func (api *API) createParamsStorageAttachment(si params.StorageDetails, sa state.StorageAttachment) (params.StorageDetails, error) {
result := params.StorageDetails{Status: "pending"}
result.StorageTag = sa.StorageInstance().String()
if result.StorageTag != si.StorageTag {
panic("attachment does not belong to storage instance")
}
result.UnitTag = sa.Unit().String()
result.OwnerTag = si.OwnerTag
result.Kind = si.Kind
result.Persistent = si.Persistent
// TODO(axw) set status according to whether storage has been provisioned.
// This is only for provisioned attachments
machineTag, err := api.storage.UnitAssignedMachine(sa.Unit())
if err != nil {
return params.StorageDetails{}, errors.Annotate(err, "getting unit for storage attachment")
}
info, err := common.StorageAttachmentInfo(api.storage, sa, machineTag)
if err != nil {
if errors.IsNotProvisioned(err) {
// If Info returns an error, then the storage has not yet been provisioned.
return result, nil
}
return params.StorageDetails{}, errors.Annotate(err, "getting storage attachment info")
}
result.Location = info.Location
if result.Location != "" {
result.Status = "attached"
}
return result, nil
}