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社区首页 >问答首页 >Sequelize:查询中的额外列

Sequelize:查询中的额外列
EN

Stack Overflow用户
提问于 2020-10-27 19:36:28
回答 1查看 456关注 0票数 0

我有下表定义

产品表

代码语言:javascript
复制
const Product = sequelize.define('product', {
  name: { type: Sequelize.TEXT },
  amount: { type: Sequelize.DECIMAL },
  category: { type: Sequelize.BIGINT, field: 'categoryId' },
  brand: { type: Sequelize.BIGINT, field: 'brandId' },
  vendor: { type: Sequelize.BIGINT, field: 'vendorId' },
  status: { type: Sequelize.BIGINT, field: 'statusId' },
  image: { type: Sequelize.TEXT },
  stock: { type: Sequelize.INTEGER },
  description: { type: Sequelize.TEXT },
  model: { type: Sequelize.TEXT },
  code: { type: Sequelize.TEXT },
});

状态表

代码语言:javascript
复制
const Statuses = sequelize.define('statuses', {
  name: {
    type: Sequelize.TEXT
  },
});

联想

代码语言:javascript
复制
Product.belongsTo(Statuses, { foreignKey: 'statusId', as: 'productStatus'});

当我运行这个程序时:

代码语言:javascript
复制
product = await Product.findOne({
  where: {
    id: req.query.id
  }, 
  include: ['productStatus']
})

我得到以下查询:

代码语言:javascript
复制
SELECT 
"product"."id", 
"product"."name", 
"product"."amount", 
"product"."categoryId" AS "category", 
"product"."brandId" AS "brand", 
"product"."vendorId" AS "vendor", 
"product"."statusId" AS "status", 
"product"."image", 
"product"."stock", 
"product"."description", 
"product"."model", 
"product"."code",
"product"."createdAt", 
"product"."updatedAt", 
"product"."statusId", 
"product"."categoryId", 
"product"."vendorId", 
"product"."brandId", 
"productStatus"."id" AS "productStatus.id", 
"productStatus"."name" AS "productStatus.name", 
"productStatus"."createdAt" AS "productStatus.createdAt", 
"productStatus"."updatedAt" AS "productStatus.updatedAt", 
"productStatus"."status" AS "productStatus.status" 
FROM "products" AS "product" 
LEFT OUTER JOIN "statuses" AS "productStatus" ON "product"."statusId" = "productStatus"."id" 
WHERE "product"."id" = '1'

不知道为什么

代码语言:javascript
复制
"productStatus"."status" AS "productStatus.status" 

因为状态表中没有该列,因此它会导致未知的列错误吗?

EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2020-10-28 07:31:50

User.hasOne(Status, { foreignKey: 'status', as: 'UserStatus'})意味着Status有一个不为真的status列。这就是Sequelize知道Status模型有status列并将其添加到SQL中的原因。

我认为Userstatus列而不是Status。如果是这样的话,您所需要的就是像这样改变关联:

代码语言:javascript
复制
User.belongsTo(Status, { foreignKey: 'status', as: 'UserStatus'})
票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/64561697

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