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mongodb - 如何在 mongodb 中使用两个条件进行更新

问题描述

我正在练习mongodb。

db.inventory.insertMany( [
   { item: "canvas", qty: 100, size: { h: 28, w: 35.5, uom: "cm" }, status: "A" },
   { item: "journal", qty: 25, size: { h: 14, w: 21, uom: "cm" }, status: "A" },
   { item: "mat", qty: 85, size: { h: 27.9, w: 35.5, uom: "cm" }, status: "A" },
   { item: "mousepad", qty: 25, size: { h: 19, w: 22.85, uom: "cm" }, status: "P" },
   { item: "notebook", qty: 50, size: { h: 8.5, w: 11, uom: "in" }, status: "P" },
   { item: "paper", qty: 100, size: { h: 8.5, w: 11, uom: "in" }, status: "D" },
   { item: "planner", qty: 75, size: { h: 22.85, w: 30, uom: "cm" }, status: "D" },
   { item: "postcard", qty: 45, size: { h: 10, w: 15.25, uom: "cm" }, status: "A" },
   { item: "sketchbook", qty: 80, size: { h: 14, w: 21, uom: "cm" }, status: "A" },
   { item: "sketch pad", qty: 95, size: { h: 22.85, w: 30.5, uom: "cm" }, status: "A" }
] );

我倾向于将“cm”和“in”分开，并更新它们，但它不起作用

db.inventory.updateMany(
    { $or [ { "size.h": { $gt:8.75 }, "size.uom": "in" }, 
            {"size.h": { $gt:22.225 }, "size.uom": "cm"} ] },
    {
     $set: {status: "B"},
     $currentDate: {lastModified: true}
    }
)

2019-04-12T22:16:00.575-0700 E QUERY    [js] SyntaxError: missing : after property id @(shell):2:6

标签： mongodb

解决方案

你这样做的方式是正确的，但你有一个语法错误，你在之后缺少冒号$or：

db.inventory.updateMany(
    { $or: [ { "size.h": { $gt:8.75 }, "size.uom": "in" }, 
            {"size.h": { $gt:22.225 }, "size.uom": "cm"} ] },
    {
    $set: {status: "B"},
    $currentDate: {lastModified: true}
    }
)

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