Mongoose - 无法在子文档中推送数组

Question

我正在尝试通过 findOneAndUpdate 推送来更新数组，但我无法让它更新：

这是我尝试推送但没有任何动作的代码：

let pettyCashItem = await PettyCashItems.findOneAndUpdate({
    _id: id, 
    "items._id": idItem },
{
    $set: { 
        "items.$.concept": req.body.concept,
        "items.$.incomeAmount": req.body.incomeAmount,
        "items.$.description": req.body.description,
        "items.$.expenseAmount": req.body.expenseAmount
        $push: {
            'items.$.lastModificationBy': {
                "uid": req.uid,
                "username": req.user.username,
                "comments": req.body.comments
            }
        }
    }
}, { new: 'true'});

这是我的模型：

const PettyCashItemsSchema = Schema (
  {
    items:[{
        concept: {
            type: String,
            maxlength:50,
            required: [true, 'El Concepto es obligatorio']
        },
        incomeAmount:{
            type: Number,
            maxlength:50,
            default:0,
            required: [true, 'El Ingreso es obligatorio']
        },
        expenseAmount:{
            type: Number,
            maxlength:50,
            default:0,
            required: [true, 'El Egreso es obligatorio']
        },
        description: {
            type: String,
            maxlength:50,
            required: [true, 'La Observación es obligatoria']
        },
        status: {
            type: Boolean,
            default: true,
            required: [true, 'El Estatus es obligatorio']
        },
        createdAt: {
            type: Date,
            default: Date.now
        },
        lastModificationBy: [{
            uid:{
                type: String,
                required:true
            },
            username:{
                type: String,
                required:true
            },
            date:{
                type: Date,
                default: Date.now
            },
            comments: {
                type: String,
                maxlength:300,
                required: [true, 'El Comentario es obligatorio']
            }
        }]
    }]

对其他对象使用 $set 的更新是正确的，但是当尝试在数组中执行 $push 时，这永远不会起作用。

谢谢。

Answer 1

尝试将$push 与$set 放在同一级别，而不是$set 的内部级别。

let pettyCashItem = await PettyCashItems.findOneAndUpdate({
    _id: id, 
    "items._id": idItem },
{
    $set: { 
        "items.$.concept": req.body.concept,
        "items.$.incomeAmount": req.body.incomeAmount,
        "items.$.description": req.body.description,
        "items.$.expenseAmount": req.body.expenseAmount
    },
    $push: {
        'items.$.lastModificationBy': {
            "uid": req.uid,
            "username": req.user.username,
            "comments": req.body.comments
        }
    }
}, { new: 'true'});

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