尝试通过关闭或全部过滤合并请求时，我会被重定向到500错误页面。我只是做了升级，我想知道旧的合并请求是否是一个问题。我已经对表进行了选择，因为我认为那里有一些空值，而不是假设。
+----+-----------------+--------------------+-------------------+-----------+-------------+--------------------------------------+---------------------+---------------------+--------------+--------+------------------+-------------------+------+------------------------+
| id | target_branch | source_branch | source_project_id | author_id | assignee_id | title | created_at | updated_at | milestone_id | state | merge_status | target_project_id | iid | description |
+----+-----------------+--------------------+-------------------+-----------+-------------+--------------------------------------+---------------------+---------------------+--------------+--------+------------------+-------------------+------+------------------------+
| 1 | master | 139529-aaa-changes | 3 | 1 | 2 | Merging aaa changes back into master | 2014-03-11 23:31:26 | 2014-03-11 23:32:32 | NULL | closed | unchecked | 3 | NULL | NULL |
| 2 | master | 139529-aaa-changes | 3 | 1 | 2 | Merging aaa changes back into master | 2014-03-11 23:33:34 | 2014-03-18 15:06:08 | NULL | merged | unchecked | 3 | NULL | NULL |
| 3 | master | floodlight-tag | 3 | 1 | 2 | Floodlight Tag | 2014-03-17 20:54:12 | 2014-03-21 18:37:52 | NULL | closed | cannot_be_merged | 3 | NULL | NULL |
| 4 | release | AffiliateSitesTest | 5 | 1 | 1 | test | 2014-03-17 20:59:42 | 2014-03-17 20:59:51 | NULL | closed | unchecked | 5 | NULL | NULL |
| 5 | master_20140321 | jsoptimization | 3 | 1 | 1 | Jsoptimization | 2014-03-22 23:25:53 | 2014-03-22 23:26:45 | NULL | closed | unchecked | 3 | 1 | |
| 6 | master_20140321 | floodlight-tag | 3 | 1 | 1 | Floodlight Tag | 2014-03-22 23:28:40 | 2014-03-22 23:29:22 | NULL | closed | cannot_be_merged | 3 | 2 | |
| 7 | stable | packagedates | 3 | 2 | 1 | Packagedates | 2014-03-24 18:56:04 | 2014-03-25 16:56:56 | NULL | merged | unchecked | 3 | 3 | Merge into stable |
| 8 | stable | floodlight-tag | 3 | 1 | 1 | Floodlight Tag | 2014-03-24 19:24:54 | 2014-03-24 19:25:07 | NULL | closed | cannot_be_merged | 3 | 4 | testing |
| 9 | master_20140321 | release | 3 | 1 | 1 | Release | 2014-03-25 17:45:21 | 2014-03-25 17:46:24 | 2 | closed | cannot_be_merged | 3 | 5 | |
| 10 | master | release | 3 | 1 | 1 | Release | 2014-03-25 19:26:20 | 2014-03-25 19:26:47 | NULL | closed | can_be_merged | 3 | 6 | Testing |
| 11 | release | master | 3 | 1 | 1 | Master | 2014-03-25 19:27:31 | 2014-03-25 19:28:51 | NULL | closed | unchecked | 3 | 7 | @akislenko
我查看了日志，我认为这个日志条目是相关的：
ActionView::Template::Error (No route matches {:action=>"show", :controller=>"projects/merge_requests", :project_id=>#<Project id: 5, name: "Affiliate Sites", path: "affiliate-sites", description: nil, created_at: "2013-07-29 14:56:01", updated_at: "2013-07-29 15:07:20", creator_id: 1, issues_enabled: true, wall_enabled: false, merge_requests_enabled: true, wiki_enabled: true, namespace_id: 5, issues_tracker: "gitlab", issues_tracker_id: nil, snippets_enabled: false, last_activity_at: "2014-03-17 20:59:51", import_url: nil, visibility_level: 0, archived: false, import_status: "none">, :id=>#<MergeRequest id: 4, target_branch: "release", source_branch: "AffiliateSitesTest", source_project_id: 5, author_id: 1, assignee_id: 1, title: "test", created_at: "2014-03-17 20:59:42", updated_at: "2014-03-17 20:59:51", milestone_id: nil, state: "closed", merge_status: "unchecked", target_project_id: 5, iid: nil, description: nil>, :format=>nil} missing required keys: [:id]):
1: %li{ class: mr_css_classes(merge_request) }
2: .merge-request-title
3: %span.light= "##{merge_request.iid}"
4: = link_to_gfm truncate(merge_request.title, length: 80), project_merge_request_path(merge_request.target_project, merge_request), class: "row_title"
5: - if merge_request.merged?
6: %small.pull-right
7: %i.icon-ok
app/views/projects/merge_requests/_merge_request.html.haml:4:in `_app_views_projects_merge_requests__merge_request_html_haml__889413478871945037_70150652521800'
app/views/shared/_merge_requests.html.haml:10:in `block (2 levels) in _app_views_shared__merge_requests_html_haml___4127460965921930050_70150652354320'
app/views/shared/_merge_requests.html.haml:9:in `each'
app/views/shared/_merge_requests.html.haml:9:in `block in _app_views_shared__merge_requests_html_haml___4127460965921930050_70150652354320'
app/views/shared/_merge_requests.html.haml:2:in `each'
app/views/shared/_merge_requests.html.haml:2:in `_app_views_shared__merge_requests_html_haml___4127460965921930050_70150652354320'
app/views/dashboard/merge_requests.html.haml:13:in `_app_views_dashboard_merge_requests_html_haml___2670017937016338979_70150653186460'
app/controllers/application_controller.rb:58:in `set_current_user_for_thread'
看起来null iid可能是罪魁祸首？