diff options
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/objectstore.py | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/backends/objectstore.py b/backends/objectstore.py index 5bd864c8..298bdda3 100644 --- a/backends/objectstore.py +++ b/backends/objectstore.py @@ -1,5 +1,6 @@ import uuid from u1db.backends import CommonBackend +from u1db import errors from soledad import SyncLog, TransactionLog from soledad.backends.leap import LeapDocument @@ -46,8 +47,21 @@ class ObjectStore(CommonBackend): raise errors.InvalidDocId() self._check_doc_id(doc.doc_id) self._check_doc_size(doc) - # put the document - doc.rev = self._allocate_doc_rev(doc.rev) + # check if document exists + old_doc = self._get_doc(doc.doc_id, check_for_conflicts=True) + if old_doc and old_doc.has_conflicts: + raise errors.ConflictedDoc() + if old_doc and doc.rev is None and old_doc.is_tombstone(): + new_rev = self._allocate_doc_rev(old_doc.rev) + else: + if old_doc is not None: + if old_doc.rev != doc.rev: + raise errors.RevisionConflict() + else: + if doc.rev is not None: + raise errors.RevisionConflict() + new_rev = self._allocate_doc_rev(doc.rev) + doc.rev = new_rev self._put_doc(doc) # update u1db generation and logs new_gen = self._get_generation() + 1 @@ -69,7 +83,7 @@ class ObjectStore(CommonBackend): new_rev = self._allocate_doc_rev(doc.rev) doc.rev = new_rev doc.make_tombstone() - self._put_doc(olddoc) + self._put_doc(doc) return new_rev # start of index-related methods: these are not supported by this backend. @@ -171,9 +185,15 @@ class ObjectStore(CommonBackend): self._put_doc(doc) def _get_u1db_data(self, u1db_data_doc_id): + """ + Fetch u1db configuration data from backend storage. + """ NotImplementedError(self._get_u1db_data) def _set_u1db_data(self): + """ + Save u1db configuration data on backend storage. + """ doc = self._factory(doc_id=self.U1DB_DATA_DOC_ID) doc.content = { 'transaction_log' : self._transaction_log.log, 'sync_log' : self._sync_log.log, |