model/model_viz: use OrderedTree[MConcern]

[nit.git] / lib / mongodb / mongodb.nit

diff --git a/lib/mongodb/mongodb.nit b/lib/mongodb/mongodb.nit
index db83acd..1e9b9bd 100644 (file)
--- a/lib/mongodb/mongodb.nit
+++ b/lib/mongodb/mongodb.nit
@@ -256,6 +256,7 @@ class MongoClient
                assert is_alive
                var res = new Array[String]
                var nas = native.database_names
+               if nas == null then return res
                var i = 0
                var name = nas[i]
                while not name.address_is_null do
@@ -360,6 +361,7 @@ class MongoDb
                assert is_alive
                var res = new Array[String]
                var nas = native.collection_names
+               if nas == null then return res
                var i = 0
                var name = nas[i]
                while not name.address_is_null do
@@ -599,6 +601,7 @@ class MongoCollection
        fun find(query: JsonObject): nullable JsonObject do
                assert is_alive
                var c = native.find(query.to_bson.native)
+               assert is_alive # FIXME used to avoid segfault (so `self` isn't garbage collected to soon)
                if c == null then return null
                var cursor = new MongoCursor(c)
                if cursor.is_ok then