Begin of the insertion## ADR: Extracting Journal#notes to Comments

End of the insertion <figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="https://community.openproject.org/api/v3/attachments/360549/content"></div></figure>

Begin of the insertion## ContextEnd of the insertion Begin of the deletion <br>End of the deletion

Begin of the insertion**WhatEnd of the insertion Begin of the deletion ### Context&nbsp;

_WhatEnd of the deletion is the issue that is motivating this decision or Begin of the insertionchange?**

End of the insertion Begin of the deletion change?_
End of the deletion See Begin of the insertion#62381End of the insertion Begin of the deletion ###62381End of the deletion

Begin of the insertionCurrently, workEnd of the insertion Begin of the deletion WorkEnd of the deletion package activity comments are Begin of the insertionstoredEnd of the insertion Begin of the deletion currently definedEnd of the deletion as Begin of the insertion`Journal#notes`. The `Journals`End of the insertion Begin of the deletion Journal#notes, Journals is aEnd of the deletion model Begin of the insertionis designed to captureEnd of the insertion Begin of the deletion that keeps track ofEnd of the deletion data snapshots/changes Begin of the insertionforEnd of the insertion Begin of the deletion ofEnd of the deletion any &quot;Journable&quot; Begin of the insertionobject,End of the insertion providing a historical Begin of the insertiontimeline of changes. For example, inEnd of the insertion Begin of the deletion data changeset timeline. E.g. InEnd of the deletion a Begin of the insertion`WorkPackage`,End of the insertion Begin of the deletion WorkPackage,End of the deletion it allows Begin of the insertiontracking attributeEnd of the insertion Begin of the deletion us to say track attributesEnd of the deletion changes such as &quot;Assignee was changed from UserA to UserB&quot;.

Begin of the insertionHowever, thereEnd of the insertion Begin of the deletion ThereEnd of the deletion are several nuances to this model that Begin of the insertiondoEnd of the insertion Begin of the deletion areEnd of the deletion not Begin of the insertionalign well with the intended behavior ofEnd of the insertion Begin of the deletion necessarily relevant toEnd of the deletion a Begin of the insertionstandaloneEnd of the insertion &quot;Comments&quot; model:

Begin of the insertion* **Data Intensive:** EveryEnd of the insertion Begin of the deletion 1. It is data intensive, everyEnd of the deletion time a new journal is Begin of the insertionlogged,End of the insertion Begin of the deletion loggedEnd of the deletion a full Begin of the deletion dataEnd of the deletion snapshot of the &quot;Journable&quot; Begin of the insertion(e.g., `WorkPackage`)End of the insertion Begin of the deletion e.g. &quot;WorkPackage&quot;End of the deletion is Begin of the insertionstored, regardless of whether the changeEnd of the insertion Begin of the deletion stored.

2. ThereEnd of the deletion is Begin of the insertioncomment-related.

* **Aggregation Complexity:** Journals supportEnd of the insertion a configurable Begin of the deletion journalEnd of the deletion aggregation validity period, Begin of the insertionallowing changes within a certain time frameEnd of the insertion Begin of the deletion that allows &quot;changes&quot;End of the deletion to be Begin of the insertionmergedEnd of the insertion Begin of the deletion aggregatedEnd of the deletion into Begin of the insertiona single journal.End of the insertion Begin of the deletion one Journal if the change falls within the aggregation period

1. End of the deletion This Begin of the deletion aggregationEnd of the deletion introduces Begin of the insertioncomplexity,End of the insertion Begin of the deletion some complexityEnd of the deletion such as Begin of the deletion the need forEnd of the deletion virtual sequencing when rendering Begin of the insertionactivitiesEnd of the insertion Begin of the deletion Activities,End of the deletion so Begin of the deletion thatEnd of the deletion they are numbered sequentially Begin of the insertion(1..n).

* **Unnecessary Snapshots for Comments:** Each newEnd of the insertion Begin of the deletion 1..n

3. Every time aEnd of the deletion comment Begin of the insertionresults inEnd of the insertion Begin of the deletion is added,End of the deletion a Begin of the insertionfullEnd of the insertion Begin of the deletion newEnd of the deletion data Begin of the insertionsnapshot,End of the insertion Begin of the deletion &quot;Snapshot&quot; is (unnecessarily) created,End of the deletion overriding the aggregation period Begin of the insertionifEnd of the insertion Begin of the deletion in the case thatEnd of the deletion subsequent journals with notes (comments) are Begin of the insertionadded.End of the insertion Begin of the deletion createdEnd of the deletion

Begin of the insertion* **Complex Features:** Journals powerEnd of the insertion Begin of the deletion 4. It powers complex, data and performance intensiveEnd of the deletion features such as Begin of the insertion[baseline comparison](https://www.openproject.org/docs/user-guide/work-packages/baseline-comparison/), which are data and performance-intensive.End of the insertion Begin of the deletion the [Baseline Comparison](https://www.openproject.org/docs/user-guide/work-packages/baseline-comparison/)End of the deletion

Begin of the insertion* **Overloaded Concepts:**End of the insertion Begin of the deletion 5. End of the deletion The Begin of the insertionideaEnd of the insertion Begin of the deletion conceptEnd of the deletion of &quot;internal comments&quot; is superimposed onto the Begin of the insertion`Journals`End of the insertion Begin of the deletion JournalsEnd of the deletion table, even though it&#39;s Begin of the deletion isEnd of the deletion not relevant to all Journables.

Begin of the insertion* **Irrelevant Relations:** RelationsEnd of the insertion Begin of the deletion 6. Comment relationsEnd of the deletion such as Begin of the insertion`EmojiReaction`End of the insertion Begin of the deletion EmojiReactionEnd of the deletion and Begin of the insertion`Attachment`End of the insertion Begin of the deletion AttachmentEnd of the deletion are Begin of the deletion alsoEnd of the deletion imposed on the Journal Begin of the insertionmodel, even whenEnd of the insertion Begin of the deletion model albeitEnd of the deletion not Begin of the deletion relevant toEnd of the deletion all Journables Begin of the insertionneed them.End of the insertion


Begin of the deletion <br>

End of the deletion 📖 See the [Journals::CreateService](https://github.com/opf/openproject/blob/258af380b4401de54b917aeffa125e60e6b35ae7/app/services/journals/create_service.rb#L105-L196) for more details on Begin of the insertiontheEnd of the insertion inner Begin of the insertionworkings.End of the insertion Begin of the deletion workingsEnd of the deletion

Begin of the insertion##End of the insertion Begin of the deletion ###

###End of the deletion Decision

Begin of the insertion**WhatEnd of the insertion Begin of the deletion _What is theEnd of the deletion change Begin of the insertionare weEnd of the insertion Begin of the deletion that we&#39;reEnd of the deletion proposing or Begin of the insertionmaking?**End of the insertion Begin of the deletion making?_End of the deletion

Begin of the insertion* End of the insertion Extract Begin of the insertion`Journal#notes` into a dedicated `Comments` model.

* DefineEnd of the insertion Begin of the deletion Journal#notes to the Comments model, defineEnd of the deletion an &quot;Events&quot; SQL Begin of the insertionviewEnd of the insertion Begin of the deletion ViewEnd of the deletion that joins Journals and Comments into a Begin of the insertionunified,End of the insertion chronological Begin of the insertiontimeline.


## Data MigrationEnd of the insertion Begin of the deletion viewEnd of the deletion

Begin of the deletion ##### _Data Migration_

* End of the deletion Journals Begin of the insertionrepresentEnd of the insertion Begin of the deletion isEnd of the deletion one of the largest Begin of the insertiondatasets in the system, so migratingEnd of the insertion Begin of the deletion dataset, and it&#39;s possible aEnd of the deletion data Begin of the insertionmayEnd of the insertion Begin of the deletion migration wouldEnd of the deletion be Begin of the insertiontime-intensive. ExtensiveEnd of the insertion Begin of the deletion time intensive- run adequateEnd of the deletion tests Begin of the insertionshould be conductedEnd of the insertion during Begin of the insertionimplementation. If necessary,End of the insertion Begin of the deletion implementation,End of the deletion consider Begin of the insertionperforming theEnd of the insertion data migration via background Begin of the insertionjobs, though this adds complexity (see #65240).

##End of the insertion Begin of the deletion jobs if necessary albeit more complicated #65240


###

###End of the deletion Consequences

Begin of the insertion**WhatEnd of the insertion Begin of the deletion _WhatEnd of the deletion becomes easier or more difficult Begin of the deletion to doEnd of the deletion as a result of this Begin of the insertionchange?**End of the insertion Begin of the deletion change?_End of the deletion

Begin of the insertion**Pros:**

* End of the insertion Begin of the deletion 1. Pro:End of the deletion **Separation of Begin of the insertionConcerns:**End of the insertion Begin of the deletion concerns**; It becomes easier to manageEnd of the deletion Comments Begin of the insertioncan be managedEnd of the insertion as a standalone Begin of the insertionentity, reducing the risk of unintendedEnd of the insertion Begin of the deletion entity without having to worry aboutEnd of the deletion Journal side-effects.

Begin of the insertion* End of the insertion Begin of the deletion 2. Pro:End of the deletion **Data Begin of the insertionReduction:** AEnd of the insertion Begin of the deletion reduction**; aEnd of the deletion full Journable snapshot Begin of the insertionwillEnd of the insertion Begin of the deletion isEnd of the deletion no longer Begin of the insertionbeEnd of the insertion created Begin of the insertionforEnd of the insertion Begin of the deletion onEnd of the deletion every Begin of the insertioncomment,End of the insertion Begin of the deletion comment writeEnd of the deletion and Begin of the insertioncommentEnd of the insertion Begin of the deletion aggregation is no longer overriden on commentsEnd of the deletion creation Begin of the insertionwill not override aggregation.


**Cons:**

* **Long-runningEnd of the insertion Begin of the deletion

3. Con: **Long RunningEnd of the deletion Data Begin of the insertionMigration:** Due to the sizeEnd of the insertion Begin of the deletion Migration;** Journals is oneEnd of the deletion of the Begin of the insertionJournalsEnd of the insertion Begin of the deletion largestEnd of the deletion dataset, Begin of the deletion and it&#39;s possible a dataEnd of the deletion migration Begin of the insertionmay take significant time. Adequate testing and possiblyEnd of the insertion Begin of the deletion would be time intensive- run adequate tests during implementation, consider data migration viaEnd of the deletion background jobs Begin of the insertionwill be required.End of the insertion Begin of the deletion if necessary albeit more complicated.End of the deletion

Begin of the insertion* End of the insertion Begin of the deletion 4. Con:End of the deletion **Dynamic Sorting &amp; Indexing Begin of the insertion(TBD):** Serving activities from an SQL view will require runtime sorting and possibly indexing for performance.


### Related topics

* **Authorization and Auditing:** Ensure Comments have clear ownership and audit trails, justEnd of the insertion Begin of the deletion (\*tbc)**;End of the deletion as Begin of the insertionJournals do.

* **Future-proofing:** DesignEnd of the insertion the Begin of the insertionComments model toEnd of the insertion Begin of the deletion Activities View willEnd of the deletion be Begin of the insertionextensible for features like rich-text support or threading.

* **API Consistency:** Update APIsEnd of the insertion Begin of the deletion served via an SQL view, we needEnd of the deletion to Begin of the insertionsupport the new Comments model, ensuring backward compatibility where needed.

* **Archival Strategy:** Plan for efficient archivalEnd of the insertion Begin of the deletion sortEnd of the deletion and Begin of the insertionpurging of legacy Journals once migration is complete.

* **Testing:** Develop comprehensive migration and regression tests to ensure data integrity and application stability throughout the transition.End of the insertion Begin of the deletion possibly index at runtimeEnd of the deletion