I just started playing around with data services so I'm probably doing some newbie mistake or have misunderstood the url method invoke syntax. I created a simple custom data source and a data service based on it. Querying the IQueryable properties in the data source works fine, and I can filter etc (e.g.
http://host/SomeService.svc/SomeEntities?$filter=Name%20eq%20'abc' ).
Next I added a service method for results that always require a filter. Hitting the method without any parameters works fine (
http://host/SomeService.svc/SomeEntityByName) and the method is invoked when I do so. But whenever I specify a parameter to the method (
http://host/SomeService.svc/SomeEntityByName?name=abc) I get a
System.Data.Services.DataServiceException: Bad Request - Error in query syntax. exception sent straight to HandleException and the method is never invoked.
What is the correct method invoke url syntax for parameters?
Service implementation (simplified for clarity):
public class SomeService : DataService<MyCustomDataSource>
{
public static void InitializeService(IDataServiceConfiguration config)
{
config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
config.SetServiceOperationAccessRule("*", ServiceOperationRights.AllRead);
}
protected override void HandleException(HandleExceptionArgs args)
{
...
}
[WebGet]
public IQueryable<SomeEntity> SomeEntityByName(string name)
{
return base.CurrentDataSource.SomeEntities.Where(u => u.Name == name).AsQueryable();
}
}
public class MyCustomDataSource
{
public IQueryable<SomeEntity>SomeEntities
{
get { ... }
}
}
Exception details:
System.Data.Services.DataServiceException: Bad Request - Error in query syntax.
at System.Data.Services.RequestUriProcessor.ReadOperationParameters(DataServiceHostWrapper host, ServiceOperationWrapper operation)
at System.Data.Services.RequestUriProcessor.CreateFirstSegment(IDataService service, String identifier, Boolean checkRights, String queryPortion, Boolean isLastSegment, Boolean& crossReferencingUrl)
at System.Data.Services.RequestUriProcessor.CreateSegments(String[] segments, IDataService service)
at System.Data.Services.RequestUriProcessor.ProcessRequestUri(Uri absoluteRequestUri, IDataService service)
at System.Data.Services.DataService`1.ProcessIncomingRequestUri()
at System.Data.Services.DataService`1.HandleRequest()
Environment: .net 3.5 SP1, VS2008, KB976127v6, Win7x64
Kristofer -
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DataServiceException: Bad request - error in query syntax when calling service method...
