Question

从这篇文章：Node.js / Sequelize.js / Express.js - How to insert into many-to-many association? (sync/async?)

答案仅在您创建个人和电子邮件时显示，但是，我想创建一个已创建电子邮件的个人。

正确创建个人和电子邮件的原始答案：

models.Individual.create({
  name: "Test"
}).then(function(createdIndividual) { // note the argument
  models.Email.create({
    address: "test@gmail.com"
  }).then(function(createdEmail) { // note the argument
    createdIndividual.addEmail(createdEmail)
      .then(function(addedEmail) { // note th-- well you get the idea :)
        console.log("Success");
      });
  })
});

要使用已创建的电子邮件创建个人，我将其修改为：

models.Individual.create({
  name: "Test"
}).then(function(createdIndividual) { // note the argument
    //This email id exists in the Email table.
    var email = {
        id: 1
    }
    createdIndividual.addEmail(email)
    .then(function(addedEmail) {
        console.log("Success");
    });
});

然后我收到了这个错误：

Unhandled rejection TypeError: val.replace is not a function
        at Object.SqlString.escape (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/sql-string.js:63:15)
        at Object.QueryGenerator.escape (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:977:22)
        at /Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:2203:23
        at Array.map (native)
        at Object.QueryGenerator.whereItemQuery (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:2202:49)
        at /Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:1903:25
        at /Users/Roller/Working/Web/ponds_web/node_modules/sequelize/node_modules/lodash/lodash.js:4389:15
        at baseForOwn (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/node_modules/lodash/lodash.js:2652:24)
        at Function.forOwn (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/node_modules/lodash/lodash.js:12254:24)
        at Object.QueryGenerator.whereItemsQuery (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:1902:9)
        at Object.QueryGenerator.getWhereConditions (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:2337:19)
        at Object.QueryGenerator.selectQuery (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/dialects/abstract/query-generator.js:1451:28)
        at QueryInterface.select (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/query-interface.js:669:25)
        at .<anonymous> (/Users/Roller/Working/Web/ponds_web/node_modules/sequelize/lib/model.js:1390:32)
        at tryCatcher (/Users/Roller/Working/Web/ponds_web/node_modules/bluebird/js/release/util.js:16:23)
        at Promise._settlePromiseFromHandler (/Users/Roller/Working/Web/ponds_web/node_modules/bluebird/js/release/promise.js:504:31)

我认为这个错误是因为我的电子邮件对象不是Sequelize对象。

记住问题：

我们是否应该通过电子邮件模型查询将电子邮件对象转换为Sequalize对象？它会起作用吗？

将该对象转换为Sequalize的更好方法是什么？干净的代码和性能是什么？

如果在创建新产品时有多封电子邮件要添加到Individual_Email中，该怎么办？喜欢超过1个电子邮件ID。

请帮助建议。谢谢。

Answer 1

你是对的，问题是电子邮件不是一个续集对象。如果在添加之前从数据库中检索它，它将起作用。另一方面，sequelize允许您通过id设置子项。所以你可以这样做：

models.Individual.create({
  name: "Test"
}).then(function(createdIndividual) {
    createdIndividual.setEmails([emailIds]) //emails id array
    .then(function() {
        console.log("Success");
    });
});

Sequelize.js Node.js：如何传递已经创建的对象来创建多对多关系？

1 个答案: