Description Usage Arguments Details Value See Also Examples
Retrieve an server error string from a mongo connection object.
1 |
mongo |
(mongo) a mongo connection object. |
mongo.find()
, mongo.find.one()
,
mongo.index.create()
set or clear this error string depending
on whether they are successful or not.
mongo.get.last.err()
and mongo.get.prev.err()
both set or clear this error string according to what the server reports.
(string) Server error string
mongo.get.server.err
,
mongo.get.last.err
,
mongo.get.prev.err
,
mongo.find
,
mongo.find.one
,
mongo.index.create
,
mongo.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | mongo <- mongo.create()
if (mongo.is.connected(mongo)) {
# construct a query containing invalid operator
buf <- mongo.bson.buffer.create()
mongo.bson.buffer.start.object(buf, "age")
mongo.bson.buffer.append(buf, "$bad", 1L)
mongo.bson.buffer.finish.object(buf)
query <- mongo.bson.from.buffer(buf)
result <- mongo.find.one(mongo, "test.people", query)
if (is.null(result)) {
print(mongo.get.server.err(mongo))
print(mongo.get.server.err.string(mongo))
}
}
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