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create appointment, unable to set RegardingObjectId property RRS feed

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    I have an application which creates and manages leave requests. I want to be able to populate the standard calendars with information about these leave requests. So I do;

    ActivityParty who = new ActivityParty()
{ 
    PartyId = new EntityReference(SystemUser.EntityLogicalName, lr.widget_leave_employee.Id),
};

Appointment app = new Appointment()
{
    Subject = lr.widget_leave_type.Name,
    ScheduledStart = lr.widget_leave_Startdate.Value.Date.AddHours(utilities.GetBool(lr.widget_Leave_StartAM2, true) ? 0 : 12),
    ScheduledEnd = lr.widget_leave_Enddate.Value.Date.AddHours(utilities.GetBool(lr.widget_Leave_EndPM2, true) ? 24 : 12),
    OwnerId = new EntityReference()
    {
        Id = lr.widget_leave_employee.Id,
        LogicalName = SystemUser.EntityLogicalName,
    },

    RequiredAttendees = new ActivityParty[] { who },
};
Guid appid = service.Create(app);

    Which is all well and guid and it works. I also want to reference the leave request from the appointment. This is so that if leave requests are changed I can find the corresponding appointment and update it. So I try;

    ActivityParty who = new ActivityParty()
{ 
    PartyId = new EntityReference(SystemUser.EntityLogicalName, lr.widget_leave_employee.Id),
};

Appointment app = new Appointment()
{
    Subject = lr.widget_leave_type.Name,
    ScheduledStart = lr.widget_leave_Startdate.Value.Date.AddHours(utilities.GetBool(lr.widget_Leave_StartAM2, true) ? 0 : 12),
    ScheduledEnd = lr.widget_leave_Enddate.Value.Date.AddHours(utilities.GetBool(lr.widget_Leave_EndPM2, true) ? 24 : 12),
    OwnerId = new EntityReference()
    {
        Id = lr.widget_leave_employee.Id,
        LogicalName = SystemUser.EntityLogicalName,
    },

    RegardingObjectId = new EntityReference
    {
        Id = lr.Id,
        LogicalName = widget_leaverequest.EntityLogicalName,
    },
    RequiredAttendees = new ActivityParty[] { who },
};
Guid appid = service.Create(app);
    This now fails with the message about an invalid parent referring to the RegardingObjectId field. So what is this complaining about. Is an appointment unable to refer to a custom entity or am I doing something wrong. I could create a field in my custom entity to hold a reference to the appointment but I was hoping to avoid needing to write back to the custom entity again.

    Tuesday, November 5, 2013 3:54 PM

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    The code looks OK. Is the widget_leaverequest entity configured to link to activities ?

    Microsoft CRM MVP - http://mscrmuk.blogspot.com/ http://www.excitation.co.uk

    • Marked as answer by J N Brand Wednesday, November 6, 2013 11:07 AM
    Wednesday, November 6, 2013 10:24 AM
    Moderator

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    Your RegardingObjectId is set based on properties of the lr and widget_leaverequest variables, but you haven't shown how these are instantiated. I expect it is a problem with one or other of these variables

    Microsoft CRM MVP - http://mscrmuk.blogspot.com/ http://www.excitation.co.uk

    Tuesday, November 5, 2013 4:43 PM
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    This is invoked in a post create plug in and the lr entity is the entity that was created and passed into that plugin;

    var entity = context.InputParameters["Target"] as Entity;
var entity2 = service.Retrieve(widget_leaverequest.EntityLogicalName, entity.Id, new Microsoft.Xrm.Sdk.Query.ColumnSet(true));

if (entity != null)
{
    // NB this works in create but in update most of the parameters are null!
    widget_leaverequest lr = entity2.ToEntity<widget_leaverequest>();

    the lr entity is used in other operations so it has been instantiated. widget_leaverequest is my custom entity and corresponds to a class exported from the CRM system containing it.

    Tuesday, November 5, 2013 4:51 PM
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    The code looks OK. Is the widget_leaverequest entity configured to link to activities ?

    Microsoft CRM MVP - http://mscrmuk.blogspot.com/ http://www.excitation.co.uk

    • Marked as answer by J N Brand Wednesday, November 6, 2013 11:07 AM
    Wednesday, November 6, 2013 10:24 AM
    Moderator
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    The code looks OK. Is the widget_leaverequest entity configured to link to activities ?

    Microsoft CRM MVP - http://mscrmuk.blogspot.com/ http://www.excitation.co.uk

    No it wasn't! Thanks for pointing that out. I enabled it and suddenly everything works.
    Wednesday, November 6, 2013 11:06 AM