CRD cannot be generated for Unstructured type

[muvaf]

We got a type that has *unstructured.Unstructured as one of its fields and we're generating CRD off of it. I am working on transition to controller-tools v0.2.0 and running into the following error:

github.com/crossplaneio/crossplane/vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured/unstructured.go:45:2: encountered struct field "Object" without JSON tag in type "Unstructured"

Looked into the source code and there really isn't a tag for Object field, however, even if I manually write the json tag, it returns the following:

github.com/crossplaneio/crossplane/vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured/unstructured.go:45:20: map values must be a named type, not *ast.InterfaceType

Is there a way to have controller-tools handle this? I imagine it's more complicated due to having interface{} as value but I'd appreciate if we can find a way for it to work. Note that it worked with version 0.1.9

You can see the ongoing work here crossplane/crossplane#665

You can see the versions used in Gopkg.toml.

To reproduce, checkout the PR and run make manifests

You can also try to have *unstructured.Unstructured typed field in any struct and try to generate CRD.

[marun]

Have you considered using a RawExtension field and adding mutator/accessor methods on the type to convert to/from unstructured?

[muvaf]

I haven't yet. If we have to change the type of the field, this will require an interface change on our CRDs though, so, it'd be awesome if we can get the Unstructured type to work somehow.

[hasheddan]

Updating the link referenced above to the *unstructure.Unstructured field.