在Sequelize> = 1.7
we can use promises
你能为我解释一下如何从这个代码中获取每个用户的价值：@H_404_3@
var User = sequelize.define("user",{
username: Sequelize.STRING
})
User
.sync({ force: true })
.then(function() { return User.create({ username: 'John' }) })
.then(function(john) { return User.create({ username: 'Jane' }) })
.then(function(jane) { return User.create({ username: 'Pete' }) })
.then(function(pete) {
console.log("we just created 3 users :)")
console.log("this is pete:")
console.log(pete.values)
// what i want:
console.log("this is jane:")
console.log(jane.values)
console.log("this is john:")
console.log(john.values)
})
UPD@H_404_3@
所有值需要与其他模型的集合关联.
其实我需要一些像这样的代码：@H_404_3@
User.hasMany(Group)
Group.hasMany(User)
User
.sync({ force: true })
.then(function() { return User.create({ username: 'John' }) })
.then(function(john) { return User.create({ username: 'Jane' }) })
.then(function(jane) { return User.create({ username: 'Pete' }) })
.then(function(pete) { return Group.findOrCreate({id: 1}) })
.then(function(group) {return group.setUsers([john,jane,pete])})
.then(function(result) { console.log(result)})
})
解决方法
蓝鸟的方式是
collection helper functions.
User.sync({ force: true })
.then(function() {
return Promise.map( ['John','Jane','Pete'],function(name) {
return User.create({ username: name });
})
}).spread(function(john,pete) {
console.log("we just created 3 users :)")
console.log("this is john:")
console.log(john.values)
console.log("this is jane:")
console.log(jane.values)
console.log("this is pete:")
console.log(pete.values)
})
如果您需要连续创建它们,请将其更改为mapSeries(3.0).@H_404_3@
如果数组不需要是动态的,而您只需要像在示例中一样通过承诺链传递共享值,请查看How do I access previous promise results in a .then() chain?.@H_404_3@
