Generate SQL script from Entity Framework migration script
It is not recommended to execute Entity Framework migration scripts in production, It is important that you execute all SQL steps manually on the production database section-by-section to immediately see the result and be able to recover in case a…
DbUpdateConcurrencyException: Database operation expected to affect 1 row(s) but actually affected 0 row(s). Data may have been modified or deleted since entities were loaded.
The .NET Core Entity framework makes database access easy. When you auto-generate a Razor page in a .NET web application to edit a data row, the scaffolding places controls on the page for every column. There are columns in most of the tables that we…
Splunk App for AWS
To collect data from AWS install the Splunk App for AWS plugin. The app currently can collect information from AWS Config, Config Rules, CloudTrail, Inspector, CloudWatch, CloudWatch Logs, Billing, S3, Kinesis, Metadata. New data source To set up a new…
Skip steps in an InSpec integration test based on Chef attribute values
To speed up the test of some complex recipes, I use an attribute to skip certain long-running installations when I only need to test the rest of the recipe. We will pass Chef Attribute values into an InSpec test using environment variables. Declare an…
java.lang.NoClassDefFoundError, java.lang.ClassNotFoundException
When you add a dependency reference to a Java project, it may compile without any errors, but runtime you may get an error message similar to this: HTTP Status 500 – Internal Server Error Type Exception Report Message An exception occurred processing JSP…
Java Spring MVC web application configuration in NetBeans 8
When you create a Java Spring MVC web application or make changes to an existing one, it is important to know the location of configuration values. Java package name The Java package name is stored in Every .java file package MY_PACKAGE_NAME pom.xml file…
org.apache.jasper.JasperException: java.lang.IllegalStateException: No output folder
This error can happen on Linux and Windows, and the cause could be the same. On Windows Server 2012R2 I opened a command prompt. To be able to delete a directory from the Tomcat webapps folder, I have issued the shutdown command. When I started the…
Only persistence units with transaction type JTA can be used as a container managed entity manager
NetBeans can use multiple deployment servers. When your web application uses the Entity Framework and you select the Glassfish server as the deployment server, you can get the error message when you try to run your application in the IDEÉ Severe:…
Git Bash and Command Prompt cannot see the VirtualBox shared folder on Windows 10 guest
When you start a Windows 10 guest machine in VirtualBox on your workstation, you can set up shared folders to seamlessly copy files between your workstation and the Windows 10 guest machine. The shared folder appears in Windows Explorer as a mapped…
Refresh the environment variables in the Windows Command Prompt and PowerShell window
When the Windows Command Prompt and PowerShell windows open, they read the environment variables from the registry. If another process changes the value of an environment variable or creates a new one, the already open windows don’t reflect those…