通过附加到 SQLite 上的现有数组来更新 Sequelize 列

Question

我有一个模型看起来像

import {Optional, Model, Sequelize, DataTypes } from 'sequelize';

/*This is the Product model used to save the data about products*/
export interface ProductAttributes {
    productId: number;
    title: string;
    userName: string;
    sellerReview: string;
}

export interface ProductCreationAttributes extends Optional<ProductAttributes, 'productId'> { }

export class Product extends Model<ProductAttributes, ProductCreationAttributes> implements ProductAttributes {
    productId!: number;
    title!: string;
    userName!: string;
    sellerReview: string;

    public static initialize(sequelize: Sequelize) {
        Product.init({
            productId: {
                type: DataTypes.INTEGER,
                autoIncrement: true,
                primaryKey: true,
            },
            title: {
                type: DataTypes.STRING,
                allowNull: false
            },
            userName: {
                type: DataTypes.STRING,
                allowNull: false
            },
            sellerReview: {
                type: DataTypes.STRING,
                get: function () {
                    return JSON.parse(this.getDataValue('sellerReview'));
                },
                set: function (val) {
                    return this.setDataValue('sellerReview', JSON.stringify(val));
                }
            }
        },
            {
                sequelize,
                tableName: 'products'
            }
        );
    }
}

我有一个控制器，我将从中插入值并将值更新到模型中，如下所示：

import express from 'express';
import { Router, Request, Response, RequestHandler } from 'express';
import { Product } from '../models/product.model';
import { Readable } from 'stream';
import { Sequelize, where } from 'sequelize';

/**
 * This method is to add new products/services to the products model.
 */
productController.post('/add',
    (req: Request, res: Response) => {
        Product.create(req.body)
        .then(product_added => res.send(product_added))
        .catch(err => res.status(500).send(err));
    });

/**
 * This method is to edit a product in the products model.
 */
productController.put('/edit/:id', (req: Request, res: Response) => {
    Product.findByPk(req.params.id)
        .then(found => {
            if (found != null) {
                found.update(req.body).then(() => {
                    res.status(200).send('Product updated successfully.');
                });
            } else {
                res.status(404).send('Product not found.');
            }
        })
        .catch(err => res.status(500).send(err));
    });
    productController.put('/addNewReview/:id', (req: Request, res: Response) => {
        Product.findByPk(req.params.id)
            .then(found => {
                if (found != null) {
                    found.update(
                        {sellerReview: Sequelize.literal( req.body.sellerReview)},
                        {where: {productId: req.params.id}}
                    ).then(() => {
                        res.status(200).send('Riview added successfully.');
                    });
                } else {
                    res.status(404).send('Product not found.');
                }
            })
            .catch(err => res.status(500).send(err));
        });
export const ProductController: Router = productController;

我想通过将新评论连接到 'sellerReview' 列的现有值来更新该行。例如：现有列是 ["review1", "review2", "review3"]. 当我更新它以添加 ["review4"] 时，我希望它是 ["review1", "review2", "review3", "review4"].

创建新行的输入如下：

{
"title": "product1",
"userName": "user1",
"sellerReview": ["review1", "review2", "review3"]

}

待更新，

{
"title": "product1",
"userName": "user1",
"sellerReview": ["review4"]

}

使用 'Sequelize.literal' 对我不起作用。有人可以帮我解决这个问题吗？

提前致谢！！

Answer 1

因为您对 sellerReview 字段使用 setter 和 getter，所以您不能使用 Sequelize.literal 或 Sequelize.fn。

所以您可以从 found 中获取 sellerReview 的现有值并将其与新值组合，如下所示：

found.update({sellerReview: found.sellerReview.concat(req.body.sellerReview)}, { where: {productId: req.params.id}})

通过附加到 SQLite 上的现有数组来更新 Sequelize 列

Update Sequelize column with appending to the existing array on SQLite

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