List Fields not showing in Add, Edit and display forms after migration

Background:

We have completed a tool based SharePoint migration for a client which was from SharePoint 2010 to SharePoint online, during the migration we got some hurdles which is because of custom features, custom list columns, deprecated list & site templates and invalid data but at the we were good to migrate all the content to SharePoint Online which also involved some manual effort.

Issue:

Users started using SharePoint online portal and also have reported some issues which we resolved. We have been reported an issue by end users for task list where having 15 custom columns and are shown in all default forms (Add/Edit/View) in SharePoint 2010. All data is migrated to the list and users can view them through list views but when they click any of them to View details or Edit they can’t see all the columns as they can see in SharePoint 2010 environment. They reported that they can’t see all fields in any of the three forms (Add/Edit/View).

Solution:

At first this looks to be the content type issue which is not set default but there was not content type included, only default task content type was used. I can see all the custom fields the task list through list settings. Then I have tried adding columns to forms using SharePoint designer but no success and I do not want to create custom views.

Then I come to the list settings again, enabled Content type on the list and I can see that custom fields are not bind with or Used in the Task content type, and this was the point why custom fields are not showing up in all three forms.

Whenever you create a new custom field to a list, it also get added to the default content type, but now we already have the custom fields which are not part of the  default content type (i.e. Task content type).

The steps to add them to the default content type are quite easy, click on the default content type and it will take you the content type detail page or content type setting  page (for current list only), below the fields there is a link with text “Add from existing site or list columns”. This link will lead you to the add columns page of list content type, Select columns from List Columns and you can see listing of all custom columns. Add them to the content type and now you can see them in all three forms.

I set the ordering of fields similar to SharePoint 2010 list and now things are working fine. J

List Fields not showing default forms

In below image, you can see list of columns but these are not part of default content type.

List Columns

Add columns to task list content type through below link, and this will start showing columns in all forms. Click on the “Add from existing site or list settings”

Add columns to default content type