Overriding dublincore is evil 🙂
Dublincore is the schema that store all the mandatory fields of Nuxeo Document. This is a standard schema, if you want to see a bit more on this point go there.
But that's not only for that. for maintenance of your code, if we update something on this part of our code, you will have to take care of our updates to push them into your code.
And last, but no least your error may happens because when you has overridden the schema you remove some fields but you didn't update the layout that wait for this field...
Anyway I hope, I convince you to not go to this way.
A better way is to:
- Create your own schema
- Override File and Folder docType definition to just add this new schema. As all documents extends that docTypes you must have all Doc Type implementing your schema.
- Override the "dublincore" layout to add your widget (mmmh... ) or create your own layout and add it in all your document presentation definition.
To override the core type definition, I think you just have to do something like:
<require>org.nuxeo.ecm.core.CoreExtensions</require>
<extension target="org.nuxeo.ecm.core.schema.TypeService"
point="configuration">
<doctype name="Folder" extends="Document">
<schema name="myschema"/>
</doctype>
<doctype name="File" extends="Document">
<schema name="myschema"/>
</doctype>
...
To override dublincore layout, you will have something like that:
<require>org.nuxeo.ecm.platform.forms.layouts.webapp</require>
<extension target="org.nuxeo.ecm.platform.forms.layout.WebLayoutManager"
point="layouts">
<layout name="dublincore">
I hope that will help you.
