PSI, get project task by task GUID

[Roy G]

Is there a way to get a specific task data by task GUID using PSI? The PSI
function ReadProject(..) returns all project tasks, and is not efficient if I
want to get only one specific project task.
Thanks.
Roy G.

 

[Jim Corbin [MSFT]]

You can use ReadProjectEntities to return only tasks, and then get the
specific task in the returned ProjectDataSet.

http://msdn2.microsoft.com/en-us/library/websvcproject.project.readprojectentities.aspx

 

[Roy G]

Thanks for your reply,
So basically there is no way to retrieve a single Task information other
than reading it from the DB (which is not recommended)?
Is there no way to use a filtered PSI so that not all of the Project's tasks
will be retrieved?
Thanks in advance

 

[Jim Corbin [MSFT]]

The only PSI methods that use a filter for reading data are:
ReadResources
ReadResourcePlan
ReadCustomFields
ReadLookupTables
ReadLookupTablesMultiLang
ReadResourceAssignments

ReadProjectEntities is quite performant.

 

[David]

I have a problem about the guid. In object module, the unique id for task,
resource and assignment is long data type but I can not find it from psi
dataset which only carry guid. Could you please let me know if there is a
way to get same unique id in psi which is same as the one in object module.

 

[Roy G]

Hi David,
The Unique Id is indeed of tyoe Long but the objects you mentioned (or at
least Task, which I use) also have a property (field) called Guid of type
string. Let me know if this helps
Roy

 

[David]

Hi Roy,
We can get unique id (long data type) and GUID (string data type) from
Object module but the PSI dataset only carry GUID for task, resource and
assignment as I see. There might be a way to get both from PSI but I don't
know if I have to use GUID which might cause my problem because I am only
using unique id in Object module which I want it be used in PSI also.
Thanks.