID=16

Rails.root: /home/mcse/igtplus_new_data/projects/Rails/podcast3/trunk

Application Trace | Framework Trace | Full Trace
app/controllers/homeworks_controller.rb:31:in `index'
app/middleware/flash_session_cookie_middleware.rb:13:in `call'

Request

Parameters:

{"assignment_id"=>"16",
 "locale"=>"zh_tw"}

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Response

Headers:

None