使用 Sequelize 在父对象中查找子对象答案

【问题标题】：Find Child Object in Parent Object using Sequelize使用 Sequelize 在父对象中查找子对象
【发布时间】：2020-06-29 08:30:00
【问题描述】：

我在 MySQL 数据库中有三个表：- categoryTypes、categories 和 categoryTemplates。父表是 categoryTypes。在 categoryTypes 中，有以下字段，categoryTypes 的 id 作为外键存储在 categories 表中。虚拟数据如下：-

"id": 1,
"name": "testing1",
"img": "assets/images/img-1584341288506.png",
"status": "ACTIVE",

在categories表中，有以下字段，其中有一个字段名为categoryTypeRef，其中categoryTypes的主键存储为外键。虚拟数据：-

"id": 1,
"name": "testing1236",
"img": "assets/images/img-1584341317490.png",
"status": "ACTIVE",
"categoryTypeRef": 1,

在categoryTemplates表中，category id作为外键存储在category templates表中，虚拟数据为：-

"id": 2,
"status": "ACTIVE",
"brandName": "Havells",
"purchasingCost": 10000,
"specifications": "{\n  \"TextBox\": [\n    {\n      \"labelText\": \"Text Box 1\",\n      \"valueText\": \"1234577800\",\n      \"requireTextBox\": false\n    },\n    {\n      \"labelText\": \"Text Box 2\",\n      \"valueText\": \"15264848\",\n      \"requireTextBox\": false\n    }\n  ],\n  \"TextArea\": [\n    {\n      \"labelTextArea\": \"bdbhd\",\n      \"valueTextArea\": \"hdhdhd\",\n      \"requireTextArea\": false\n    }\n  ]\n}",
"serialNo": null,
"warrantyMonths": 18,
"categoryRef": 1,

我想在获取类别模板对象时检索类别类型作为不同的对象。 我的预期解决方案是：-

"categoryTemplate": {
            "id": 2,
            "status": "ACTIVE",
            "brandName": "Havells",
            "purchasingCost": 10000,
            "specifications": "{\n  \"TextBox\": [\n    {\n      \"labelText\": \"Text Box 1\",\n      \"valueText\": \"1234577800\",\n      \"requireTextBox\": false\n    },\n    {\n      \"labelText\": \"Text Box 2\",\n      \"valueText\": \"15264848\",\n      \"requireTextBox\": false\n    }\n  ],\n  \"TextArea\": [\n    {\n      \"labelTextArea\": \"bdbhd\",\n      \"valueTextArea\": \"hdhdhd\",\n      \"requireTextArea\": false\n    }\n  ]\n}",
            "serialNo": null,
            "warrantyMonths": 18,
            "categoryRef": 1,
            "category": {
                "id": 1,
                "name": "testing1236",
                "img": "assets/images/img-1584341317490.png",
                "status": "ACTIVE",
                "categoryTypeRef": 1,
            },
           "categoryType": {
                    "id": 1,
                    "name": "testing1",
                    "img": "assets/images/img-1584341288506.png",
                    "status": "ACTIVE",
                }
        }

我应用了以下 sequelize 查询：-

 const categoryTemplate = await CategoryTemplate.findAll({
            where: {
              id: body.categoryTemplateRef
            },
            include: [
              {
                model: Category,
                include: [CategoryType]
              }
            ]
          });

我的实际结果是：-

"categoryTemplate": {
            "id": 2,
            "status": "ACTIVE",
            "brandName": "Havells",
            "purchasingCost": 10000,
            "specifications": "{\n  \"TextBox\": [\n    {\n      \"labelText\": \"Text Box 1\",\n      \"valueText\": \"1234577800\",\n      \"requireTextBox\": false\n    },\n    {\n      \"labelText\": \"Text Box 2\",\n      \"valueText\": \"15264848\",\n      \"requireTextBox\": false\n    }\n  ],\n  \"TextArea\": [\n    {\n      \"labelTextArea\": \"bdbhd\",\n      \"valueTextArea\": \"hdhdhd\",\n      \"requireTextArea\": false\n    }\n  ]\n}",
            "serialNo": null,
            "warrantyMonths": 18,
            "categoryRef": 1,
            "category": {
                "id": 1,
                "name": "testing1236",
                "img": "assets/images/img-1584341317490.png",
                "status": "ACTIVE",
                "categoryTypeRef": 1,
                "categoryType": {
                    "id": 1,
                    "name": "testing1",
                    "img": "assets/images/img-1584341288506.png",
                    "status": "ACTIVE",
                }
            }
        }

如果有人对此提供帮助，请提前致谢。

【问题讨论】：

标签： mysql node.js database sequelize.js

【解决方案1】：

categoryTemplate.categoryType = categoryTemplate.category.categoryType

这意味着在您的对象 categoryTemplate 上创建一个名为 categoryType 的新字段，并在其上存储对象 categoryTemplate.category.categoryType

【讨论】：

对不起，我没有得到你。你能描述一下吗？