I'm sure it is a problem with the DSL as it works fine when
implemented in code, I'm just not very familiar with using the DSL.
On 10 Nov, 23:45, webpaul <[EMAIL PROTECTED]> wrote:
> I haven't used the DSL for Rhino ETL, but I would be curious if the
> DSL was handling that input as a separate operation or not. The error
> makes me think that your Write operation isn't getting any rows to it.
> Have you tried making an explicit operation for the read part of your
> process? Also not sure if you should be directly calling the operation
> instead of just registering it with the process and then executing the
> process.
>
> On Nov 10, 1:56 pm, ChrisR <[EMAIL PROTECTED]> wrote:
>
> > I'm trying to export a database table to a file using the latest trunk
> > version of Rhino.Etl and although the file is generated correctly I am
> > getting the following exception:
>
> > 19:49:19.904 Rhino.Etl.Core.Pipelines.ThreadPoolPipelineExecuter:
> > Failed to execute operation writefile.WriteCustomersToFile
> > System.InvalidOperationException: Null enuerator detected, are you
> > trying to read from the first operation in the process?
> > at Rhino.Commons.Guard.Against(Boolean assertion, String message)
> > at
> > Rhino.Etl.Core.Enumerables.EventRaisingEnumerator.System.Collections.Generic.IEnumerable<Rhino.Etl.Core.Row>.GetEnumerator()
> > at
> > Rhino.Etl.Core.Enumerables.EventRaisingEnumerator.GetEnumerator()
> > at
> > Rhino.Etl.Core.Pipelines.ThreadPoolPipelineExecuter.<>c__DisplayClass1.<DecorateEnumerable>b__0(Object)
>
> > Here is my etl file:
>
> > import System
> > import FileHelpers
> > import Rhino.Etl.Core.Files
>
> > [DelimitedRecord("\t")]
> > class Customer:
> > CustomerID as String
> > CompanyName as String
> > ContactName as String
> > ContactTitle as String
> > Address as String
> > City as String
> > Region as String
> > PostalCode as String
> > Country as String
> > Phone as String
> > Fax as String
>
> > operation WriteCustomersToFile:
> > engine as FluentFile = FluentFile.For[of Customer]()
> > engine.HeaderText = "Id\tCompanyName\tContactName"
> > using file = engine.To("export.txt"):
> > for row as Row in rows:
> > cust = row.ToObject[of Customer]()
> > file.Write(cust)
>
> > process ExportCustomers:
> > input "Northwind", Command = "SELECT * FROM Customers"
> > WriteCustomersToFile()
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