Allow nil in the project model on delegated CI/CD settings
What does this MR do?
This is a workaround for a race condition in which attempting to access ci_cd_settings fails because the project it belongs to is being deleted. However, it's not deleted in a transaction so if the ci_cd_settings records have been deleted but the project has not yet, the result is error 500:
Project#ci_default_git_depth delegated to ci_cd_settings.default_git_depth, but ci_cd_settings is nil
That resulted in many transient QA failures across many tests when calling GET /groups/:id. See #321467 (closed)
Credit to @stanhu for suggesting this fix.
Does this MR meet the acceptance criteria?
Conformity
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I have included changelog trailers, or none are needed. (Does this MR need a changelog?) - [-] I have added/updated documentation, or it's not needed. (Is documentation required?)
- [-] I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
- [-] I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
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I have self-reviewed this MR per code review guidelines. -
This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines) -
I have followed the style guides. -
This change is backwards compatible across updates, or this does not apply.
Availability and Testing
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I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.) - [-] I have tested this MR in all supported browsers, or it's not needed.
- [-] I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.
Security
Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.
- [-] Label as security and @ mention
@gitlab-com/gl-security/appsec - [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
- [-] Security reports checked/validated by a reviewer from the AppSec team
Related to #321467 (closed)