Schema: the update I want to implement is to store the same carId, for the stopName in the stops array. How should I implement such batch updates in mongoose? Common Update on the Internet is for a single field, did not encounter such a case, please ...
I want to restore a single table, the command written like this mongorestore --username admin --password "pwdmongo" --db poi --collection newPoi newPoi.bson but keep prompting errors connected to: 127.0.0.1 assertion: 18 { ok: 0.0, errmsg: ...
I use the following code on Robo 3T (a mongodbGUI software) db.getCollection( json ).find({"time":{$gte:1528771648859,$lte:1528771698869}},{"data":{$elemMatch :{"deviceid":456789123}}}) can get the results I want, but I...
the same query, using mongoTemplate will be much slower, using mongodb tool, looking at the execution plan is very fast, the difference is very big ...
I am very happy to come to Sifei website for the first time. Today, I encountered a small problem when I was learning mongodb to configure the master-slave server, that is, when I set the ip and port of the master-slave server, logging in to the master ...
I check in the background that there are multiple indexes of a table in the database I have rebuilt a table. Is there any way to add all the indexes to ...
I use a third-party package of huya-danmu to monitor the on-screen gift of Huya TV s live studio address: https: github.com BacooTang . and store the on-screen gift information in mongodb. The logic is to obtain all stored addresses of Tiger Tooth s...
mongodump or mongoexport use-- query,but have not filter ed the result, it export s all data. my condition is like this: { "modifiedOn ": ISODate ( "2018-06-06T00:00:12.539+0000 ")} and i change it < del > is < del > to 1528244529 but when i...
users upload words through the web page, limiting the total number of words uploaded by each user and the space occupied by all words. If the words are not duplicated, how to design a database to save each word uploaded by a user? to ensure that the tota...
Environment: centos7 mongodb version: v3.6.4 Server: Tencent Cloud problem description: when the mongodb, started on the server can be connected, but the link command with non-localhost (or 127.0.0.1), the connection fails, and the IP is either the ...
1. See the introduction of the official website in which the rectangle $box method only supports 2d indexes. Only the 2d geospatial index supports $box. the official 2dsphere index is also recommended. The method I know now, geoWithinBox, uses a 2d ...
1.windows after successfully installing mongodb, the pop-up box indicates that the installation location is incorrect, and then the file of the installation location is gone. Here is the screenshot: the above pictures are listed in order. When t...
personal blog A personal blog written by has a concurrency problem: using Aliyun s pts to test concurrency, it is found that when the number of concurrency reaches 8 (which is negligible), the database query is particularly slow (there is very littl...
the problem is complicated, so make the description as simple as possible for example, a data table that stores articles is stored in mongodb 1. There are uncertain columns, such as click rate, content, title, reply, and the number of user uid, bene...
mongodb version is ^ 3.0.9 ...
is it that the database records the current request ip address and then saves a field, and then checks each request to see if it exists, and if so, it prompts that it cannot be registered ?...
I queried a collection of coordinates within a region and found that when the range was particularly large (> 300km), I looked up some coordinates outside the range. Is this because the radius error is too large, or is there something wrong with the co...
mongodb node mongodb node request mongodb con ...
:projectDao.js var mongoose = require( mongoose ) const Project = mongoose.model( Project ) exports.createProject = async(data) => { data.m.projectModelId=data.m.projectModel.split( , )[0] data.m.projectModelName=data.m.projectModel.spli...
two mongodb nodes, active standby mode, look at the data catalogue under the two nodes. It is found that the data directory of the primary node is 23GB, and the directory details are as follows: data11GB,: . the amount of db.collection.stats () da...
now want to implement a questionnaire question answering system. The current framework uses vue.js and mint-ui if you click the "No " radio option, it will jump to the specified question. if you select Yes, continue to answer the question. I don t ...
questions such as No complete examples of code scanning can be found on the Internet, who has WeChat end and embedded page code. related codes JSSDK < script type= "text javascript " src= " https: res.wx.qq.com open js.;>< script> is intr...
I have no problem passing a single data to the subcomponent, but the object is wrong subcomponent: <template> <div class="nowinfo" > <div class="nowinfo-header">< div> <div class="nowinfo-c...
current status: I am now a project, there are 1k websites, these sites are just different styles, each site has its own personalized css style, for example, the color of the button of different sites is different. requirements: all websites now add a ...
as a rookie: it blurs the three concepts related to agency. nginx is a web server. It is understandable that we see the server responsible for displaying the web website webpack local agent, proxying the requested api address to the local natapp ...