javascript - 如何避免对同时包含外键和包含对象的 JS 关联进行 Sequelize

如何避免通过包含显示 sequelize 创建的外键和急切获取的对象？

我有以下模型结构:

表格输入:

所有者:用户

createdBy: 用户

修改者:用户

formEntryData: [FormEntryData]

我在阅读了 SequelizeJS 文档后对其进行了建模，并提出了以下内容:

const User = sequelize.define('user', {
    id: {
        type: Sequelize.BIGINT(20),
        field: 'user_id',
        primaryKey: true
    },
    emailAddress: {
        type: Sequelize.STRING(256),
        field: 'email_address'
    }
}, {
    tableName: 'users',
    timestamps: false
});

const FormEntryData = sequelize.define('formEntryData', {
    id: {
        type: Sequelize.BIGINT(20),
        field: 'id',
        primaryKey: true
    },
    entryId: {
        type: Sequelize.BIGINT(20),
        field: 'entry_id'
    },
    ...
}, {
    tableName: 'formEntryData',
    timestamps: false
});

const FormEntry = sequelize.define('formEntry', {
    id: {
        type: Sequelize.BIGINT(20),
        field: 'entry_id',
        primaryKey: true
    },
    ...
}, {
    tableName: 'formEntries',
    timestamps: false
});

然后我需要创建关联来将模型联系在一起，经过大量的反复试验，我想出了以下内容:

FormEntry.hasMany(FormEntryData, {foreignKey: 'entry_id', as: 'FormEntryData'});
FormEntry.belongsTo(User, {foreignKey: 'created_by', as: 'CreatedBy'});
FormEntry.belongsTo(User, {foreignKey: 'modified_by', as: 'ModifiedBy'});
FormEntry.belongsTo(User, {foreignKey: 'owner', as: 'Owner'});

然后，我可以通过执行以下操作来查询数据:

FormEntry.findByPrimary(1472280, {
    include: [
        {
            model: FormEntryData,
            as: "FormEntryData"
        },
        {
            model: User,
            as: "CreatedBy"
        },
        {
            model: User,
            as: "Owner"
        },
        {
            model: User,
            as: "ModifiedBy"
        }
    ]
})

不幸的是，我的结果似乎有点重复，因为它似乎同时包括外键和急切获取的对象。

{
    "id": 1472280,
    ...
    "created_by": 26508,  <-- repetitive (don't want this)
    "modified_by": 26508, <-- repetitive (don't want this)
    "owner": null,        <-- repetitive (don't want this)
    "FormEntryData": [
        {
            "id": 27164476,
            "entryId": 1472280, <-- repetitive (but I want this one)
            ...
            "entry_id": 1472280 <-- repetitive (don't want this)
        },
        ...
    ],
    "CreatedBy": {        <-- repetitive (but I want this one)
        "id": 26508,
        "emailAddress": "[e-mail]"
    },
    "Owner": null,        <-- repetitive (but I want this one)
    "ModifiedBy": {       <-- repetitive (but I want this one)
        "id": 26508,
        "emailAddress": "[e-mail]"
    }
}

最佳答案

您需要从查询中排除特定字段

FormEntry.findByPrimary(1472280, {
    include: [
        {
            model: FormEntryData,
            as: "FormEntryData",
            attributes: { exclude: ['entry_id'] }
        },
        {
            model: User,
            as: "CreatedBy"
        },
        {
            model: User,
            as: "Owner"
        },
        {
            model: User,
            as: "ModifiedBy"
        }
    ],
    attributes: { exclude: ['owner', 'created_by', 'modified_by'] }
})

关于javascript - 如何避免对同时包含外键和包含对象的 JS 关联进行 Sequelize，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/42543964/