Question

我遇到了一个问题，我试图关联两个具有一对多关系的模型。出于某种原因，尽管引用了这种关系，但这个查询仍会抛出错误。

这是我的错误消息：

Unhandled rejection TypeError: Cannot read property 'getTableName' of undefined
    at generateJoinQueries (/Users/user/Desktop/Projects/node/project/node_modules/sequelize/lib/dialects/abstract/query-generator.js:1181:43)

这是路线：

appRoutes.route('/settings')

    .get(function(req, res, organization){
        models.DiscoverySource.findAll({
            where: { 
                organizationId: req.user.organizationId
            },
            include: [{
                model: models.Organization, through: { attributes: ['organizationName', 'admin', 'discoverySource']}
            }]
        }).then(function(organization, discoverySource){
            res.render('pages/app/settings.hbs',{
                organization: organization,
                discoverySource: discoverySource
            });
        })

    });

DiscoverySource：

module.exports = function(sequelize, DataTypes) {

var DiscoverySource = sequelize.define('discovery_source', {
    discoverySourceId: {
        type: DataTypes.INTEGER,
        field: 'discovery_source_id',
        autoIncrement: true,
        primaryKey: true
    },
    discoverySource: {
        type: DataTypes.STRING,
        field: 'discovery_source_name'
    },
    organizationId: {
        type: DataTypes.TEXT,
        field: 'organization_id'
    },
},{
    freezeTableName: true,
    classMethods: {
        associate: function(db) {
            DiscoverySource.belongsTo(db.Organization, {foreignKey: 'organization_id'});
        },
    },
});
    return DiscoverySource;
}

组织：

module.exports = function(sequelize, DataTypes) {

var Organization = sequelize.define('organization', {
    organizationId: {
        type: DataTypes.INTEGER,
        field: 'organization_id',
        autoIncrement: true,
        primaryKey: true
    },
    organizationName: {
        type: DataTypes.STRING,
        field: 'organization_name'
    },
    admin: DataTypes.STRING
},{
    freezeTableName: true,
    classMethods: {
        associate: function(db) {
            Organization.hasMany(db.DiscoverySource, {foreignKey: 'organization_id'});
        },
    }
});
    return Organization;
}

Answer 1

看起来，这是Sequelize Association Error Cannot read property 'getTableName' of undefined的副本。

但是，您需要将查询重写为：

models.DiscoverySource.findAll({
    attributes: ['discoverySource'],
    where: { 
        organizationId: req.user.organizationId
    },
    include: [{
        model: models.Organization,
        attributes: ['organizationName', 'admin']
    }]
})

根据Sequelize文档：

[options.attributes] - 要选择的属性列表，或包含include和exclude键的对象。

[options.include []。attributes] - 要从子模型中选择的属性列表。

[options.include []。through.where] - 过滤关于belongsToMany关系的连接模型。

[options.include []。through.attributes] - 要从belongsToMany关系的连接模型中选择的属性列表。

因此，[options.include[].through]只能用于Belongs-To-Many关联而不是Belong-To用于DiscoverySource和Organization模型的情况。

SequelizeJS无法读取undefined的属性'getTableName'

1 个答案: