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我想更新我的文檔字段「investorCount」以及在單個貓鼬查詢中的同一文檔中的更多更新。如何訪問文檔字段的先前值並在單個查詢中用貓鼬更新它
我的更新查詢
Campaign.update({"campaign.campaign_Id":data.campaignId},{$push: {"campaign.investorsDetails":{investorId: id,investedAmount: Amtinv }},$set : {"campaign.investorCount" : this."campaign.investorCount" + 1 }},function(error,update){
if(error){
defered.reject(error);
}else{
console.log(update);
defered.resolve(update);
}
});
return defered.promise;
}
我的模式是 -
var campaignSchema = new Schema ({
campaign:
{
campaign_Id : {type: Number ,index :{unique:true}},
beneficiaryAccount : {type : String , required:true},
createdBy : {type : String },
investorsDetails : [{
investorId:{type:Number} ,
investedAmount : {type:Number}
}],
investorCount : {type : Number , default : 0}
}});
我用「這個」操作符來訪問該字段的當前值,但它不能正常工作,請幫我解決這