nullobject | Null Object Design Pattern Ruby implementation | Architecture library

I wrote an static method that do what you need.

Note 1: I can't tell what the code looks like when you moved the methods to the service, you might want to include the code that fails.

That said, it looks like you're declaring your pidService inside your method, with a default value of null, then trying to call methods on it.

try changing this:

To avoid build failure, for now, I enabled try and catch and setting value for BUILD_USER if getCause(...) is going to fail ... as when someone clicks on the side-bar link Scan MultiBranch Pipeline Now, then console output or Jenkins doesn't set a USER who clicked on that side-bar link to launch the build (if there are any changes to be built) and shows Branch Indexing as first line in output (instead of showing: Started by user (someUserID)).

Thus, the following will set BUILD_USER to a meaningful value and won't FAIL the build.

You can get the output you want with a few simple changes.

1. In your TreeNode class, change the type of the RowJToken from JToken to JObject. (You might also want to change the property name to RowJObject as well, to be consistent, but that is not strictly necessary.)

It seems that there is something wrong with the serialization process. On my side, the string field can be returned properly. By default, the DataContractSerializer is used to deserialize/deserialize the complex object data.
https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/using-data-contracts
The most possible reason might be that the nullable field is not decorated by the [DataMember] attribute. Please check if the column of the DataContract autogenerated on the client-side contains the [DataMember] attribute.
http://sivakrishnakuchi.blogspot.com/2010/05/troubleshoot-wcf-service-returning.html
Feel free to let me know if the problem still exists.

Jenkins pipelines execute Groovy code in the continuation-passing style using groovy-cps interpreter. This is not vanilla Groovy you can execute directly in the IDE or in Groovy Shell.

Groovy CPS transforms your code to support the continuation-passing style and the correct Groovy expression like:

The way you execute bat step does not return any output.

You can change the Semester field type to many2one and set the attribute widget to selection in the view definition.
When the value of cou_id changes you have just to filter the records shown in the selection field by returning a custom domain.