Document Revisions

Mobile Couchbase Lite
1

Hi,

I am running CBL verion 3 on android, sync gateway version 2.8 and couchbase server enterprise version 6.6.
My sync gateway replicates json documents to/from bucket app-bucket. Few of the documents in this bucket have an unexpected structure! Although the document json is valid the hierarchy of some nodes is messed up.

I want to understand how the documentw became so messed up, so I am wondering if it is possible to get the document in each revision. As you can see below the document has 3 revisions. Is it possible to get the document json for each revision?

Regards,
Faris Ahmed

{
“meta”: {
“id”: “dff676a2-d7c2-41c1-a4f2-4d0d74b3a5d3”,
“rev”: “799871-17426eccffd000000000000000000000”,
“expiration”: 0,
“flags”: 0,
“type”: “json”
},
“xattrs”: {
“_sync”: {
“rev”: “3-d84af2e6af70dc79e5984d2cc9ce1b4cc28fb0a0”,
“sequence”: 951663952,
“recent_sequences”: [
951663760,
951663829,
951663952
],
“history”: {
“revs”: [
“1-f1bbbbf7c0d4c9739bdb7f4de4bd4843d69a61c5”,
“3-d84af2e6af70dc79e5984d2cc9ce1b4cc28fb0a0”,
“2-6e9ac131677c8b12d4696b70784d1558”
],
“parents”: [
-1,
2,
0
],
“channels”: [
[
“20191105_0000435839”
],
[
“20191105_0000435839”
],
[
“20191105_0000435839”
]
]
},
“channels”: {
“20191105_0000435839”: null
},
“cas”: “0x0000d0ffcc6e4217”,
“value_crc32c”: “0x95d079a5”,
“time_saved”: “2023-02-10T10:10:38.078290408Z”
}
}
}

4

Sync Gateway does not retain document bodies of previous revisions, with the exception of temporary backups for in-flight replications and delta sync purposes.

Can you elaborate on how the JSON document structure is unexpected?

5

The structure of some documents cannot be explained by the UPDATE statements performed by our services. Example we have two json attributes in the first level A and B like
{
A: {…}
B: {…}
}

some documents looke like this:
{
A: {
B: {…}
}
}

Our services never change documents nor create documents in which B is a child of A