node.js - Sequelize-Postgres错误: values. map is not a function

Question

我正在开发 Node + Postgres 应用程序，但在使用 Sequelize 模型架构设置 DataType.ARRAY 时遇到了问题。

这是我的模型架构，

var ArtistRoles = sequelize.define('ArtistRoles', {
    id:{
      primaryKey: true,
      type: DataTypes.UUID,
      defaultValue: DataTypes.UUIDV1
    },
    name:{
      type: DataTypes.STRING,
      allowNull: false
    },
    tags: {
      type: DataTypes.ARRAY(DataTypes.STRING),
      defaultValue: []
    }
  },{
    hooks:{
      beforeCreate: function (role, options) {
        //role.tags = JSON.stringify(role.tags);
        console.log(role.tags);
      }
    },
    classMethods: {
      associate: function (models) {
        // add relations model relations here
        //ArtistRoles.belongsTo(models.Artists);
      }
    }
  });

我使用 Postman 来测试 API，下面是我如何将数据 POST 到服务器， 这是 Node 控制台上的错误跟踪。

TypeError: values.map is not a function
    at ARRAY.BaseTypes.ARRAY.$stringify (~/PROJECTS/my-api/node_modules/sequelize/lib/dialects/postgres/data-types.js:385:33)
    at ARRAY.ABSTRACT.stringify (~/PROJECTS/my-api/node_modules/sequelize/lib/data-types.js:77:17)
    at Object.escape (~/PROJECTS/my-api/node_modules/sequelize/lib/dialects/abstract/query-generator.js:967:32)
    at Object.insertQuery (~/PROJECTS/my-api/node_modules/sequelize/lib/dialects/abstract/query-generator.js:299:28)
    at QueryInterface.insert (~/PROJECTS/my-api/node_modules/sequelize/lib/query-interface.js:497:33)
    at .<anonymous> (~/PROJECTS/my-api/node_modules/sequelize/lib/instance.js:672:56)
    at tryCatcher (~/PROJECTS/my-api/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (~/PROJECTS/my-api/node_modules/bluebird/js/release/promise.js:510:31)
    at Promise._settlePromise (~/PROJECTS/my-api/node_modules/bluebird/js/release/promise.js:567:18)
    at Promise._settlePromise0 (~/PROJECTS/my-api/node_modules/bluebird/js/release/promise.js:612:10)
    at Promise._settlePromises (~/PROJECTS/my-api/node_modules/bluebird/js/release/promise.js:691:18)
    at Async._drainQueue (~/PROJECTS/my-api/node_modules/bluebird/js/release/async.js:138:16)
    at Async._drainQueues (~/PROJECTS/my-api/node_modules/bluebird/js/release/async.js:148:10)
    at Immediate.Async.drainQueues (~/PROJECTS/my-api/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:637:20)
    at tryOnImmediate (timers.js:610:5)
POST /api/1.0/role 500 46.114 ms - 45

可能是什么原因？请帮忙。

Answer 1

对于application/x-www-form-urlencoded，发送到服务器的 HTTP 消息主体本质上是一个巨大的查询字符串。

因此，tags 的值在后端接收时将是字符串格式。 在后端将它转换回 Array 类型，你应该可以开始了