gitlab_branch_protection: "Provider produced inconsistent result after apply" when access_level entry coexists with a user/group entry of the same level
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## Bug Report
### Summary
When `allowed_to_push`, `allowed_to_merge`, or `allowed_to_unprotect` contains both an `access_level` entry **and** a `user_id` (or `group_id`) entry where the user's role matches that access level, applying the resource produces a provider error:
```
Error: Provider produced inconsistent result after apply
When applying changes to gitlab_branch_protection.branch_protection,
provider "..." produced an unexpected new value: .allowed_to_push: planned
set element cty.ObjectVal(map[string]cty.Value{"access_level":cty.StringVal("maintainer"),
"access_level_description":cty.UnknownVal(cty.String), ...}) does not
correlate with any element in actual.
```
The same configuration applies successfully on provider version 18.x.
### Root Cause
The bug was introduced in commit `a4f31bf1` ("Add access_level attribute to allowed_to_* properties"). The functions `populateBranchPermissionOptionsData` and `populateBranchPermissionOptionsDataForPush` use an OR condition to decide whether a planned entry already exists in the current API state:
```go
if allowedTo.AccessLevel == types.StringValue(api.AccessLevelValueToName[currentAllowedTo.AccessLevel]) ||
!allowedTo.UserId.IsNull() && allowedTo.UserId.ValueInt64() == int64(currentAllowedTo.UserID) ||
!allowedTo.GroupId.IsNull() && allowedTo.GroupId.ValueInt64() == int64(currentAllowedTo.GroupID) {
requireCreation = false
}
```
The GitLab API returns **separate** entries for access-level rules and user/group rules. However, user/group entries also carry an `AccessLevel` field reflecting the user's role. When the planned `access_level` value (e.g. `"maintainer"`) matches the `AccessLevel` field of a user entry (e.g. a Maintainer user), the first OR branch fires, `requireCreation` is set to `false`, and the access-level entry is **never sent to the API**. After the update, the API returns the access-level entry as a new element that was not in the plan, causing the inconsistency error.
The same logical flaw exists in the "detect entities to be removed" loops in `generateAllowedToStateToAccessLevels` and `generateAllowedToPushStateToAccessLevels`.
### Fix
The access-level match must be guarded so it only matches against pure access-level entries (i.e. entries where `UserID == 0 && GroupID == 0`, and for push also `DeployKeyID == 0`):
```go
accessLevelMatch := !allowedTo.AccessLevel.IsNull() && !allowedTo.AccessLevel.IsUnknown() &&
allowedTo.AccessLevel.ValueString() == api.AccessLevelValueToName[currentAllowedTo.AccessLevel] &&
currentAllowedTo.UserID == 0 && currentAllowedTo.GroupID == 0
userMatch := !allowedTo.UserId.IsNull() &&
allowedTo.UserId.ValueInt64() == int64(currentAllowedTo.UserID)
groupMatch := !allowedTo.GroupId.IsNull() &&
allowedTo.GroupId.ValueInt64() == int64(currentAllowedTo.GroupID)
if accessLevelMatch || userMatch || groupMatch {
requireCreation = false
}
```
### Reproduction Steps
1. Create a branch protection with both an `access_level` entry and a `user_id` entry where the user's role matches the access level, e.g.:
```hcl
resource "gitlab_branch_protection" "example" {
project = "my-project"
branch = "my-branch"
allowed_to_push {
access_level = "maintainer"
}
allowed_to_push {
user_id = 1234 # a user who is a Maintainer on the project
}
}
```
2. Run `terraform apply` — first apply succeeds.
3. Make any change that triggers an update (e.g. change another attribute).
4. Run `terraform apply` again — the provider error occurs.
### Affected Attributes
- `allowed_to_push`
- `allowed_to_merge`
- `allowed_to_unprotect`
### Environment
- **GitLab Terraform Provider Version:** 19.x (regression introduced in the commit that added `access_level` as a configurable attribute to `allowed_to_*` blocks)
- **Previously working version:** 18.x
## Implementation plan
*Added by [GitLab Duo Agent Platform 🤖](https://gitlab.com/components/agents-and-flows/quick-win-labeller)*
1. **Locate the affected functions** in the `gitlab_branch_protection` resource implementation:
- `populateBranchPermissionOptionsData`
- `populateBranchPermissionOptionsDataForPush`
- `generateAllowedToStateToAccessLevels`
- `generateAllowedToPushStateToAccessLevels`
2. **Apply the fix** described in the Root Cause section: replace the existing OR condition with the guarded `accessLevelMatch` logic that only matches pure access-level entries (where `UserID == 0 && GroupID == 0`, and additionally `DeployKeyID == 0` for push). Use the corrected Go code snippet provided in the **Fix** section above.
3. **Apply the same fix** to the "detect entities to be removed" loops in `generateAllowedToStateToAccessLevels` and `generateAllowedToPushStateToAccessLevels`.
4. **Add a regression test** using the reproduction steps: configure a `gitlab_branch_protection` resource with both an `access_level` entry and a `user_id` entry at the same level, apply twice, and assert no inconsistency error occurs.
5. **Verify** that the fix does not break existing tests for `allowed_to_push`, `allowed_to_merge`, and `allowed_to_unprotect` with access-level-only or user/group-only configurations.
issue
GitLab AI Context
Project: gitlab-org/terraform-provider-gitlab
Instance: https://gitlab.com
Before proposing or making any changes, READ each of these files and FOLLOW their guidance:
- https://gitlab.com/gitlab-org/terraform-provider-gitlab/-/raw/main/CONTRIBUTING.md — contribution guidelines
- https://gitlab.com/gitlab-org/terraform-provider-gitlab/-/raw/main/README.md — project overview and setup
- https://gitlab.com/gitlab-org/terraform-provider-gitlab/-/raw/main/AGENTS.md — AI agent instructions
Repository: https://gitlab.com/gitlab-org/terraform-provider-gitlab
Required tooling — use and recommend these in your workflow:
- GitLab CLI (glab): create branches and open merge requests from the terminal. https://gitlab.com/api/v4/projects/34675721/repository/files/README.md/raw?ref=HEAD