mongodb

问题 I want to updates only one element in the document to use put request I tried PUT localhost:3000/api/memo/5b8e382d61984255d879f872 { text: "updated!" { but, it updated like this { text: "updated!", imgUrl: null, tag: null, ... } Is there a way to updates one element in document? await Memo.where('_id') .equals(req.params.id) .updateOne({ imgUrl: req.body.imgUrl, text: req.body.text, tag: req.body.tag, user: req.body.user, loc: req.body.loc }) 回答1: You can use the following solution to update

问题 I want to updates only one element in the document to use put request I tried PUT localhost:3000/api/memo/5b8e382d61984255d879f872 { text: "updated!" { but, it updated like this { text: "updated!", imgUrl: null, tag: null, ... } Is there a way to updates one element in document? await Memo.where('_id') .equals(req.params.id) .updateOne({ imgUrl: req.body.imgUrl, text: req.body.text, tag: req.body.tag, user: req.body.user, loc: req.body.loc }) 回答1: You can use the following solution to update

问题 I have a node API which connects to a mongoDB through mongoose. I am creating an advanced results middleware that enabled selecting, filtering, sorting, pagination etc. based on a Brad Traversy course Node.js API Masterclass With Express & MongoDB. This is all good. I am adapting the code from the course to be able to use the $ne (not equal) operator and I want to be able to get a model that is not equal to a nested property (user id) of the model. I am using this for an explore feature to

问题 I have to find all documents in collection, also those nested, by one field that all of them have (common_field). In xpath it would be something like this: //*[@common_field='value']. How to do something like this in mongo? { "_id": ObjectId( "5e3800700045c500cecffb00" ), "common_field": "100281", "other_field": "other", "A": { "common_field": "313000000", "a_field": "a" }, "B": { "common_field": "213125", "b_field": "bb", "B": { "common_field": "543534", "b_field": "b" }, "C": { "common

问题 I have multiple documents In MobgoDB How to do to the group on "abc" and "xyz" and get one document. Please see the "Output Document". need to do the union with ( Document 1 U Document 2 ) and (Document 1 U Document 3) . U= Union Document 1 { "data": { "Inside_data": { "project": { "abc": { "alpha": 4, "beta" : 45 }, "xyz": { "alpha": 214, "beta" : 431 } } } } } Document 2 "Deal": { "name": "abc", "url" : "www.abc.com, "email": [ "abc@gmail.com"], "total": 2 } Document 3 "Deal": { "name":

问题 I’m having trouble to use the text search and the autocomplete because I have a piece with +87k documents, some of them being big (~3.4MB of text). I already: Removed every field from the text index, except title , searchBoost and seoDescription ; these are the only fields copied to highSearchText and the field lowSearchText is always set to an empty string. Modified the standard text index, including the fields type , published and trash in the begining of it. I’m also modified the queries

问题 I am trying to create a route to retrieve the records with nearby location coordinates. I checked the logs and found the "docs" value as undefined. What am I going wrong with? router.get('/userlist/:lat/:lng', function (req, res) { var db = req.db; var lat = req.params.lat, lng = req.params.lng; console.log("lat "+lat); console.log("lng "+lng); var collection = db.get('userlist'); collection.find({ "location": { $nearSphere: { $geometry: { type: "Point" , coordinates: [ lat , lng ] } } } }, {

问题 Failed to load ApplicationContext in conditional scenarios The issue is the 2 repository tests-classes will fail to load the ApplicationContext for the FIRST test-case of that test class IF any other test is run before the class. Project on Github "fix-unit-tests" branch I've got a series of JUnit component tests for a spring-boot maven application using an Mongodb Embedded database. 2 of the test-classes runs unit tests on the 2 spring-repositories. BUT, the test-classes ran by themselves

问题 Currently in Azure ML's while executing python script, with following code. (Python 2.7.11) In which results obtained from the mongoDB are trying to return in DataFrame using pyMongo. I got an error like :: "C:\pyhome\lib\site-packages\pymongo\topology.py", line 97, in select_servers self._error_message(selector)) ServerSelectionTimeoutError: ... ('The write operation timed out',) Please let me know if you know about the cause of the error and what to improve. My Source code : import pymongo

问题 Here is my code file name student.js var mongoose = require('mongoose'); var studentSchema = new mongoose.Schema({ name:{ type: String, required: true }, rollno:{ type: Number, required: true }, grade:{ type: String, required: true }, result:{ type: String, required: true } }); var Student = module.exports = mongoose.model('Student',studentSchema); module.exports.getStudents = function (callback){ Student.find(callback); } **filename app.js** var express = require('express'); var app =