Use guid array instead of json

src/Infrastructure.Dapper/Repositories/CollectionRepository.cs

@@ -373,14 +373,13 @@ public class CollectionRepository : Repository<Collection, Guid>, ICollectionRep
 
         try
         {
-            var organizationUserIdsJson = JsonSerializer.Serialize(organizationUserIds);
             await connection.ExecuteAsync(
                 "[dbo].[Collection_CreateDefaultCollections]",
                 new
                 {
                     OrganizationId = organizationId,
                     DefaultCollectionName = defaultCollectionName,
-                    OrganizationUserIdsJson = organizationUserIdsJson
+                    OrganizationUserIds = organizationUserIds.ToGuidIdArrayTVP()
                 },
                 commandType: CommandType.StoredProcedure);
         }

src/Sql/dbo/AdminConsole/Stored Procedures/Collection_CreateDefaultCollections.sql

@@ -1,32 +1,32 @@
 -- Creates default user collections for organization users
 -- Uses semaphore table to prevent duplicate default collections at database level
--- Cascade behavior: Organization -> OrganizationUser (CASCADE) -> DefaultCollectionSemaphore (CASCADE)
--- Organization FK uses NoAction to avoid competing cascade paths
 CREATE PROCEDURE [dbo].[Collection_CreateDefaultCollections]
     @OrganizationId UNIQUEIDENTIFIER,
     @DefaultCollectionName VARCHAR(MAX),
-    @OrganizationUserIdsJson NVARCHAR(MAX)
+    @OrganizationUserIds AS [dbo].[GuidIdArray] READONLY
 AS
 BEGIN
     SET NOCOUNT ON
 
-    -- Parse JSON once into table variable with pre-generated collection IDs
-    DECLARE @OrganizationUserIds TABLE
-    (
-        [OrganizationUserId] UNIQUEIDENTIFIER,
-        [CollectionId] UNIQUEIDENTIFIER
-    );
+    DECLARE @Now DATETIME2(7) = GETUTCDATE()
 
-    INSERT INTO @OrganizationUserIds
+    -- Create temporary table to allocate collection IDs to each organizationUser
+    DECLARE @CollectionsToInsert TABLE
+                                 (
+                                     [OrganizationUserId] UNIQUEIDENTIFIER,
+                                     [CollectionId] UNIQUEIDENTIFIER
+                                 );
+
+    INSERT INTO @CollectionsToInsert
     (
         [OrganizationUserId],
         [CollectionId]
     )
     SELECT
-        CAST([value] AS UNIQUEIDENTIFIER),
+        ou.Id,
         NEWID()
     FROM
-        OPENJSON(@OrganizationUserIdsJson);
+        @OrganizationUserIds ou
 
     BEGIN TRANSACTION;
 
@@ -40,9 +40,9 @@ BEGIN
         )
         SELECT
             ou.[OrganizationUserId],
-            GETUTCDATE()
+            @Now
         FROM
-            @OrganizationUserIds ou;
+            @CollectionsToInsert ou;
 
         -- Insert collections for users who obtained semaphore entries
         INSERT INTO [dbo].[Collection]
@@ -60,13 +60,13 @@ BEGIN
             ou.[CollectionId],
             @OrganizationId,
             @DefaultCollectionName,
-            GETUTCDATE(),
-            GETUTCDATE(),
+            @Now,
+            @Now,
             1, -- CollectionType.DefaultUserCollection
             NULL,
             NULL
         FROM
-            @OrganizationUserIds ou;
+            @CollectionsToInsert ou;
 
         -- Insert collection user mappings
         INSERT INTO [dbo].[CollectionUser]
@@ -84,7 +84,7 @@ BEGIN
             0, -- HidePasswords = false
             1  -- Manage = true
         FROM
-            @OrganizationUserIds ou;
+            @CollectionsToInsert ou;
 
         COMMIT TRANSACTION;
     END TRY

test/Infrastructure.IntegrationTest/AdminConsole/Repositories/CollectionRepository/CreateDefaultCollectionsTests.cs

@@ -71,7 +71,7 @@ public class CreateDefaultCollectionsTests
     /// Test that calling CreateDefaultCollectionsAsync multiple times does NOT create duplicates
     /// </summary>
     [Theory, DatabaseData]
-    public async Task CreateDefaultCollectionsAsync_CalledMultipleTimes_DoesNotCreateDuplicates(
+    public async Task CreateDefaultCollectionsAsync_CalledMultipleTimesForSameOrganizationUser_Throws(
         IUserRepository userRepository,
         IOrganizationRepository organizationRepository,
         ICollectionRepository collectionRepository,

util/Migrator/DbScripts/2025-12-30_01_Collection_CreateDefaultCollections.sql

@@ -1,28 +1,30 @@
 CREATE OR ALTER PROCEDURE [dbo].[Collection_CreateDefaultCollections]
     @OrganizationId UNIQUEIDENTIFIER,
     @DefaultCollectionName VARCHAR(MAX),
-    @OrganizationUserIdsJson NVARCHAR(MAX)
+    @OrganizationUserIds AS [dbo].[GuidIdArray] READONLY
 AS
 BEGIN
     SET NOCOUNT ON
 
-    -- Parse JSON once into table variable with pre-generated collection IDs
-    DECLARE @OrganizationUserIds TABLE
+    DECLARE @Now DATETIME2(7) = GETUTCDATE()
+
+    -- Create temporary table to allocate collection IDs to each organizationUser
+    DECLARE @CollectionsToInsert TABLE
     (
         [OrganizationUserId] UNIQUEIDENTIFIER,
         [CollectionId] UNIQUEIDENTIFIER
     );
 
-    INSERT INTO @OrganizationUserIds
+    INSERT INTO @CollectionsToInsert
     (
         [OrganizationUserId],
         [CollectionId]
     )
     SELECT
-        CAST([value] AS UNIQUEIDENTIFIER),
+        ou.Id,
         NEWID()
     FROM
-        OPENJSON(@OrganizationUserIdsJson);
+        @OrganizationUserIds ou
 
     BEGIN TRANSACTION;
 
@@ -36,9 +38,9 @@ BEGIN
         )
         SELECT
             ou.[OrganizationUserId],
-            GETUTCDATE()
+            @Now
         FROM
-            @OrganizationUserIds ou;
+            @CollectionsToInsert ou;
 
         -- Insert collections for users who obtained semaphore entries
         INSERT INTO [dbo].[Collection]
@@ -56,13 +58,13 @@ BEGIN
             ou.[CollectionId],
             @OrganizationId,
             @DefaultCollectionName,
-            GETUTCDATE(),
-            GETUTCDATE(),
+            @Now,
+            @Now,
             1, -- CollectionType.DefaultUserCollection
             NULL,
             NULL
         FROM
-            @OrganizationUserIds ou;
+            @CollectionsToInsert ou;
 
         -- Insert collection user mappings
         INSERT INTO [dbo].[CollectionUser]
@@ -80,7 +82,7 @@ BEGIN
             0, -- HidePasswords = false
             1  -- Manage = true
         FROM
-            @OrganizationUserIds ou;
+            @CollectionsToInsert ou;
 
         COMMIT TRANSACTION;
     END TRY