add new list field in sharepoint app upgrade

I’m learning how to upgrade SharePoint App, and I met a problem when I added a new list field in the upgrade.

The document mentioned that if you added a field to a content type in the feature, you should add an AddContentTypeField element to the VersionRange section. But there is no ContentType in my app, it only has a ListDefinition. I tried to add an AddContentTypeField, unfortunately it throws exception.

So I tried another way. The document also mentioned that if you have changed a file that is referenced in an elements manifest file, you have to copy the ElementManifest element for the component from the ElementManifests section to the ApplyElementManifests section. When we added a new field to list, the Schema.xml is changed, although it’s not referenced in a ElementManifest, I still copied MyList/Elements.xml to ApplyElementManifests, so it looks like this:

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<UpgradeActions>
  <VersionRange>
    <ApplyElementManifests>
      ...
      <ElementManifest Location="MyListElements.xml" />
    </ApplyElementManifests>
  </VersionRange>
</UpgradeActions>

And it works. Hope it’s helpful.

Reference:

• How to: Update app web components in SharePoint 2013