I download metabase code from github,and run it on my computer, the version is 0.41.5. when I add new database, I can`t found mongoDB database type. like this
did I missing something? please help me 
Hi @jiaxing
Like I already linked, https://github.com/metabase/metabase/wiki/Metabase-Backend-Dev-Secrets, if you are not building an uberjar, then you'll need to tell which drivers should be included.
So either include those driver, or build an uberjar.
sorry I am a web developer and this is my first time to use metabase; I can`t read the documentation 
. so I repeat the question 
@jiaxing Please read all of this:
https://www.metabase.com/docs/latest/developers-guide/build.html
https://www.metabase.com/docs/latest/developers-guide/devenv.html
And then set this environment variable before trying to start Metabase:
export DRIVERS=h2,postgres,mysql,mongo
There's nothing in your frontend development that requires Mongo, so you can work without it and then when you're done you can build a final uberjar for distribution.
where can I set the environment variable
@jiaxing Like I said, you don't need Mongo to do your frontend changes.
Do this: https://www.metabase.com/docs/latest/developers-guide/devenv.html#building-drivers
If that doesn't work, then you should just build Metabase, when you're done with your frontend changes:
https://www.metabase.com/docs/latest/developers-guide/build.html#build-metabase-uberjar
And if you are still having problems, then you'll likely need to get help from a backend developer.
thank you so much!! it is work!. after I build drivers like this ./bin/build-driver.sh mongo, and I start Metabase, the web is white blank. finally found that port 8080 was occupied thank you again!