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Node.js 用'；它不是Sequelize.Model的子类

node.js express sequelize.js

Node.js 用'；它不是Sequelize.Model的子类,node.js,express,sequelize.js,Node.js,Express,Sequelize.js,当我在我的模型中添加Sequelize的关联时，我遇到了一个错误“…调用的东西不是Sequelize.Model的子类”，我调用的不是Sequelize模型 E:...\Projects\WebApps\hr1\hr1\node_modules\sequelize\lib\associations\mixin.js:81 throw new Error(this.name + '.' + Utils.lowercaseFirst(Type.toString()) + ' called

当我在我的模型中添加Sequelize的关联时，我遇到了一个错误“…调用的东西不是Sequelize.Model的子类”，我调用的不是Sequelize模型

E:...\Projects\WebApps\hr1\hr1\node_modules\sequelize\lib\associations\mixin.js:81
      throw new Error(this.name + '.' + Utils.lowercaseFirst(Type.toString()) + ' called with something that\'s not a subclass of Sequelize.Model');
      ^

Error: user_employee_tm.class BelongsTo extends Association {
  constructor(source, target, options) {
    super(source, target, options);

    this.associationType = 'BelongsTo';
    this.isSingleAssociation = true;
    this.foreignKeyAttribute = {};

    if (this.as) {
      this.isAliased = true;
      this.options.name = {
        singular: this.as
      };
    } else {
      this.as = this.target.options.name.singular;
      this.options.name = this.target.options.name;
    }

    if (_.isObject(this.options.foreignKey)) {
      this.foreignKeyAttribute = this.options.foreignKey;
      this.foreignKey = this.foreignKeyAttribute.name || this.foreignKeyAttribute.fieldName;
    } else if (this.options.foreignKey) {
      this.foreignKey = this.options.foreignKey;
    }

    if (!this.foreignKey) {
      this.foreignKey = Utils.camelizeIf(
        [
          Utils.underscoredIf(this.as, this.source.options.underscored),
          this.target.primaryKeyAttribute
        ].join('_'),
        !this.source.options.underscored
      );
    }

    this.identifier = this.foreignKey;

    if (this.source.rawAttributes[this.identifier]) {
      this.identifierField = this.source.rawAttributes[this.identifier].field || this.identifier;
    }

    this.targetKey = this.options.targetKey || this.target.primaryKeyAttribute;
    this.targetKeyField = this.target.rawAttributes[this.targetKey].field || this.targetKey;
    this.targetKeyIsPrimary = this.targetKey === this.target.primaryKeyAttribute;

    this.targetIdentifier = this.targetKey;
    this.associationAccessor = this.as;
    this.options.useHooks = options.useHooks;

    // Get singular name, trying to uppercase the first letter, unless the model forbids it
    const singular = Utils.uppercaseFirst(this.options.name.singular);

    this.accessors = {
      get: 'get' + singular,
      set: 'set' + singular,
      create: 'create' + singular
    };
  }

  // the id is in the source table
  injectAttributes() {
    const newAttributes = {};

    newAttributes[this.foreignKey] = _.defaults({}, this.foreignKeyAttribute, {
      type: this.options.keyType || this.target.rawAttributes[this.targetKey].type,
      allowNull: true
    });

    if (this.options.constraints !== false) {
      const source = this.source.rawAttributes[this.foreignKey] || newAttributes[this.foreignKey];
      this.options.onDelete = this.options.onDelete || (source.allowNull ? 'SET NULL' : 'NO ACTION');
      this.options.onUpdate = this.options.onUpdate || 'CASCADE';
    }

    Helpers.addForeignKeyConstraints(newAttributes[this.foreignKey], this.target, this.source, this.options, this.targetKeyField);
    Utils.mergeDefaults(this.source.rawAttributes, newAttributes);

    this.identifierField = this.source.rawAttributes[this.foreignKey].field || this.foreignKey;

    this.source.refreshAttributes();

    Helpers.checkNamingCollision(this);

    return this;
  }

  mixin(obj) {
    const methods = ['get', 'set', 'create'];

    Helpers.mixinMethods(this, obj, methods);
  }

  /**
   * Get the associated instance.
   *
   * @param {Object} [options]
   * @param {String|Boolean} [options.scope] Apply a scope on the related model, or remove its default scope by passing false.
   * @param {String} [options.schema] Apply a schema on the related model
   * @see {@link Model.findOne} for a full explanation of options
   * @return {Promise<Model>}
   */
  get(instances, options) {
    const association = this;
    const where = {};
    let Target = association.target;
    let instance;

    options = Utils.cloneDeep(options);

    if (options.hasOwnProperty('scope')) {
      if (!options.scope) {
        Target = Target.unscoped();
      } else {
        Target = Target.scope(options.scope);
      }
    }

    if (options.hasOwnProperty('schema')) {
      Target = Target.schema(options.schema, options.schemaDelimiter);
    }

    if (!Array.isArray(instances)) {
      instance = instances;
      instances = undefined;
    }

    if (instances) {
      where[association.targetKey] = {
        [Op.in]: instances.map(instance => instance.get(association.foreignKey))
      };
    } else {
      if (association.targetKeyIsPrimary && !options.where) {
        return Target.findByPk(instance.get(association.foreignKey), options);
      } else {
        where[association.targetKey] = instance.get(association.foreignKey);
        options.limit = null;
      }
    }

    options.where = options.where ?
      {[Op.and]: [where, options.where]} :
      where;

    if (instances) {
      return Target.findAll(options).then(results => {
        const result = {};
        for (const instance of instances) {
          result[instance.get(association.foreignKey, {raw: true})] = null;
        }

        for (const instance of results) {
          result[instance.get(association.targetKey, {raw: true})] = instance;
        }

        return result;
      });
    }

    return Target.findOne(options);
  }

  /**
   * Set the associated model.
   *
   * @param {Model|String|Number} [newAssociation] An persisted instance or the primary key of an instance to associate with this. Pass `null` or `undefined` to remove the association.
   * @param {Object} [options] Options passed to `this.save`
   * @param {Boolean} [options.save=true] Skip saving this after setting the foreign key if false.
   * @return {Promise}
   */
  set(sourceInstance, associatedInstance, options) {
    const association = this;

    options = options || {};

    let value = associatedInstance;
    if (associatedInstance instanceof association.target) {
      value = associatedInstance[association.targetKey];
    }

    sourceInstance.set(association.foreignKey, value);

    if (options.save === false) return;

    options = _.extend({
      fields: [association.foreignKey],
      allowNull: [association.foreignKey],
      association: true
    }, options);

    // passes the changed field to save, so only that field get updated.
    return sourceInstance.save(options);
  }

  /**
   * Create a new instance of the associated model and associate it with this.
   *
   * @param {Object} [values]
   * @param {Object} [options] Options passed to `target.create` and setAssociation.
   * @see {@link Model#create}  for a full explanation of options
   * @return {Promise}
   */
  create(sourceInstance, values, fieldsOrOptions) {
    const association = this;

    const options = {};

    if ((fieldsOrOptions || {}).transaction instanceof Transaction) {
      options.transaction = fieldsOrOptions.transaction;
    }
    options.logging = (fieldsOrOptions || {}).logging;

    return association.target.create(values, fieldsOrOptions).then(newAssociatedObject =>
      sourceInstance[association.accessors.set](newAssociatedObject, options)
    );
  }
} called with something that's not a subclass of Sequelize.Model
    at Function.<anonymous> (E:...\Projects\WebApps\hr1\hr1\node_modules\sequelize\lib\associations\mixin.js:81:13)
    at Object.<anonymous> (E:...\Projects\WebApps\hr1\hr1\models\user_employee.js:22:14)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)
    at Module.require (internal/modules/cjs/loader.js:636:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (E:...\Projects\WebApps\hr1\hr1\models\user.js:4:26)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)
    at Module.require (internal/modules/cjs/loader.js:636:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (E:...\Projects\WebApps\hr1\hr1\routes\index.js:4:12)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
模型/用户_employee.js

const sequelize = require('../config/connectionDatabase');
var Sequelize = require('sequelize');
const User = require('../models/user');

var UserEmployee = sequelize.define('user_employee_tm', {
    DateJoin: {
        type: Sequelize.DATE
    },
    UserID: {
        type: Sequelize.INTEGER,
        references: {
            model: User,
            key: "ID"
        }
    },
    CompanyID: {
        type: Sequelize.INTEGER
    }
});

// UserEmployee.hasOne(User, {as: 'User', foreignKey: 'UserID'});  
UserEmployee.belongsTo(User , {foreignKey: 'ID', as: 'Employee'});
module.exports = UserEmployee;
有什么我错过的吗？我已尝试使用此url

用于随模型添加Associate，但仍然存在相同的问题

非常感谢您的帮助

您需要在名为
associate（models）
的函数中添加关联。
models
参数包含由定义名称键入的所有现有
Model
定义（本例中为“user_tm”）

我发现我只需要定义UserEmployee的对象 这是我修复的代码

const sequelize = require('../config/connectionDatabase');
var Sequelize = require('sequelize');
const User = require('../models/user');
const Company = require('../models/company');

var UserEmployee = sequelize.define('user_employee_tm', {
    DateJoin: {
        type: Sequelize.DATE
    },
    UserID: {
        type: Sequelize.INTEGER,
        references: {
            model: User,
            key: "UserID"
        }
    },
    CompanyID: {
        type: Sequelize.INTEGER,
        references: {
            model: Company,
            key: "CompanyID"
        }
    }
});
UserEmployee.belongsTo(Company, {as: 'Company', foreignKey: 'CompanyID'});
UserEmployee.belongsTo(User, {as: 'User', foreignKey: 'UserID'});
module.exports = UserEmployee;
不需要设置为associate，因为Sequelize已经设置了关联它们的方法，并且我还修复了它们之间的关系

希望其他和我有同样问题的人能照顾好它，不要让2个模型变成1个文件

附言。
感谢doublesharp帮助我指出我的错误行为

仅针对未来的谷歌用户，这也可能发生在看似正确的代码上，但存在循环依赖关系。在我的例子中，A与B有一个belongsTo关系，当我在B处添加一个钩子来实例化A时，出现了错误（事实上，当您添加
导入时出现了错误）

我通过在一个文件中添加钩子来修复它。


A.hasOne（B）

和

B.belongsTo（A）
在同一个文件中为我解决了这个问题

我发现问题，我忘记从型号名称中删除s

User.belongstomy（models.Roles{
通过：“用户角色”，

});
我就是这样解决的：A.有很多（模型B）；在A模型上，然后在B模型上B.belongsTo（模型A）



“严格使用”；
const{Model}=require（“sequelize”）；
常数报价=要求（“/报价”）；
module.exports=（sequelize，数据类型）=>{
类客户机扩展模型{
/**
*用于定义关联的助手方法。
*此方法不是Sequelize生命周期的一部分。
*`models/index`文件将自动调用此方法。
*/
静态助理（模型）{
//在这里定义关联
客户.hasOne（型号.报价）；
}
}
Clients.init(
{
名字：DataTypes.STRING，
lastName:DataTypes.STRING，
电子邮件：DataTypes.STRING，
电话：DataTypes.STRING，
contactName:DataTypes.STRING，
contactPosition:DataTypes.STRING，
rncCode:DataTypes.STRING，
活动：DataTypes.BOOLEAN，
},
{
续集，
型号名称：“客户机”，
}
);
返回客户；

};如果有很多模型，将所有模型放在一个文件中是不可行的

对我来说，有效的方法不是将模型添加到同一个文件中，而是创建一个新的
关联
文件并导入模型，然后在其中执行
下面的操作。然后在主应用程序文件中导入“/assocations”
。这解决了错误


associations
文件应该是这样的：


import {Post} from "./post";
import {Tag} from "./tag";

Tag.belongsToMany(Post, {
    through: 'PostTags'
})

Post.belongsToMany(Tag, {
    through: 'PostTags'
})



我是新来续集的。这种方法可能很幼稚，但它解决了我的简单用例中的鸡/蛋问题：

models/Dog.js


const{Model}=require（'sequelize'）；
module.exports=函数（sequelize）{
类狗扩展模型{}
设置超时（（）=>{
狗。有很多（续集。模型。跳蚤）；
}, 0);
返回犬；
}


models/flear.js


const{Model}=require（'sequelize'）；
module.exports=函数（sequelize）{
类跳蚤扩展模型{}
设置超时（（）=>{
跳蚤（sequelize.models.Dog）；
}, 0);
返蚤；
}


models/index.js：


const sequelize=getConnectionSomehow（）；
const Dog=require（'./Dog'）（续集）；
常量跳蚤=需要（'./跳蚤'）（续集）；

所以我需要将UserEmployee定义放在用户模型文件中？另外，我还有另一个警告{SequelizeAgerLoadingError:user_tm与user_employee_tm不关联！您还需要创建反向关系。我想补充的是，大小写也很重要。请确保定义名称与稍后使用的名称完全相同。
associate
属性在TypeScript中不存在：（我可以确认这种方法有效……但这真的是个好主意吗？要做到这一点，我们必须（1）将关联（
hasOne
，
belongsTo
等）与模型定义分开放入一个文件中，或者（2）将关联和模型定义放在一个文件中。如果您不想处理将所有模型放在一个文件中的问题，请参阅我的答案，该答案几乎可以做到这一点，但更易于管理。

const sequelize = require('../config/connectionDatabase');
var Sequelize = require('sequelize');
const User = require('../models/user');
const Company = require('../models/company');

var UserEmployee = sequelize.define('user_employee_tm', {
    DateJoin: {
        type: Sequelize.DATE
    },
    UserID: {
        type: Sequelize.INTEGER,
        references: {
            model: User,
            key: "UserID"
        }
    },
    CompanyID: {
        type: Sequelize.INTEGER,
        references: {
            model: Company,
            key: "CompanyID"
        }
    }
});
UserEmployee.belongsTo(Company, {as: 'Company', foreignKey: 'CompanyID'});
UserEmployee.belongsTo(User, {as: 'User', foreignKey: 'UserID'});
module.exports = UserEmployee;



import {Post} from "./post";
import {Tag} from "./tag";

Tag.belongsToMany(Post, {
    through: 'PostTags'
})

Post.belongsToMany(Tag, {
    through: 'PostTags'
})