plandex-ai/plandex · error

Error getting parent branch:

Error message

Error getting parent branch: 

What it means

After parsing the request, CreateBranchHandler fetches the parent branch record with db.GetDbBranch(planId, branch) (branch from the URL path) and returns HTTP 500 'Error getting parent branch: <err>' on failure. This resolves the DB row for the branch the new branch will fork from; failure means the lookup itself errored (DB issue) rather than the branch simply not existing.

Source

Thrown at app/server/handlers/branches.go:121

		return
	}
	defer func() {
		log.Println("Closing request body")
		r.Body.Close()
	}()

	var req shared.CreateBranchRequest
	if err := json.Unmarshal(body, &req); err != nil {
		log.Printf("Error parsing request body: %v\n", err)
		http.Error(w, "Error parsing request body ", http.StatusBadRequest)
		return
	}

	parentBranch, err := db.GetDbBranch(planId, branch)

	if err != nil {
		log.Printf("Error getting parent branch: %v\n", err)
		http.Error(w, "Error getting parent branch: "+err.Error(), http.StatusInternalServerError)
		return
	}

	ctx, cancel := context.WithCancel(r.Context())

	err = db.ExecRepoOperation(db.ExecRepoOperationParams{
		OrgId:    auth.OrgId,
		UserId:   auth.User.Id,
		PlanId:   planId,
		Branch:   "main",
		Reason:   "create branch",
		Scope:    db.LockScopeWrite,
		Ctx:      ctx,
		CancelFn: cancel,
	}, func(repo *db.GitRepo) error {

		err := db.WithTx(ctx, "create branch", func(tx *sqlx.Tx) error {
			_, err = db.CreateBranch(repo, plan, parentBranch, req.Name, tx)

View on GitHub (pinned to e2d772072e)

Solutions

1. Check the server log for the wrapped error from GetDbBranch to distinguish DB connectivity from query errors
2. Verify the parent branch path variable is a valid existing branch name for the plan
3. Confirm the database is healthy and migrations are up to date
4. Retry after transient DB issues resolve

Example fix

// before
parentBranch, err := db.GetDbBranch(planId, branch)
// after
parentBranch, err := db.GetDbBranch(planId, branch)
if err != nil {
    return fmt.Errorf("get parent branch %s for plan %s: %w", branch, planId, err)
}

// client: confirm parent branch exists before creating a child
branches, err := listBranches(planId)
if err != nil { return err }
if !slices.Contains(branches, parentBranch) {
    return fmt.Errorf("parent branch %q does not exist", parentBranch)
}

// distinguish transient DB errors for retry
if resp.StatusCode == http.StatusInternalServerError && strings.Contains(body, "sql:") {
    return retryWithBackoff(...)
}

When it happens

Trigger: POST to create a branch whose parent path variable references a branch lookup that errors — database connectivity failure, query timeout, or a corrupted plans/branches table row; also context/tx issues inside GetDbBranch.

Common situations: Database temporarily unavailable or restarted; connection pool exhausted under load; planId/branch path variable malformed causing a query error; migrated schema where the branches table is missing or drifted.

Understand the failure class

Background: Database query failed: Internal Server Error 500s wrapping SQL, Prisma, and connection failures — what to check first — this error's family across 16 libraries.

Related errors

• branch not found
• error getting current plan state params: %v
• error getting contexts: %v
• error loading plan: %v
• error validating project

AI-assisted analysis of plandex-ai/plandex@e2d772072e (2026-09-05). Data as JSON: /api/errors/d3eccf3c4d4a312a. Report an issue: GitHub.