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What happened

My GitLab version is 11.1.4. Some pull_requests have been merged, but the GitLab APIs did not return merge_date, resulting in the merge_date field of the pull_request table being empty, and then there is a problem with the calculation logic behind it, the APIs returns the following payload:

[{"id":5,"iid":5,"project_id":1,"title":"feature620-1","description":"","state":"merged","created_at":"2023-06-19T16:50:55.534+08:00","updated_at":"2023-06-19T16:51:13.120+08:00","target_branch":"master","source_branch":"feature620","upvotes":0,"downvotes":0,"author":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"assignee":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"source_project_id":1,"target_project_id":1,"labels":[],"work_in_progress":false,"milestone":null,"merge_when_pipeline_succeeds":false,"merge_status":"can_be_merged","sha":"f44aebb41056fc9d5053599d0d6f270900b68dda","merge_commit_sha":"c68d591a86fcf8ccdf01b319fdb242708cb7340e","user_notes_count":0,"discussion_locked":null,"should_remove_source_branch":null,"force_remove_source_branch":false,"web_url":"http://10.89.168.63:8081/root/sample/merge_requests/5","time_stats":{"time_estimate":0,"total_time_spent":0,"human_time_estimate":null,"human_total_time_spent":null},"squash":false},{"id":4,"iid":4,"project_id":1,"title":"Feature618","description":"","state":"merged","created_at":"2023-06-18T14:15:00.749+08:00","updated_at":"2023-06-18T14:16:27.829+08:00","target_branch":"master","source_branch":"feature618","upvotes":0,"downvotes":0,"author":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"assignee":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"source_project_id":1,"target_project_id":1,"labels":[],"work_in_progress":false,"milestone":null,"merge_when_pipeline_succeeds":false,"merge_status":"can_be_merged","sha":"f425c59ed7f6825fa5b816333501c82008d8acd1","merge_commit_sha":"9ddfbb5e809d95ec44a70d4ab310e1d4c4f3fe2e","user_notes_count":1,"discussion_locked":null,"should_remove_source_branch":null,"force_remove_source_branch":true,"web_url":"http://10.89.168.63:8081/root/sample/merge_requests/4","time_stats":{"time_estimate":0,"total_time_spent":0,"human_time_estimate":null,"human_total_time_spent":null},"squash":false},{"id":3,"iid":3,"project_id":1,"title":"设置80端口","description":"设置80端口--完成","state":"merged","created_at":"2023-06-18T11:27:06.924+08:00","updated_at":"2023-06-18T11:27:11.581+08:00","target_branch":"master","source_branch":"feature-617","upvotes":0,"downvotes":0,"author":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"assignee":null,"source_project_id":1,"target_project_id":1,"labels":[],"work_in_progress":false,"milestone":null,"merge_when_pipeline_succeeds":false,"merge_status":"can_be_merged","sha":"58b4bbc198ffb1ab1eba42f4ebfdbbb3f75ad777","merge_commit_sha":"85c8e01001535672720d80751a6abd07bab4bc21","user_notes_count":0,"discussion_locked":null,"should_remove_source_branch":null,"force_remove_source_branch":false,"web_url":"http://10.89.168.63:8081/root/sample/merge_requests/3","time_stats":{"time_estimate":0,"total_time_spent":0,"human_time_estimate":null,"human_total_time_spent":null},"squash":false},{"id":2,"iid":2,"project_id":1,"title":"feature617-2 commit","description":"添加springboot基础配置","state":"merged","created_at":"2023-06-18T10:48:31.249+08:00","updated_at":"2023-06-18T10:48:36.565+08:00","target_branch":"master","source_branch":"feature-617","upvotes":0,"downvotes":0,"author":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"assignee":null,"source_project_id":1,"target_project_id":1,"labels":[],"work_in_progress":false,"milestone":null,"merge_when_pipeline_succeeds":false,"merge_status":"can_be_merged","sha":"8be390c067b3605d86d934b90ce2c9dd7704e069","merge_commit_sha":"4eeda69fb6338f787489f315a44f9ff819898aca","user_notes_count":0,"discussion_locked":null,"should_remove_source_branch":null,"force_remove_source_branch":false,"web_url":"http://10.89.168.63:8081/root/sample/merge_requests/2","time_stats":{"time_estimate":0,"total_time_spent":0,"human_time_estimate":null,"human_total_time_spent":null},"squash":false},{"id":1,"iid":1,"project_id":1,"title":"feature617-1 commit","description":"","state":"merged","created_at":"2023-06-17T22:51:21.079+08:00","updated_at":"2023-06-17T22:51:26.507+08:00","target_branch":"master","source_branch":"feature-617","upvotes":0,"downvotes":0,"author":{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":"https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon","web_url":"http://10.89.168.63:8081/root"},"assignee":null,"source_project_id":1,"target_project_id":1,"labels":[],"work_in_progress":false,"milestone":null,"merge_when_pipeline_succeeds":false,"merge_status":"can_be_merged","sha":"e72fa99c78d87cfca6f6b40ecb16fafa65648373","merge_commit_sha":"47c685aefff3fa26d2cf37966c02d3dd34d20ddd","user_notes_count":0,"discussion_locked":null,"should_remove_source_branch":null,"force_remove_source_branch":false,"web_url":"http://10.89.168.63:8081/root/sample/merge_requests/1","time_stats":{"time_estimate":0,"total_time_spent":0,"human_time_estimate":null,"human_total_time_spent":null},"squash":false}]

What do you expect to happen

In case this version of gitlab does not return merge_date, consider other solutions to the merge_date problem.

How to reproduce

Use DevLake to collect GitLab v11.1.4 data

Anything else

No response

Version

v0.17

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct