[sr-dev] git:5.1:63c93af1: db_mongodb: add error logger for failed query

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 5.1
Commit: 63c93af189e7e5db92a392e0d176e71bda64290e
URL: https://github.com/kamailio/kamailio/commit/63c93af189e7e5db92a392e0d176e71bda64290e

Author: kelchy <kelchy at gmail.com>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2018-03-14T11:24:06+01:00

db_mongodb: add error logger for failed query

(cherry picked from commit 2a5d66fda013197aa5fbe4828cc7f6e61a74a9d6)

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Modified: src/modules/db_mongodb/mongodb_dbase.c

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Diff:  https://github.com/kamailio/kamailio/commit/63c93af189e7e5db92a392e0d176e71bda64290e.diff
Patch: https://github.com/kamailio/kamailio/commit/63c93af189e7e5db92a392e0d176e71bda64290e.patch

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diff --git a/src/modules/db_mongodb/mongodb_dbase.c b/src/modules/db_mongodb/mongodb_dbase.c
index b1c9ac2bb7..aee5a1ba0a 100644
--- a/src/modules/db_mongodb/mongodb_dbase.c
+++ b/src/modules/db_mongodb/mongodb_dbase.c
@@ -753,6 +753,7 @@ static int db_mongodb_store_result(const db1_con_t* _h, db1_res_t** _r)
 	km_mongodb_con_t *mgcon;
 	db_mongodb_result_t *mgres;
 	const bson_t *itdoc;
+	bson_error_t error;
 
 	mgcon = MONGODB_CON(_h);
 	if(!_r) {
@@ -777,7 +778,11 @@ static int db_mongodb_store_result(const db1_con_t* _h, db1_res_t** _r)
 	if(!mongoc_cursor_more (mgres->cursor)
 			|| !mongoc_cursor_next (mgres->cursor, &itdoc)
 			|| !itdoc) {
-		LM_DBG("no result from mongodb\n");
+		if (mongoc_cursor_error (mgres->cursor, &error)) {
+			LM_DBG("An error occurred: %s\n", error.message);
+		} else {
+			LM_DBG("no result from mongodb\n");
+		}
 		return 0;
 	}
 	/* first document linked internally in result to get columns */