dependency injection help with irecordreaderservice

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Tracey Baird 5 posts 95 karma points

Jan 13, 2022 @ 23:24

Using Umbraco And Getting Started

Umbraco 8

I'm wanting to retrieve all form entries for a particular form.

_readerService is null and I'm not sure what I'm missing:

public class EventBookingSurfaceController : SurfaceController
{
    protected UmbracoHelper _umbraco;
    public EventBookingSurfaceController(UmbracoHelper umbraco) { _umbraco = umbraco; }

    private readonly IRecordReaderService _readerService;
    public EventBookingSurfaceController(IRecordReaderService readerService) { _readerService = readerService; }

    public ActionResult GetBookings()
    {
        IPublishedContent pageNode = _umbraco.Content(1227);

        if (pageNode is Event thisEvent)
        {
            Guid formId = Guid.Parse(thisEvent.RegistrationForm.ToString());

            IEnumerable<IRecord> formRecords = _readerService.GetRecordsFromForm(formId, 1, 1000).Items;

            //Work to do here with formRecords

            return PartialView("_BookedAttendees", formRecords);
        }

        return PartialView("_BookedAttendees");
    }

}

I suspect I'm missing something here with my dependency injection process as "_readerService" is null. Any advice appreciated, Thanks.

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Kevin Jump 2310 posts 14695 karma points MVP 7x c-trib

Jan 14, 2022 @ 15:33
0
Hi Tracey,

have you registered your IRecordReaderService in a composer ?

if you register it via a composer it should be there when the surface controller is initialized.

probably something like :
```
public class MyRecordReaderComposer: IUserComposer
{
    public void Compose(Composition composition)
    {
        composition.RegisterUnique<IRecordReaderService, RecordReaderService>();
    }
}
```
assuming you implimentation of the RecordReaderService is called RecordReaderService

Umbraco will then pick that class up and register your service when umbraco starts up.
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Tracey Baird 5 posts 95 karma points

Jan 16, 2022 @ 04:34

0

Thanks Kevin, I really appreciate your help.

I wondered if that was the direction I needed to head. I had assumed this would work in a similar way to UmbracoHelper which didn't require registration in a composer. I've added a composer but get an error "Cannot access internal class 'RecordReaderService' here".

I'm trying to follow instructions here: https://our.umbraco.com/documentation/Add-ons/umbracoforms/developer/working-with-data/ in order to get submitted form data to process. There isn't really any info on how to implement the RecordReaderService other than "injecting the interface".

This is definitely something I'm new to, I'm assuming there are more steps to get this working. Do you have any further suggestions?

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Tracey Baird 5 posts 95 karma points

Jan 16, 2022 @ 22:56
100
Worked this one out - RecordReaderService is already available but I needed to inject it in the same constructor as the UmbracoHelper:
```
public EventBookingSurfaceController(UmbracoHelper umbraco, IRecordReaderService recordReaderService)
    {
        _umbraco = umbraco;
        _readerService = recordReaderService;
    }
```
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