getList:function(){     let x = this.data.total     let y = this.data.pageSize     let old_data = this.data.shopList     wx.cloud.callFunction({       name:'twotableQuery',       data:{         collection:'release_Data',         from:'user',         localField:'_openid',         foreignField:'_openid',         as:'seller_id',         match:{           buyer_openid:app.globalData.openid,           buy_status:"交易中"||"交易成功" //我想在这用或，意思是buy_status="交易中"或buy_status="交易成功"         },         sort:{time:-1},         x:x,         y:y       },       success:res=>{         console.log(res)         x=x+y         this.setData({           shopList:old_data.concat(res.result.list),           total:x         })        }     })   } 这是云函数代码 const cloud = require('wx-server-sdk') cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV }) // 使用当前云环境 const db = cloud.database() var $=cloud.database().command.aggregate const _ = db.command // 云函数入口函数 exports.main = async (event, context) => {   return await db.collection(event.collection).aggregate()   .match(event.match).sort(event.sort).limit(event.y).skip(event.x)   .lookup({     from:event.from,     localField: event.localField,     foreignField: event.foreignField,     as: event.as   })   .end({     success:function(res){       return res;     },     fail(error){       return error;     }   }) }