sarada.chelluboyena ,
No, since you mentioned in your original post that you wanted Portfolio Items from a specific project, that is the query I provided. If you want Portfolio Items from a Project and all of the Children of that Project, we'll proceed a different way.
It should work if you update your query to be:
https://rally1.rallydev.com/slm/webservice/v2.0/portfolioitem/portfolio/project=https://rally1.rallydev.com/slm/webservice/v2.0/project=project/38840425881&projectScopeDown=true&projectScopeUp=false
Also, to assist you or someone else with the queries I provided above, please ensure that you put a space on each side of the equals sign in the query. So it should be:
query=(project = project/38840425881)
and if using Project.Name it should be:
query=(project.name = "The Project Name")
You may use the URL encoding for the space, %20 if you would like, query=(project%20=%20project/38840425881)
Also, just to be complete, you could use the URL posted first in this response to get items from the specific Project instead of using the query, you may set both the projectScopeUp and projectScopeDown to false:
https://rally1.rallydev.com/slm/webservice/v2.0/portfolioitem/portfolio/project=https://rally1.rallydev.com/slm/webservice/v2.0/project=project/38840425881&projectScopeDown=true&projectScopeUp=true
Michael