I am new to CouchDb/ektorp. According to the ektorp documentation you can generate couchdb views through an annotation like this:
@View( name = "avg_sofa_size", map = "function(doc) {...}", reduce = "function(doc) {...}")
Is there a way to get only the latest revison of each doc, not by id but another attribute? <-- not java specific
And if possible only get only one doc not by id but another attributefrom that view? <-- ektorp/java
Thakns
Is there a way to get only the latest revison of each doc?
Couch always gives you the latest revision, unless you ask for a particular revision:
GET http://localhost:5984/mydb/doc-123
Returns latest revision of doc-123
GET http://localhost:5984/mydb/doc-123?rev=946B7D1C
Returns a specific revision of doc-123. (Revisions are kept by couch only for conflict resolution. They are removed during compaction and are not replicated, so you shouldn't necessarily count on them being there)
And if possible only get only one doc by id from that view
If you just want to get a document by id, there is no need to use a view. Looks like you want to do something like this with ektorp:
Sofa sofa = db.get(Sofa.class, id, rev);
Where Sofa
is a java class which extends CouchDbDocument
如另一个答案所述,如果您未明确指定修订版本,则将始终获得具有最新修订版本的文档。
Sofa sofa = db.get(Sofa.class, id);
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