connection

问题 I was using mysql db to run rspec in rails. After I create an object using factoryGirl, I would like to destroy it so that the db looks clean for the next spec running. Here is how i set up in my spec: before (:each) do User.destroy_all @user = Factory.create :user end after (:each) do @user.destroy end I got an error running rspec: Failure/Error: @user.destroy_all NameError: uninitialized constant User::connection Failure/Error: @user.destroy NameError: uninitialized constant User:

问题 I would like to know if creating a class like the one below would be a good practice. So I would use the self::$mysqli object every time I need to do some work and the connection would only get closed on __desctruct(). Plus, extending the class would still maintain only one connection since $mysqli is declared static. this way I would have only one connection thought the script class db { protected static $mysqli; function __contruct(){ $this->mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB

问题 I'm trying to make a connection database SQL Server 2012 with Netbeans 8.2 Using the connection wizard I select Sql Server 2012 and enter the credentials and fields. However I get the message that a connection cannot be established. You can see screenshots of the entered fields: Full Resolution 回答1: You will need an entry for 'Integrated Security' in your database URL. My connection string, which works, is as follows: jdbc:sqlserver://localhost\ComputerName:1433;databaseName=DatabaseName

问题 I cannot connect my Git repository on GitHub from my VM (VirtualBox / Debian): # git clone git@github.com:username/reponame.git . Cloning into .... ssh: Could not resolve hostname github.com: Name or service not known fatal: The remote end hung up unexpectedly Then I added an entry for GitHub to my /etc/hosts (it will be the wrong way -- don't believe, that it is always necessary): 207.97.227.239 github.com Now I'm getting another error: # git clone git@github.com:username/reponame.git .

问题 Where to set max connections for nodejs(for using express' get ) in windows 10? Is it related to max files(descriptors) setting in linux? Is there a windows version of that setting? Preferably a setting in nodejs so it will be compatible when migrated to unix? I suspect loadtest module gives error because of this setting when over 2000 concurrent connections to attack my server program that uses express and keeps connections in a queue to be processed later. Loadtest finishes normally for 200

问题 I am supposed to use JBoss connection pooling for my application.Right now I don't have any idea about that. I Googled but couldn't get any good link. Can you please share any good link which describes how to define data source, create and use connections in Java ? 回答1: Probably this is what you r looking for: http://www.coderanch.com/t/89511/JBoss/Connection-Pooling This snippet returns the database connection as declared in the xml fragment: InitialContext jndiCntx = new InitialContext();

问题 I have a MySQL Database which I want to connect to from a different computer, preferably using TCP/IP. What is the easiest way to do this. Currently I have tried just putting the IP address of the computer in, and it comes up with Error #1130, which is no help. Any nice easy ways to do this? 回答1: Make sure "skip-networking" is not in your my.cnf file (restart MySQL if it is after changing it), and that you've created a user with permissions to connection from your remote host. Something like:

问题 I want to connect my HTC Desire with Ubuntu 10.04 for app debugging. But i am getting the following message upon running the command adb devices List of devices attached ???????????? no permissions I have tried the steps on the following link, but no success http://developer.android.com/guide/developing/device.html#setting-up Can anyone help me to resolve the issue? 回答1: First of all check if you have a rule for HTC devices. Here is good script for this. Then check if device allowed for

问题 I'm trying to find a way to establish a connection beetwen a Java client and a C server using SSL. This is the java client: import java.io.BufferedWriter; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; import javax.net.ssl.SSLSocket; import javax.net.ssl.SSLSocketFactory; public class Main { public static void main(String[] args) throws IOException { SSLSocketFactory sslsockfact = (SSLSocketFactory) SSLSocketFactory

问题 We have installed Data Studio 4.1.0.0 Client to access the data that is stored in DB2. We have installed DB2 11.1 64bit on our PC which has a Windows 7 64 bit. I need to connect to the DB2 data from 64bit R. We tried the following library (RODBC) driver.name <- "{IBM DB2 ODBC DRIVER}" db.name <- "SBXSHRD" host.name <- "XX.XXX.X.XX" port <- "60012" user.name <- "X20XX4" pwd <- "SXXXXX01" #Connection String con.text <- paste ("DRIVER =", driver.name, "; Database =", db.name, "; Hostname =",