connection

问题 I am trying to connect MongoDB database with this code but when running it I get the error (see the error below after the code). The initial error was in the line where it was resolved by adding useNewUrlParser: true but even after this I still get more errors. I am using MongoDB version 4.0.1. Does anybody know how to resolve this error? mongoose.connect('User://localhost:27017/User',{ useNewUrlParser: true }) Error while running this code: (node:11068) UnhandledPromiseRejectionWarning:

问题 I am trying to connect MongoDB database with this code but when running it I get the error (see the error below after the code). The initial error was in the line where it was resolved by adding useNewUrlParser: true but even after this I still get more errors. I am using MongoDB version 4.0.1. Does anybody know how to resolve this error? mongoose.connect('User://localhost:27017/User',{ useNewUrlParser: true }) Error while running this code: (node:11068) UnhandledPromiseRejectionWarning:

问题 I am trying to connect MongoDB database with this code but when running it I get the error (see the error below after the code). The initial error was in the line where it was resolved by adding useNewUrlParser: true but even after this I still get more errors. I am using MongoDB version 4.0.1. Does anybody know how to resolve this error? mongoose.connect('User://localhost:27017/User',{ useNewUrlParser: true }) Error while running this code: (node:11068) UnhandledPromiseRejectionWarning:

问题 how do you continously check internet access? I was able to show if wifi is connectected or mobile data. However, not all connection would have internet access. import 'package:connectivity/connectivity.dart'; var connectivityResult = await (Connectivity().checkConnectivity()); if (connectivityResult == ConnectivityResult.mobile) { // I am connected to a mobile network. } else if (connectivityResult == ConnectivityResult.wifi) { // I am connected to a wifi network. } This is currently the

问题 I'm running a Docker container on MacOS that starts a Postgres server and MongoDB server as follows: docker run -p 80:80 -p 27017:27017 dockertest * Starting PostgreSQL 9.3 database server ...done. * Starting database mongodb ...done. The output shows that the MongoDB server is started correctly. Then I lookup the IP of the VM in which the container is running, like this: docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS default * virtualbox Running tcp://192.168.99.100:2376

问题 I'm running a Docker container on MacOS that starts a Postgres server and MongoDB server as follows: docker run -p 80:80 -p 27017:27017 dockertest * Starting PostgreSQL 9.3 database server ...done. * Starting database mongodb ...done. The output shows that the MongoDB server is started correctly. Then I lookup the IP of the VM in which the container is running, like this: docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS default * virtualbox Running tcp://192.168.99.100:2376

问题 I'm running a Docker container on MacOS that starts a Postgres server and MongoDB server as follows: docker run -p 80:80 -p 27017:27017 dockertest * Starting PostgreSQL 9.3 database server ...done. * Starting database mongodb ...done. The output shows that the MongoDB server is started correctly. Then I lookup the IP of the VM in which the container is running, like this: docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS default * virtualbox Running tcp://192.168.99.100:2376

问题 I'm trying to move data from a datalake stored in Azure Data Lake Storage Gen1 to a table in an Azure SQL database. In Data Factory "new Linked Service" when I test the connection I get a "connection failed" error message, "Access denied...make sure ACL and firewall rule is correctly configured in the Azure Data Lake Store account. I tried numerous times to correct using related Stack overflow comments and plethora of fragmented Azure documentation to no avail. Am I using the correct approach

问题 I'm currently trying to develop an application that uses the Modbus-RTU protocol, and I have to use modbus_tk in Python 2.7. I'm supposed to use bits of code from another application which is able to communicate with the micro-controller via modbus. It works on that app when I run the following code, but I get an error when I run the same lines in my app. import modbus_tk import modbus_tk.defines as cst import modbus_tk.modbus_rtu as modbus_rtu import serial MB_Add_Status = 8 + 5001 def MB

问题 I'm now working on a tcp socket connection to tcp server running in ESP32. It works fine for the communication, but I failed to close the connection. After searching for the solution on close/reset tcpClient, it seems that the proper way to close a tcpClient should be: tcpClient.GetStream().Close(); tcpCLient.Close(); The example in msdn also use this method. But unforunately, it cannot really close the connection. As checked in the mcu, the connection has not been closed. And it will not be