versions: calculate record's active versions

* closes zenodo/rdm-project#515

invenio_drafts_resources/records/api.py

@@ -27,6 +27,9 @@
 from invenio_db import db
 from invenio_pidstore.models import PIDStatus
 from invenio_pidstore.providers.recordid_v2 import RecordIdProviderV2
+from invenio_rdm_records.records.systemfields.deletion_status import (
+    RecordDeletionStatusEnum,
+)
 from invenio_records.systemfields import ModelField
 from invenio_records_resources.records import Record as RecordBase
 from invenio_records_resources.records.systemfields import PIDField, PIDStatusCheckField
@@ -90,6 +93,14 @@ class Record(RecordBase):
     #: Version relationship
     versions = VersionsField(create=True, set_latest=True)
 
+    @property
+    def versions_count(self):
+        """Get number of record's active versions"""
+        records = list(
+            self.get_record_versions(parent_id=self.parent.id, include_deleted=False)
+        )
+        return len(records)
+
     @classmethod
     def get_records_by_parent(cls, parent, with_deleted=True, ids_only=False):
         """Get all sibling records for the specified parent record."""
@@ -106,6 +117,20 @@ def get_records_by_parent(cls, parent, with_deleted=True, ids_only=False):
                     for rec_model in rec_models
                 )
 
+    @classmethod
+    def get_record_versions(cls, parent_id, include_deleted=True):
+        """Get record's versions."""
+        from invenio_rdm_records.records.models import RDMRecordMetadata
+
+        with db.session.no_autoflush:
+            rec_models = cls.model_cls.query.filter_by(parent_id=parent_id)
+            if not include_deleted and cls.model_cls is RDMRecordMetadata:
+                rec_models = rec_models.filter_by(
+                    deletion_status=RecordDeletionStatusEnum.PUBLISHED.value
+                )
+
+            return (rec_model.id for rec_model in rec_models)
+
     @classmethod
     def get_latest_by_parent(cls, parent, id_only=False):
         """Get the latest record for the specified parent record.

invenio_drafts_resources/records/systemfields/versions.py

@@ -29,6 +29,7 @@ def __init__(self, record, dump=None):
         """Initialize the versions manager."""
         self._record = record
         self._state = None
+        self.versions_count = None
         if dump is not None:
             self.load(dump)
 
@@ -88,6 +89,18 @@ def is_latest(self):
         """Check if the record/draft id is the latest published record id."""
         return self.latest_id == self._record.id
 
+    @property
+    def versions_count(self):
+        """Get number of record's active versions."""
+        if self._versions_count is None:
+            self._versions_count = self._record.versions_count
+        return self._versions_count
+
+    @versions_count.setter
+    def versions_count(self, value):
+        """Set number of record's active versions."""
+        self._versions_count = value
+
     @property
     def is_latest_draft(self):
         """Check if the record/draft id is the latest draft id."""
@@ -153,6 +166,7 @@ def dump(self):
             next_draft_id=self.next_draft_id,
             is_latest=self.is_latest,
             is_latest_draft=self.is_latest_draft,
+            versions_count=self.versions_count,
             index=self.index,
         )
 
@@ -166,14 +180,16 @@ def load(self, dump):
         )
         if self.index != dump["index"]:
             self._record.model.index = dump["index"]
+        self.versions_count = dump.get("versions_count", None) or dump["index"]
 
     def __repr__(self):
         """Return repr(self)."""
         return (
             f"<{type(self).__name__} (parent_id: {self.parent_id}, "
             f"index: {self.index}, latest_id: {self.latest_id}, "
             f"latest_index: {self.latest_index}, "
-            f"next_draft_id: {self.next_draft_id})>"
+            f"next_draft_id: {self.next_draft_id}, "
+            f"versions_count: {self.versions_count})>"
         )
 
 

invenio_drafts_resources/services/records/schema.py

@@ -19,6 +19,7 @@ class VersionsSchema(Schema):
     is_latest = fields.Boolean()
     is_latest_draft = fields.Boolean()
     index = fields.Integer()
+    versions_count = fields.Integer()
 
 
 class ParentSchema(Schema):