AzureMobileClient DatabaseFirst manually create datatable fail? - azure

Question

I try to user AzureMobileClient in my XamarinForm with Database First model. For now I do not use offline sync.
So I use this script to create the table in my AZURE SQL DB:
CREATE TABLE [dbo].[TodoItems] (
-- This must be a string suitable for a GUID
[Id] NVARCHAR (128) NOT NULL,
-- These are the system properties
[Version] ROWVERSION NOT NULL,
[CreatedAt] DATETIMEOFFSET (7) NOT NULL,
[UpdatedAt] DATETIMEOFFSET (7) NULL,
[Deleted] BIT NOT NULL,
-- These are the properties of our DTO not included in EntityFramework
[Text] NVARCHAR (MAX) NULL,
[Complete] BIT NOT NULL,
);
CREATE CLUSTERED INDEX [IX_CreatedAt]
ON [dbo].TodoItems([CreatedAt] ASC);
ALTER TABLE [dbo].[TodoItems]
ADD CONSTRAINT [PK_dbo.TodoItems] PRIMARY KEY NONCLUSTERED ([Id] ASC);
CREATE TRIGGER [TR_dbo_TodoItems_InsertUpdateDelete] ON [dbo].[TodoItems]
AFTER INSERT, UPDATE, DELETE AS
BEGIN
UPDATE [dbo].[TodoItems]
SET [dbo].[TodoItems].[UpdatedAt] = CONVERT(DATETIMEOFFSET,
SYSUTCDATETIME())
FROM INSERTED WHERE inserted.[Id] = [dbo].[TodoItems].[Id]
END;
Based on the sample TodoItem provided by Azure. I can do a GetAllItems without any bug (the table is empty for now). But when I try to insert a item I got this error on my Azure backend:
{[Message, The operation failed with the following error: 'Cannot insert the value NULL into column 'CreatedAt', table 'TechCenterCentaur.dbo.TodoItems'; column does not allow nulls. INSERT fails.The statement has been terminated.'.]}
Normally Azure is supposed to take care of that automatically?
I just do that in my XF code:
TodoItem cl = new TodoItem();
cl.Name = "Test";
await _todoTable.InsertAsync(cl);
The call is well made to the backend with a TodoItem containing only Test and all the other fields are null. The exception occurred in the backend :
public async Task<IHttpActionResult> PostTodoItem(TodoItem item)
{
try
{
TodoItem current = await InsertAsync(item); //crash here
return CreatedAtRoute("Tables", new { id = current.Id }, current);
}
catch (System.Exception e)
{
throw;
}
}
Any suggestion?

Answer 1

Ok I found the solution. The problem was in my SQL table. I was missing the 2 ALTER TABLE for new GUID for ID and the CreatedDate.
Here my new script:
USE [TechCenterCentaur]
GO
/****** Object: Table [dbo].[TodoItems] Script Date: 2017-11-08 11:09:14
******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[TodoItems](
[Id] [nvarchar](128) NOT NULL,
[Text] [nvarchar](max) NULL,
[Complete] [bit] NOT NULL,
[Version] [timestamp] NOT NULL,
[CreatedAt] [datetimeoffset](7) NOT NULL,
[UpdatedAt] [datetimeoffset](7) NULL,
[Deleted] [bit] NOT NULL,
CONSTRAINT [PK_dbo.TodoItems] PRIMARY KEY NONCLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)
GO
ALTER TABLE [dbo].[TodoItems] ADD DEFAULT (newid()) FOR [Id]
GO
ALTER TABLE [dbo].[TodoItems] ADD DEFAULT (sysutcdatetime()) FOR
[CreatedAt]
GO
CREATE TRIGGER [TR_dbo_TodoItems_InsertUpdateDelete] ON [dbo].[TodoItems]
AFTER INSERT, UPDATE, DELETE AS
BEGIN
UPDATE [dbo].[TodoItems]
SET [dbo].[TodoItems].[UpdatedAt] = CONVERT(DATETIMEOFFSET,
SYSUTCDATETIME())
FROM INSERTED WHERE inserted.[Id] = [dbo].[TodoItems].[Id]
END;
GO