nodejs怎么同步从一个数据库查询函数中返回一个值
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var schema1 = new Schema({ name: String });
var schema2 = new Schema({ num: Number});
var conn1 = mongoose.createConnection("mongodb://localhost/A表");
var conn2 = mongoose.createConnection("mongodb://localhost/B表");
var model1 = conn1.model('model1',schema1);
var model2 = conn2.model('model2',schema2);
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