Updating embedded documents mongodb

26-Nov-2015 10:18

Although it should work, it is recommended to use non-special characters for document IDs.

One special case is _design/ documents, those accept either / or %2F for the / after as described below) is sent using this option, it is not immediately written to disk.The official documentation has moved to The transition is not 100% complete, but be seen as having the latest info.In some cases, the wiki still has some more or older info on certain topics inside Couch DB. Doc IDs are case-sensitive string identifiers that uniquely identify a document.Two documents cannot have the same identifier in the same database, they are considered the same document.Document IDs don't have restrictions on what characters can be used.If you delete using the DELETE method above, only the _id, _rev and a deleted flag are preserved.

If you deleted a document by adding "_deleted":true then all the fields of the document are preserved.

This is to allow, for example, recording the time you deleted a document, or the reason you deleted it.

Instead it is stored in memory on a per-user basis for a second or so (or the number of docs in memory reaches a certain point).

After the threshold has passed, the docs are committed to disk.

Instead of waiting for the doc to be written to disk before responding, Couch DB sends an HTTP is not suitable for crucial data, but it ideal for applications like logging which can accept the risk that a small proportion of updates could be lost due to a crash.

Docs in the batch can also be flushed manually using the Note: Deleted documents remain in the database forever, even after compaction, to allow eventual consistency when replicating.