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Incremental migration does not configure existing PK column to enable auto-generated values

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#381 11 則留言 0 個 reaction 已指派 0 人 在 GitHub 檢視

還沒有人認領這個 Issue。

評估

難度
3/5
預估耗時
1-2 天
新手友好度
45/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
javascript, node.js, postgresql
領域
backend, database

研究方向

使用連結的 postgres-pk-auto-gen 分支及其兩個提交,在 loopback-next todo 應用程式中重現此問題。在啟用 generated: true 前後執行 npm migrate,然後確認建立不含 ID 的 todo 是否成功,以及 ID 是否會自動產生。

由索引模型根據 Issue 內容生成。

描述

feature help wanted major

Description/Steps to reproduce

From my testing using LoopBack 4 and this connector, the migration performed by npm run migrate does not configure the id (primary key) column to be auto-generated when generated: true is enabled on the property.

Link to reproduction sandbox

I've set up a branch on my loopback-next fork with a recreate. The branch is here:

https://github.com/aharbis/loopback-next/tree/postgres-pk-auto-gen

The recreate uses the todo application. There are two commits on the branch:

https://github.com/aharbis/loopback-next/commit/cdee3cb60305a02e5e1e5a49069e043079615289 - Adds the Postgres data source
https://github.com/aharbis/loopback-next/commit/43368cc4687521f06a79102b6484494cda6e27be - Sets generated: true on todo model

Steps to recreate

  1. Checkout first commit (that adds the datasource)
  2. Install dependencies (npm i)
  3. Run migration (npm run migrate)
  4. Start app (npm start)
  5. Try to create todo with ID, to confirm this works
  6. Stop app
  7. Checkout second commit (that sets generated: true)
  8. Run migration (npm run migrate)
  9. Start app (npm start)
  10. Try to create todo without ID

Expected result

In step 10, this create should succeed and the ID should be auto-generated.

Actual result

In step 10, this create yields a 500 error:

Unhandled error in POST /todos: 500 error: null value in column "id" violates not-null constraint
    at Connection.parseE (/Users/aharbis/git/loopback-next/examples/todo/node_modules/pg/lib/connection.js:602:11)
    at Connection.parseMessage (/Users/aharbis/git/loopback-next/examples/todo/node_modules/pg/lib/connection.js:399:19)
    at Socket.<anonymous> (/Users/aharbis/git/loopback-next/examples/todo/node_modules/pg/lib/connection.js:121:22)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at Socket.Readable.push (_stream_readable.js:208:10)
    at TCP.onread (net.js:601:20)

Additional information

$ node -e 'console.log(process.platform, process.arch, process.versions.node)'
darwin x64 8.12.0

$ npm ls --prod --depth 0 | grep loopback
@loopback/[email protected] /Users/aharbis/git/loopback-next/examples/todo
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── [email protected]
└── [email protected]

$ psql --version
psql (PostgreSQL) 10.5
主要語言
JavaScript
星號
118
分支
182
平均合併
5 天 4 小時
30 天內合併 PR
7

環境準備

從這裡開始

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  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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