v7 to v8 migration results in empty umbracomediaversion - Using Umbraco and getting started

Simon Dingley 1474 posts 3431 karma points c-trib

Jun 12, 2023 @ 10:10

v7 to v8 Migration Results in Empty umbracoMediaVersion Table

After much work trying to migrate legacy property data from a v7 site to a v8 site, I am very close now to being able to then move from v8 to v10. However, there is one major issue still to resolve. After the v8 migration is completed I am left with no accessible media items. The media tree is populated fine but none of the media can be accessed and that is because there are no records in the umbracoMediaVersion table.

Here is what I believe to be the related migration

As far as I can see there are no related errors thrown during the migration yet repeated attempts at the process result in the same outcome.

If I execute the following query (modified from the migration to be SELECT rather than UPDATE) then I get back what I would expect to be in the table after the migration completes:

SELECT v.id,m.mediaPath
FROM cmsMedia m
JOIN cmsContentVersion v on m.versionId = v.versionId
JOIN umbracoNode n on v.contentId=n.id
WHERE n.nodeObjectType='B796F64C-1F99-4FFB-B886-4BF4BC011A9C'

Has anyone else experienced this or could shed some light on why it might be dropping the rows during the migration?

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Simon Dingley 1474 posts 3431 karma points c-trib

Jun 13, 2023 @ 08:48

What appears to be the issue is that there are no content versions in the v8 umbracoContentVersion table that relate to media items.

If I execute the following query on my v7 database I get results as expected:

SELECT 
  cv.id, 
  cm.mediaPath 
FROM 
  [Umbraco_v7].[dbo].cmsMedia AS cm 
  INNER JOIN [Umbraco_v7].[dbo].cmsContentVersion AS cv ON cm.versionId = cv.VersionId 
  INNER JOIN [Umbraco_v7].[dbo].umbracoNode ON cm.nodeId = [Umbraco_v7].[dbo].umbracoNode.id 
WHERE 
  (
    umbracoNode.nodeObjectType = 'B796F64C-1F99-4FFB-B886-4BF4BC011A9C'
  )

If I then execute the following query on the migrated v8 database I get no results so something is going wrong somewhere else in the migration process.

SELECT 
  cv.id, 
  cm.mediaPath 
FROM 
  [Umbraco_v7].[dbo].cmsMedia AS cm 
  INNER JOIN [Umbraco_v7].[dbo].cmsContentVersion AS cv ON cm.versionId = cv.VersionId 
  INNER JOIN [Umbraco_v7].[dbo].umbracoNode ON cm.nodeId = [Umbraco_v7].[dbo].umbracoNode.id 
WHERE 
  (
    umbracoNode.nodeObjectType = 'B796F64C-1F99-4FFB-B886-4BF4BC011A9C'
  ) 
  AND EXISTS (
    SELECT 
      1 
    FROM 
      [Umbraco_v8].[dbo].[umbracoContentVersion] ucv 
    WHERE 
      ucv.id = cv.id
  );

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Simon Dingley 1474 posts 3431 karma points c-trib

Jun 13, 2023 @ 11:38

Whilst it's not ideal I have managed to put together some scripts to insert the missing content versions and media versions until I can work out what is going wrong in the migration process.

The following script will select the missing content versions from the v7 database and insert them into the umbracoContentVersions table in the v8 database:

-- Enable identity insert
SET IDENTITY_INSERT [Umbraco_v8].[dbo].[umbracoContentVersion] ON;

INSERT INTO [Umbraco_v8].[dbo].[umbracoContentVersion] (
  [id], [nodeId], [VersionDate], [text], 
  [current], [userId], [preventCleanup]
) 
SELECT 
  cv.id, 
  cv.ContentId AS nodeId, 
  cv.VersionDate, 
  un.[text],
  1,
  ISNULL(uu.id, -1), -- if no matching user id then use the admin id of -1
  0 
FROM 
  [Umbraco_v7].[dbo].cmsMedia AS cm 
  INNER JOIN [Umbraco_v7].[dbo].cmsContentVersion AS cv ON cm.versionId = cv.VersionId 
  INNER JOIN [Umbraco_v7].[dbo].umbracoNode un ON cm.nodeId = un.id
  LEFT JOIN [Umbraco_v8].[dbo].[umbracoUser] uu ON un.nodeUser = uu.id
WHERE 
  (
    un.nodeObjectType = 'B796F64C-1F99-4FFB-B886-4BF4BC011A9C'
  ) 
  AND NOT EXISTS (
    SELECT 
      1 
    FROM 
      [Umbraco_v8].[dbo].[umbracoContentVersion] ucv 
    WHERE 
      ucv.id = cv.id
  ) 

-- Disable identity insert  
SET IDENTITY_INSERT [Umbraco_v8].[dbo].[umbracoContentVersion] OFF;

This should then be followed up with the following query to insert the missing media versions into the v8 umbracoMediaVersion table.

INSERT INTO Umbraco_v8.dbo.umbracoMediaVersion (id, [path])
SELECT        cv.id, cm.mediaPath
FROM            Umbraco_v7.dbo.cmsMedia AS cm INNER JOIN
                         Umbraco_v7.dbo.cmsContentVersion AS cv ON cm.versionId = cv.VersionId INNER JOIN
                         umbracoNode ON cm.nodeId = umbracoNode.id
WHERE        (umbracoNode.nodeObjectType = 'B796F64C-1F99-4FFB-B886-4BF4BC011A9C')
AND EXISTS (
    SELECT 1
    FROM Umbraco_v8.dbo.umbracoContentVersion ucv
    WHERE cv.id = cv.id
);

I can now load the media nodes in the v8 back office but still I am missing the images themselves and any property data at this stage which makes me think that also did not make it through the migration.

Strange that there were no reported errors from Umbraco during the upgrade/migration when in reality it should have failed on something like this and not just dumped the content.

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v7 to v8 Migration Results in Empty umbracoMediaVersion Table