---
status: verifying
trigger: "Single container update via inline keyboard fails with execution errors on both main workflow and container update sub-workflow"
created: 2026-02-09T00:00:00Z
updated: 2026-02-09T00:30:00Z
---

## Current Focus

hypothesis: CONFIRMED - Three bugs in n8n-update.json causing update flow failure
test: Push fixed workflow and trigger update via inline keyboard
expecting: Update should complete without execution errors
next_action: User triggers update to verify fix

## Symptoms

expected: Tapping "Update" on inline keyboard confirmation should trigger container update via GraphQL API
actual: Execution errors on both main workflow and update sub-workflow after confirmation dialog
errors: (1) "Unknown argument 'filter' on field 'Docker.containers'" (2) "missing data.docker.containers" (3) Wrong node reference in Return Error
reproduction: Tap Update on container submenu, confirm, observe error
started: After Phase 16 migration (Docker socket proxy -> Unraid GraphQL API)

## Eliminated

- hypothesis: Credential ID issue (placeholder "unraid-api-key-credential-id")
  evidence: n8n resolves credentials by name on push; actual n8n has correct ID "6DB4RZZoeF5Raf7V"
  timestamp: 2026-02-09

- hypothesis: ContainerId format is wrong (PrefixedID with colon)
  evidence: The PrefixedID format is correct and used by the mutation; the issue is the query using a nonexistent filter arg
  timestamp: 2026-02-09

- hypothesis: Main workflow "Prepare Text Action Input" error is related
  evidence: Execution 1516 was triggered by text command "Start dup", not an update callback - separate bug
  timestamp: 2026-02-09

## Evidence

- timestamp: 2026-02-09
  checked: n8n execution 1498 (main workflow, callback update flow)
  found: Flow reaches "Execute Callback Update" which calls update sub-workflow; sub-workflow fails with "missing data.docker.containers" error
  implication: Error originates in update sub-workflow, propagates back to main workflow

- timestamp: 2026-02-09
  checked: n8n execution 1500 (update sub-workflow)
  found: "Query Single Container" node sends GraphQL query with `filter: { id: "..." }` argument. Unraid API responds HTTP 400: "Unknown argument 'filter' on field 'Docker.containers'"
  implication: The `filter` argument does not exist in Unraid GraphQL API schema. All working queries use `query { docker { containers { ... } } }` without filter

- timestamp: 2026-02-09
  checked: Working queries in n8n-actions.json, n8n-status.json
  found: All working nodes query ALL containers without filter, then filter client-side
  implication: Unraid GraphQL API only supports listing all containers, no server-side filtering

- timestamp: 2026-02-09
  checked: Update sub-workflow flow routing
  found: Main workflow passes containerId (resolved by name). Sub-workflow's "Has Container ID?" = true, routes to "Query Single Container" (broken filter). The "no container ID" path through "Query All Containers" works correctly
  implication: Direct ID path is always taken and always fails

- timestamp: 2026-02-09
  checked: "Return Error" node code
  found: References `$('Format Pull Error')` but node is actually named "Format Update Error"
  implication: Error path would also fail with "node not found" if reached

- timestamp: 2026-02-09
  checked: "Capture Pre-Update State" node
  found: Reads `data.image` (lowercase) from normalizer but normalizer outputs `Image` (capitalized)
  implication: currentImage would always be empty string even if normalizer worked

## Resolution

root_cause: Three bugs in n8n-update.json:
  1. PRIMARY: "Query Single Container" uses nonexistent GraphQL `filter` argument on `Docker.containers`. Unraid API does not support server-side filtering - returns HTTP 400.
  2. SECONDARY: "Return Error" node references `$('Format Pull Error')` but node is named "Format Update Error" (leftover from pre-migration naming).
  3. MINOR: "Capture Pre-Update State" reads `data.image` but normalizer outputs `data.Image` (case mismatch).

fix: |
  1. Changed "Query Single Container" jsonBody from filter-based query to same all-containers query used by working nodes
  2. Rewrote "Normalize Single Container" to fetch all containers, then filter client-side by containerId from trigger data
  3. Fixed "Return Error" node reference from `$('Format Pull Error')` to `$('Format Update Error')`
  4. Fixed "Capture Pre-Update State" property access from `data.image` to `data.Image`

verification: Pushed to n8n (HTTP 200). Awaiting user test of inline keyboard update flow.

files_changed:
  - /home/luc/Projects/unraid-docker-manager/n8n-update.json