Sequelize.js onDelete:“级联"不删除记录续集 [英] Sequelize.js onDelete: 'cascade' is not deleting records sequelize

问题描述

我有 Product 表和以下列 [id, name, CategoryId] 和 Category 表和 [id, name]

I am having Product table with following columns [id, name, CategoryId] and Category table with [id, name]

产品型号:-

module.exports = function(sequelize, DataTypes) {
  var Product = sequelize.define('Product', {
    name: DataTypes.STRING
  }, {
    associate: function(models) {
      Product.belongsTo(models.Category);
    }
  });
  return Product
}

类别模型:-

module.exports = function(sequelize, DataTypes) {
  var Category = sequelize.define('Category', {
    name: { type: DataTypes.STRING, allowNull: false }
  }, {
    associate: function(models) {
      Category.hasMany(models.Product, { onDelete: 'cascade' });
    }
  });
  return Category
}

当我删除类别时，它只删除类别而不是与之关联的相应产品.我不知道为什么会这样?

when I delete category, it deletes category only not the corresponding products associated with it. I don't know why this is happening?

更新:续集版本 sequelize 1.7.0

==================================================================================回答(我是如何解决的.):-

================================================================================ Answer(How this I have fixed.):-

我通过使用 Alter 命令在数据库上添加约束来实现这一点，因为通过 migration 的 Add Foreign Key Constraint 是一个开放的 sequelize 中的https://github.com/sequelize/sequelize/issues/966"rel="noreferrer">bug.

I accomplished this by adding constraint on database using Alter command, as Add Foreign Key Constraint through migration is an open bug in sequelize.

ALTER TABLE "Products"
ADD CONSTRAINT "Products_CategoryId_fkey" FOREIGN KEY ("CategoryId")
REFERENCES "Categories" (id) MATCH SIMPLE
ON DELETE CASCADE

推荐答案

我相信你应该把 onDelete 放在 Category 模型而不是 products 模型中.

I believe you are supposed to put the onDelete in the Category model instead of in the products model.

module.exports = function(sequelize, DataTypes) {
  var Category = sequelize.define('Category', {
    name: { type: DataTypes.STRING, allowNull: false }
  }, {
    associate: function(models) {
      Category.hasMany(models.Product, { onDelete: 'cascade' });
    }
  });
  return Category
}

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