connection error: Duplicate entry, need help!

Issue type:

[ ] question [ ] bug

Database system/driver:

[ ] mysql / mariadb

TypeORM version:

[ ] latest

Steps to reproduce or a small repository showing the problem:

before: I already have a table in MySQL, such as: ±-------------±--------------±-----±----±--------±------+ | Field | Type | Null | Key | Default | Extra | ±-------------±--------------±-----±----±--------±------+ | id | decimal(10,0) | NO | MUL | NULL | | | user_name | varchar(30) | YES | | NULL | | ±-------------±--------------±-----±----±--------±------+ tips: no primary key data: ±-------------±--------------+ | id | user_name | ±-------------±--------------+ | 0 | Owen | | 1 | Tom | ±-------------±--------------+

after: I create entry : import { Entity, PrimaryColumn, Column, Index } from “typeorm”;

@Entity() export class User { @PrimaryColumn(‘decimal’) id: number; @Column() user_name: string; }

next: connection error: TypeORM connection error: { Error: ER_DUP_ENTRY: Duplicate entry ‘0’ for key ‘PRIMARY’ at Query.Sequence._packetToError (E:\Projects\ts-server\node_modules\mysql\lib\protocol\sequences\Sequence.js:52:14) at Query.ErrorPacket (E:\Projects\ts-server\node_modules\mysql\lib\protocol\sequences\Query.js:77:18) at Protocol._parsePacket (E:\Projects\ts-server\node_modules\mysql\lib\protocol\Protocol.js:279:23) at Parser.write (E:\Projects\ts-server\node_modules\mysql\lib\protocol\Parser.js:76:12) at Protocol.write (E:\Projects\ts-server\node_modules\mysql\lib\protocol\Protocol.js:39:16) at Socket.<anonymous> (E:\Projects\ts-server\node_modules\mysql\lib\Connection.js:103:28) at emitOne (events.js:96:13) at Socket.emit (events.js:188:7) at readableAddChunk (_stream_readable.js:176:18) at Socket.Readable.push (_stream_readable.js:134:10) -------------------- at Protocol._enqueue (E:\Projects\ts-server\node_modules\mysql\lib\protocol\Protocol.js:145:48) at PoolConnection.query (E:\Projects\ts-server\node_modules\mysql\lib\Connection.js:208:25) at MysqlQueryRunner.<anonymous> (E:\Projects\ts-server\node_modules\typeorm\driver\mysql\MysqlQueryRunner.js:193:44) at step (E:\Projects\ts-server\node_modules\typeorm\driver\mysql\MysqlQueryRunner.js:42:23) at Object.next (E:\Projects\ts-server\node_modules\typeorm\driver\mysql\MysqlQueryRunner.js:23:53) at fulfilled (E:\Projects\ts-server\node_modules\typeorm\driver\mysql\MysqlQueryRunner.js:14:58) at process._tickCallback (internal/process/next_tick.js:109:7) message: ‘ER_DUP_ENTRY: Duplicate entry '0' for key 'PRIMARY'’, code: ‘ER_DUP_ENTRY’, errno: 1062, sqlMessage: ‘Duplicate entry '0' for key 'PRIMARY'’, sqlState: ‘23000’, index: 0, sql: ‘ALTER TABLE user ADD id decimal NOT NULL PRIMARY KEY’, name: ‘QueryFailedError’, query: ‘ALTER TABLE user ADD id decimal NOT NULL PRIMARY KEY’, parameters: [] }

How to resolve? Thanks!

[pleerock]

Probably you need to ask yourself what does ER_DUP_ENTRY: Duplicate entry '0' for key 'PRIMARY' sql error mean. This place isn’t for such questions.

[lemadane]

experienced this in repo.create(<multiple instance>)