Sequelize hasOne Relationship association方法不是函数吗？

我正在使用Node和Sequelize ORM的后端。 正在使用的数据库是PostgreSQL。 我之前在代码中使用了hasOne() ，并且它非常createAssociation() ，之前使用hasOne()关系的所有createAssociation() ， getAssociation()方法hasOne()工作。 然而，由于某种原因，现在给我一个问题。

index.js

 const Connection = new Sequelize( 'postgres', 'postgres', null, { dialect: 'postgres', host: '192.168.99.100', port: '5432', } ); const ModelSeven = Connection.define('modelSeven', ModelSevenSchema), ModelFive = Connection.define('modelFive', ModelFiveSchema), ModelOne = Connection.define('modelOne', ModelOneSchema), ModelSix = Connection.define('modelSix', ModelSixSchema), ModelThree = Connection.define('modelThree', ModelThreeSchema), ModelFour = Connection.define('modelFour', ModelFourSchema), ModelOne.hasOne(ModelThree); // Defines hasOne() relationship ModelOne.hasOne(ModelFour); // Defines hasOne() relationship ModelSix.belongsToMany(ModelOne, {through: 'Pivot'}); ModelOne.belongsToMany(ModelSix, {through: 'Pivot' }); ModelOne.belongsTo(ModelSeven); ModelThree.hasMany(ModelFive); ModelFour.hasMany(ModelFive); export default Connection; 

utilize.js

 import DB from './somePathToIndex.js'; //GraphQL resolve function async resolve (root, args, context) { //creates ModelOne var ModelOne = await DB.models.ModelOne.create({ value: args.value, valueTwo: args.valueTwo }); // attempts to createModelThree/createModelFour from hasOne() relationship var ModelThree = await ModelOne.createModelThree({}); var ModelFour = await ModelOne.createModelFour({}); // Maps through value array finding the modelFive with and id and adding // it to modelThree via hasMany() relationship args.value.map(async (id, key) => { var ModelFive = await DB.models.ModelFive.findAll({ where: { id: id } }); await ModelThree.addModelFive(ModelFive); }); // Maps through value array finding the modelFive with and id and adding // it to modelFour via hasMany() relationship args.valueTwo.map(async (id, key) => { var ModelFive = await DB.models.ModelFive.findAll({ where: { id: id } }); await ModelFour.addModelFive(ModelFive); }); return ModelOne; } 

问题是当节点到达这一行时：

  var ModelThree = await ModelOne.createModelThree({}); var ModelFour = await ModelOne.createModelFour({}); 

给我以下错误：

 "errors": [ { "message": "ModelOne.createModelThree is not a function", "locations": [ { "line": 38, "column": 3 } ] } ] 

这个错误是说hasOne()关系方法create[Association]()不是一个函数。 我真的不知道这是为什么。 如果你知道为什么请让我知道。