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Types ListRecord.Field.message as List<MessageRef> ({value, channel_id, ts,
thread_ts?}) and adds a Gson adapter so one type models the field's asymmetric
wire shape, verified against the live API on two surfaces (slackLists.items.list
and the conversations.history/replies nested list_record path):
- request: each MessageRef serializes to its `value` -> message: ["<permalink>"]
(the API rejects object form: "must provide a string")
- response: deserializes {value, channel_id, ts, thread_ts?} objects, always an
array (no single-object form observed); tolerates bare-string elements too
This supersedes the Message-typed modeling from #1590, whose element type (a
full chat Message) did not match the payload. The now-redundant test
GsonListRecordFieldFactory is removed (default Gson handles List<MessageRef>).
The remote slacklists_Test adds a message column, posts and references a
message, and asserts the echoed reference shape so the generated sample carries
the real message field. Model tests pass (7/7); the remote test passes live.
Fixes the Java half of node-slack-sdk#2598 (node response types generate from
these Java samples). Source-only; the sample regeneration lands via the runner.
Co-Authored-By: Claude <svc-devxp-claude@slack-corp.com>
This was referenced Oct 8, 2026
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Summary
Types the Slack Lists item
messagefield asList<ListRecord.MessageRef>({value, channel_id, ts, thread_ts?}) and adds a Gson adapter so a single type models the field's asymmetric wire shape in both directions.Verified against the live API on two surfaces —
slackLists.items.listand the nestedlist_recordattachment inconversations.history/conversations.replies:MessageRefserializes to itsvalue→message: ["<permalink>"](the API rejects object form:must provide a string){value, channel_id, ts, thread_ts?}objects — always an array,thread_tsonly for threaded replies; no single-object form observed. Tolerates bare-string elements defensively.Why
The prior modeling (#1590) typed the element as a full chat
Message, which does not match the payload (the real element is a lightweight message reference), and normalized a single-object↔array case the API does not actually return on these endpoints. See field-types.This is the Java half of node-slack-sdk#2598 — node response types generate from these Java samples, so the sample must carry the real shape. It also makes node-slack-sdk#2599 / #2600 obsolete (they modeled
Message | Message[]— wrong element type + an unnecessary union).Changes
ListRecord.Field.message→List<MessageRef>; newListRecord.MessageReftype.GsonListRecordMessageRefFactory(direction-aware), registered in the main + testGsonFactory.GsonListRecordFieldFactory(default Gson handlesList<MessageRef>).slacklists_Test(remote): adds a message column, posts + references a message, asserts the echoed reference shape — so the generated sample carries the real field.Verification
ListRecordFieldTest, incl. request-serialize + response-deserialize).slacklists_Test: passes live (3/3) against the Slack API; raw capture confirms{value, channel_id, ts}.Status — EXPERIMENTAL / breaking
This changes the field's public type (was
Message-based). Flagged experimental for review; not for merge-as-is without a call on the breaking change. The sample regeneration is intentionally left to a controlled runner run (the ad-hoc regen bloatedresponse_metadata.messages— kept out of this source PR).🤖 Generated with Claude Code