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

仅当您创建个人和电子邮件时才会显示答案，但是，我想使用已创建的电子邮件创建个人。

正确依次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");
    });
});

然后我得到这个错误:

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。

心中的问题:

我们是否应该通过电子邮件模型的查询将电子邮件对象转换为 Sequalize 对象？它会工作吗？

考虑到干净的代码和性能，将该对象转换为 Sequalize 的更好方法是什么？

如果我在创建新产品时有多个电子邮件要添加到 Individual_Email 怎么办？喜欢超过 1 个电子邮件 ID。

请帮忙指教。谢谢。

最佳答案

你是对的，问题是 email 不是 sequelize 对象。如果您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 child 。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");
    });
});

关于mysql - 续集.js Node.js : How to Pass Already Created Object to Create Many-to-Many relationship?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38279085/