passing a string[] as a parameter to transformer

[Stacey]

I'm trying to pass a string[] value as a parameter to a transformer that is intending to use it, as seen below;

public ArticleByRolesTransformer()

        {

            TransformResults = results => from result in results

                                          let roles = ParameterOrDefault("roles", new string[] { "guest" }).Value<string[]>()

                                          select new Result

                                          {

                                              Id = result.Id,

                                              Name = result.Name,

                                              Actions = new Dictionary<string, bool>

                                              {

                                                  {"read", result.Roles["read"].ContainsAny(roles) },

                                                  {"edit", result.Roles["edit"].ContainsAny(roles) }

                                              }

                                          };

        }

and this is how I'm wiring it into the transformer;

var results = await RavenSession.Query<Article>()

                    .Where(n => n.Owner == node.ToIdentity<Article>())

                    .Where(n => n.Roles["read"].ContainsAny(roles))

                    .Where(n => n.Online)

                    .TransformWith<

                        Raven.ArticleByRolesTransformer,

                        Raven.ArticleByRolesTransformer.Result

                        >()

                    .AddTransformerParameter("roles", RavenJToken.FromObject(roles))

                    .ToListAsync();

But I'm getting an error ..

Url: "/databases/testing-isolated/indexes/dynamic/Articles?&query=%28Owner%3Aarticles%2F0%29%20AND%20%28%20%28Roles.read%3Aplayer%20OR%20Roles.read%3Astaff%20OR%20Roles.read%3Aadmin%29%29%20AND%20%28Online%3Atrue%29&pageSize=128&SortHint-Online=String&resultsTransformer=ArticleByRolesTransformer&tp-roles=[%0D%0A%20%20%22player%22,%0D%0A%20%20%22staff%22,%0D%0A%20%20%22admin%22%0D%0A]"

System.InvalidOperationException: The transform results function failed.

Doc 'articles/1', Error: Unable to find suitable conversion for System.String since it is not predefined and does not implement IConvertible.

Doc 'articles/8', Error: Unable to find suitable conversion for System.String since it is not predefined and does not implement IConvertible.

Doc 'articles/15', Error: Unable to find suitable conversion for System.String since it is not predefined and does not implement IConvertible.

Doc 'articles/22', Error: Unable to find suitable conversion for System.String since it is not predefined and does not implement IConvertible.

Doc 'articles/29', Error: Unable to find suitable conversion for System.String since it is not predefined and does not implement IConvertible.

Doc 'articles/36', Error: Unable to find suitable conversion for System.String since it is not predefined and does not implement IConvertible.

   at Raven.Database.Actions.QueryActions.DatabaseQueryOperation.Execute(Action`1 onResult) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Actions\QueryActions.cs:line 289

   at Raven.Database.Actions.QueryActions.<>c__DisplayClasse.<Query>b__a(IStorageActionsAccessor accessor) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Actions\QueryActions.cs:line 119

   at Raven.Storage.Esent.TransactionalStorage.ExecuteBatch(Action`1 action, EsentTransactionContext transactionContext) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Storage\Esent\TransactionalStorage.cs:line 850

   at Raven.Storage.Esent.TransactionalStorage.Batch(Action`1 action) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Storage\Esent\TransactionalStorage.cs:line 811

   at Raven.Database.Actions.QueryActions.Query(String index, IndexQuery query, CancellationToken externalCancellationToken) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Actions\QueryActions.cs:line 108

   at Raven.Database.Queries.DynamicQueryRunner.ExecuteActualQuery(IndexQuery query, DynamicQueryMapping map, Tuple`2 touchTemporaryIndexResult, String realQuery, CancellationToken token) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Queries\DynamicQueryRunner.cs:line 64

   at Raven.Database.Queries.DynamicQueryRunner.ExecuteDynamicQuery(String entityName, IndexQuery query, CancellationToken token) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Queries\DynamicQueryRunner.cs:line 42

   at Raven.Database.Queries.DynamicQueryExtensions.ExecuteDynamicQuery(DocumentDatabase self, String entityName, IndexQuery indexQuery, CancellationToken token) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Queries\DynamicQueryExtensions.cs:line 19

   at Raven.Database.Server.Controllers.IndexController.PerformQueryAgainstDynamicIndex(String index, IndexQuery indexQuery, Etag& indexEtag, HttpResponseMessage msg, CancellationToken token) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\Controllers\IndexController.cs:line 713

   at Raven.Database.Server.Controllers.IndexController.ExecuteQuery(String index, Etag& indexEtag, HttpResponseMessage msg, CancellationToken token) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\Controllers\IndexController.cs:line 607

   at Raven.Database.Server.Controllers.IndexController.GetIndexQueryResult(String index, CancellationToken token) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\Controllers\IndexController.cs:line 578

   at Raven.Database.Server.Controllers.IndexController.IndexGet(String id) in c:\Builds\RavenDB-Stable-3.0\Raven.Database\Server\Controllers\IndexController.cs:line 182

   at lambda_method(Closure , Object , Object[] )

   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)

   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()

Which seems to me that it can't figure out what to do with a string[]. Is there another way to solve this? I'm a bit unclear about what kinds of parameters can be sent to a transformer.

[Oren Eini (Ayende Rahien)]

What does the transformer looks like server side?

Hibernating Rhinos Ltd  

Oren Eini l CEO l Mobile: + 972-52-548-6969

Office: +972-4-622-7811 l Fax: +972-153-4-622-7811

 

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