db.command.and

查询指令,用于表示逻辑 "与" 的关系,表示需同时满足多个查询筛选条件

示例代码

如筛选出进度大于 50 小于 100 的 todo:

流式写法:

const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database()
const _ = db.command
exports.main = async (event, context) => {
  try {
    return await db.collection('todo').where({
      progress: _.gt(50).and(_.lt(100))
    }).get()
  } catch(e) {
    console.error(e)
  }
}

前置写法:

const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database()
const _ = db.command
exports.main = async (event, context) => {
  try {
    return await db.collection('todo').where({
      memory: _.and(_.gt(50), _.lt(100))
    }).get()
  } catch(e) {
    console.error(e)
  }
}