Question

我正在对数据库进行简单的加减。我有两个值CurrentAccount和RecentlyWithdrawn。现在，有兴趣进行更新的值是AfterCurrentAccount-坏名，但与我同在。 AfterCurrentAccount公式如下。

减去AfterCurrentAccount = CurrentAccount - RecentlyWithdrawn if Credit = 0 and RecentlyWithdrawn => 1

添加AfterCurrentAccount = CurrentAccount + Credit RecentlyWithdrawn if RecentlyWithdrawn = 0 and Credit => 1

但注释：AfterCurrentAccount总是以等于开头到CurrentAccount

技术堆栈：Node.js，Mongoose，Express，Body-Parser

模式：

const PostSchema = Schema({
    CurrentAccount: {
        type: Number,
        default: 0,
        required: true
    },
    name: {
        type: String,
        required: true
    },
    RecentlyWithdrawn:{
        type: Number,
        required: true
    },
    Credit:{
        type: Number,
        required: true
    },
    date: {
        type: Date,
        default: Date.now
    },
    AfterCurrentAccount: {
        type: Number,
        default: CurrentAccount
    }
});

//减？

如果CurrentAccount> 0并且'Credit'= 0

，我想从RecentlyWithdrawn减去一个金额

router.post('/:postId', async (req, res) =>{
    const post = new Post({
        name:  req.body.name,
        CurrentAccount: req.body.CurrentAccount,
        RecentlyWithdrawn: req.body. RecentlyWithdrawn,
        AfterCurrentAccount: req.body.CurrentAccount,
    });
   try{
        const updatePost = await Post.updateOne({_id: req.params.postId}, {$subtract: {CurrentAccount: req.body.CurrentAccount},{RecentlyWithdrawn: req.body.CurrentAccount});
        res.json(updatePost);
   }catch(err){
        res.json({message: err});
   }
});

//添加？

如果CurrentAccount = 0且'Credit'> 0

，我想从RecentlyWithdrawn减去一个金额

router.post('/:postId', async (req, res) =>{
    const post = new Post({
        name:  req.body.name,
        CurrentAccount: req.body.CurrentAccount,
        RecentlyWithdrawn: req.body. RecentlyWithdrawn,
        AfterCurrentAccount: req.body.CurrentAccount,
        Credit: req.body.Credit,
    });
   try{
        const updatePost = await Post.updateOne({_id: req.params.postId}, {$add: {CurrentAccount: req.body.CurrentAccount},{RecentlyWithdrawn: req.body.CurrentAccount});
        res.json(updatePost);
   }catch(err){
        res.json({message: err});
   }
});

猫鼬+ NodeJ：添加和减去两个字段并给出响应

0 个答案: