Using Database Toolbox Interface for MongoDB in a Matlab Web App

Hi everyone,

I want to implement a simple GUI in Matlab's App Designer which acceses a MongoDB using the Database Toolbox Interface for MongoDB.

This works fine in the App Designer. Next, I compiled my GUI to a Matlab Web App. No error occurred during the compilation. However, an error is thrown during the runtime of the web app.

The error occurs when I try to connect to the database. I suspect that I need to somehow add the interface for MongoDB into the package to compile. But I have no idea how to do that, because only a mongodb.mlpkginstall can be downloaded in the file exchange.

Does anyone have any idea where the problem comes from and how to solve it?

Thank you all in advance!!!!

---

Here the simple code:

server = "111.222.33.44";
port = 27017;
dbname = "test";

app.conn = mongo(server,port,dbname);

In the Web App I got the following error message:

line 65 in my web app is app.conn = mongo(server, port, dbname)

Answer 1

[Kojiro Saito]

JDBC driver of Mongo DB might not be included in your package file.

Aftere installing mlpkginstall file, the JDBC driver will be found in

C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mongodb.instrset\MongoDriver

as of Windows OS.

Please include this folder in "Files required for your app to run" setting of Web App Compiler, then package it again.

[Christian Idzik]

Thanks. Where can the driver be found on Linux systems?

I couldn't find in /usr/local/MATLAB/R2020b

[Christian Idzik]

Ah okay I found out that you can type matlabshared.supportpkg.getSupportPackageRoot in the command line to get the location of the SupportPackages

[Kojiro Saito]

Great! Sorry, I didn't know you're using Linux.