javascript - 类型 ORM QueryFailedError PostgreSQL

Question

在添加与库存实体具有 ManyToOne 关系的新 Item 实体后运行测试服务器时，我遇到了问题。在 PGAdmin4 中，显示的 Item 表在与我的 Inventory 表进行比较时看起来是正确的，所以我不完全确定 bug splat 所在的位置，但是当尝试执行我的 get/seed 时，这两个表都没有任何数据输出app.controller.ts.

查看终端报错信息，查找错误码42P01，发现是未定义的表。

提前感谢所有帮助!

Inventory.ts

import { BaseEntity } from "typeorm/repository/BaseEntity";
import {Entity, PrimaryGeneratedColumn, Column, OneToOne, OneToMany} from "typeorm";
import {Player} from "./Player";
import {Item} from "./Item";

@Entity()
export class Inventory{

    @PrimaryGeneratedColumn()
    id: number;

    @Column("varchar", { length: 200 })
    name: string;

    @OneToOne(type => Player, player => player.inventory)
    player: Player;

    @OneToMany(type => Item, item => item.inventory)
    items: Item[];
}

项目.ts

import { BaseEntity } from "typeorm/repository/BaseEntity";
import {Entity, PrimaryGeneratedColumn, Column, ManyToOne} from "typeorm";
import { Inventory } from "./Inventory";

@Entity()
export class Item{ 

    @PrimaryGeneratedColumn()
    id: number;

    @Column("varchar", { length: 200 })
    name: string;

    @ManyToOne(type => Inventory, inventory => inventory.items)
    inventory: Inventory;

}

终端错误信息

{ QueryFailedError: relation "public.item_id_seq" does not exist
    at new QueryFailedError (C:\Users\JYUN3\Desktop\Projects\NativeScript\mygame\svc\src\error\QueryFailedError.ts:7:9)
    at Query.callback (C:\Users\JYUN3\Desktop\Projects\NativeScript\mygame\svc\src\driver\postgres\PostgresQueryRunner.ts:216:26)
    at Query.handleError (C:\Users\JYUN3\Desktop\Projects\NativeScript\mygame\svc\node_modules\pg\lib\query.js:143:17)
    at Connection.connectedErrorHandler (C:\Users\JYUN3\Desktop\Projects\NativeScript\mygame\svc\node_modules\pg\lib\client.js:132:26)
    at Connection.emit (events.js:160:13)
    at Socket.<anonymous> (C:\Users\JYUN3\Desktop\Projects\NativeScript\mygame\svc\node_modules\pg\lib\connection.js:117:12)
    at Socket.emit (events.js:160:13)
    at addChunk (_stream_readable.js:269:12)
    at readableAddChunk (_stream_readable.js:256:11)
    at Socket.Readable.push (_stream_readable.js:213:10)
  message: 'relation "public.item_id_seq" does not exist',
  name: 'QueryFailedError',
  length: 116,
  severity: 'ERROR',
  code: '42P01',
  detail: undefined,
  hint: undefined,
  position: undefined,
  internalPosition: undefined,
  internalQuery: undefined,
  where: undefined,
  schema: undefined,
  table: undefined,
  column: undefined,
  dataType: undefined,
  constraint: undefined,
  file: 'namespace.c',
  line: '406',
  routine: 'RangeVarGetRelidExtended',
  query: 'ALTER TABLE "public"."item" ALTER COLUMN "id" SET DEFAULT nextval(\'"public.item_id_seq"\')',
  parameters: [] }

应用程序 Controller .ts

import { Get, Controller, Param } from '@nestjs/common';
import { Spell } from './entity/Spell';
import { Player } from './entity/Player';
import { Inventory } from './entity/Inventory';
import { Item } from './entity/Item';
import { createConnection } from 'typeorm';

  @Get('seed')
  seed(): void {
    createConnection().then(async connection => {
    const player1 = new Player();
    player1.name = "TestSubject"
    player1.health = 20;
    player1.mana = 20;
    player1.currentRing = 1;
    player1.currentZone = 2;
    player1.currentRoom = 2;

    
    const spell1 = new Spell();
    spell1.name = "Fire";
    spell1.damage = 5;
    spell1.mana = 5;
    spell1.player = player1;
    await connection.manager.save(spell1);

    //loading spells into player
    player1.spells = [];
    player1.spells.push(spell1);

    const item1 = new Item();
    item1.name = "sword";
    await connection.manager.save(item1);
    
    const inventory = new Inventory();
    inventory.name = "my items";
    inventory.player = player1;
    await connection.manager.save(inventory);

    player1.inventory.items = [];
    player1.inventory.items.push(item1);

    await connection.manager.save(player1);

    
  }).catch(error => console.log(error));
}

Answer 1

您可能会收到此错误，因为您的模式与您的实体不同步

尝试改变 ormconfig.json 中的 “synchronize: true”，
此选项用于使模式与数据库保持同步。

仅在开发/调试中使用此选项。

https://github.com/typeorm/typeorm/blob/master/docs/faq.md#how-do-i-update-a-database-schema

有关连接选项的更多信息: https://typeorm.io/#/connection-options/common-connection-options