Sequelize-typescript 'HasManyCreateAssociationMixin' 不是函数答案

【问题标题】：Sequelize-typescript 'HasManyCreateAssociationMixin' is not a functionSequelize-typescript 'HasManyCreateAssociationMixin' 不是函数
【发布时间】：2020-02-04 23:27:04
【问题描述】：

我在 sequelize-typescript 中有一个模型 Door.ts：

import { Table, Model, Column, AutoIncrement, PrimaryKey, ForeignKey, DataType, AllowNull, BelongsTo, HasMany } from 'sequelize-typescript';
import { Location } from '@modules/location';
import { AkilesServiceV1, AkilesServiceV0, IDoorService } from '@services/DoorService';
import { BelongsToGetAssociationMixin } from 'sequelize/types';
import { DoorLog } from '@modules/door_log';
import { HasManyCreateAssociationMixin } from 'sequelize';

@Table({ tableName: 'door' })
class Door extends Model<Door> {
    @PrimaryKey
    @AutoIncrement
    @Column
    id!: number;

    @AllowNull(false)
    @Column
    type!: string;

    @Column
    button_id!: string;

    @Column
    gadget_id!: string;

    @Column
    action_id!: string;

    @AllowNull(false)
    @Column(DataType.ENUM('vehicular','pedestrian'))
    access_type!: 'vehicular' | 'pedestrian';

    @AllowNull(false)
    @Column
    description_tag!: string;

    @Column(DataType.VIRTUAL)
    description!: string;

    @ForeignKey(() => Location)
    @AllowNull(false)
    @Column
    location_id!: number;

    @BelongsTo(() => Location)
    location!: Location;

    @HasMany(() => DoorLog)
    door_logs!: DoorLog[];

    public getLocation!: BelongsToGetAssociationMixin<Location>;
    public createDoorLog!: HasManyCreateAssociationMixin<DoorLog>;

    public async open () {
        let doorService: IDoorService;
        switch(this.type) {
            case 'akiles-v0':
                doorService = new AkilesServiceV0();
                break;
            case 'akiles-v1':
                doorService = new AkilesServiceV1();
                break;
            default:
                doorService = new AkilesServiceV1();
                break;
        }

        //await doorService.open(this);

        return await this.createDoorLog({ door_id: this.id, timestamp: new Date() });

    }

    public async getParking() {
        const location: Location = await this.getLocation();
        return await location.getParking();
    }
}

export default Door

如你所见，它有这两个与 Mixins 相关的函数：

public getLocation!: BelongsToGetAssociationMixin<Location>;
public createDoorLog!: HasManyCreateAssociationMixin<DoorLog>;

第一个可以完美地使用它：await this.getLocation()。但是，当我这样称呼它时，第二个：await this.createDoorlog ({door_id: this.id, timestamp: new Date ()}) 返回以下错误：

TypeError: this.createDoorLog is not a function

我也尝试过不带参数调用函数，但得到了相同的结果。我不明白为什么这两个函数虽然创建的几乎相同，但行为却不同。我错过了HasManyCreateAssociationMixin 的东西吗？

谢谢。

【问题讨论】：

你找到解决方案了吗？

标签： node.js typescript sequelize.js

【解决方案1】：

因为当我不可避免地再次遇到这个问题时，对同样的问题感到困惑。答案是将“as”添加到 @HasMany mixin。 Sequelize 似乎有驼峰类的问题。

所以在这种情况下添加

@HasMany(() => DoorLog, options: {as: "doorLog" })
    door_logs!: DoorLog[];

或者类似的东西应该允许你使用这个 mixin

【讨论】：