更新时间:2023-02-02 23:32:42
创建自引用
Item.hasMany(Item, {as: 'Subitems'})
使用 include 查找子项
To find subitems using include
Item.find({where:{name: "Coffee"},include:[{model: Item, as: 'Subitems'}]})
请参阅下面的示例代码,
See the Sample code below,
var Sequelize = require('sequelize')
, sequelize = new Sequelize("test", "root", "root", {logging: false})
, Item = sequelize.define('Item', { name: Sequelize.STRING })
Item.hasMany(Item, {as: 'Subitems'})
var chainer = new Sequelize.Utils.QueryChainer
, item = Item.build({ name: 'Coffee' })
, subitem1 = Item.build({ name: 'Flat White' })
, subitem2 = Item.build({ name: 'Latte' })
sequelize.sync({force:true}).on('success', function() {
chainer
.add(item.save())
.add(subitem1.save())
.add(subitem2.save())
chainer.run().on('success', function() {
item.setSubitems([subitem1, subitem2]).on('success', function() {
/* One way
item.getSubitems().on('success', function(subitems) {
console.log("subitems: " + subitems.map(function(subitem) {
return subitem.name
}))
})
*/
//The include way you asked
Item.find({where:{name: "Coffee"},include:[{model: Item, as: 'Subitems'}]}).success(function(item) {
console.log("item:" + JSON.stringify(item));
})
})
}).on('failure', function(err) {
console.log(err)
})
})
日志数据如下:
item:{"id":1,"name":"Coffee","createdAt":"2014-08-05T06:25:47.000Z","updatedAt":"2014-08-05T06:25:47.000Z","ItemId":null,"subitems":[{"id":2,"name":"Flat White","createdAt":"2014-08-05T06:25:47.000Z","updatedAt":"2014-08-05T06:25:47.000Z","ItemId":1},{"id":3,"name":"Latte","createdAt":"2014-08-05T06:25:47.000Z","updatedAt":"2014-08-05T06:25:47.000Z","ItemId":1}]}
item:{"id":1,"name":"Coffee","createdAt":"2014-08-05T06:25:47.000Z","updatedAt":"2014-08-05T06:25:47.000Z","ItemId":null,"subitems":[{"id":2,"name":"Flat White","createdAt":"2014-08-05T06:25:47.000Z","updatedAt":"2014-08-05T06:25:47.000Z","ItemId":1},{"id":3,"name":"Latte","createdAt":"2014-08-05T06:25:47.000Z","updatedAt":"2014-08-05T06:25:47.000Z","ItemId":1}]}