On Wed, 11 Sep 2013 17:10:48 GMT, Sönke Ludwig wrote:

On Wed, 11 Sep 2013 16:49:14 GMT, Craig Dillabaugh wrote:

On Wed, 11 Sep 2013 02:26:25 GMT, David Eagen wrote:

On Tue, 10 Sep 2013 17:50:57 GMT, Craig Dillabaugh wrote:

  • MongoClient mongo_client;
  • auto imagelst = mongoclient.getCollection("mydb.images");

You need to get your MongoClient object from the connectMongoDB() function like this:

MongoClient mongo_client = connectMongoDB(url);

The url should be something like: mongodb://localhost/mydb

This doesn't seem to work either. It hangs my server. To test things out I have the function: 

void listImages(HTTPServerRequest req, HTTPServerResponse res)
{
  logInfo("Entering list images.");
  g_mongo_client = connectMongoDB("mongodb://localhost");

  auto images = g_mongo_client.getCollection("mydb.images");
  foreach( img; images.find() ) {
    logInfo("Image: %s", img.toJson() );
   }

  res.renderCompat!("images.dt", HTTPServerRequest, "req")(req);
}

If I comment out the connectMongoDB() line the server will list all the records in "mydb.images", but it still hangs/crashes when trying to generate the images.dt template. If I add a connectMongoDB line to my template then it hangs, if I use the same code as I have in my listImages(...) function, without connectMongoDB(), then it crashes as described in the original post.

*Entering list images" always gets logged, so I am assuming that it is connectMongoDB() that causes it to hang.

I wouldn't really explain why it hangs, but it may be that you hit https://github.com/rejectedsoftware/vibe.d/issues/289 and need to replace "localhost" with "127.0.0.1". Without a connectMongoDB call it would be a mystery, though, if it still works. g_mongo_client would contain a null pointer after all.

If you are on Windows, you can also add "subConfigurations": {"vibe-d": "win32"} to your package.json to use the win32 driver, which doesn't have the "localhost" issue.

It appears to the localhost issue (I am on Linux). The following now works in my images.dt template. 

  - MongoClient mongoclient = connectMongoDB("127.0.0.1");
  - auto image_lst = mongoclient.getCollection("cast-tiles.images");

And the reason my code was working in my app.d is that I made a call elsewhere to connectMongoDB("127.0.0.1") on my global g_mongo_client variable (hangs head). Thus using g_mongo_client.getCollection() worked fine because g_mongo_client was already initialized, but the call to connectMongoDB("localhost") hung likely due to the bug you mentioned.