Question
Can someone give example of using App platform's environmental variables in node.js
- Posted on February 4, 2021
- Node.jsDigitalOcean App Platform
Asked by jak6jak
I am using Digital Ocean’s app platform to host a NodeJS app. I do not understand the documentation for using environmental variables within my NodeJS code. https://www.digitalocean.com/docs/app-platform/how-to/use-environment-variables/#define-build-time-environment-variables when I try to add the environmental variable like I think the documentation wants me to I get a syntax error: mongoose.connect(${_self.DATABASE_URL}, {useNewUrlParser: true}); What is the correct usage?
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👋🏼 @jak6jak
The “bindable environment variables” are available for use in the app config. You’ll still need to add the actual environment variables to your app/component config, but you can use the templates as part of the values.
For example, if you have an app with a Node.js Service component and a database component, you can add an environment variable to the service component with:
DATABASE_URL${db.DATABASE_URL}${db.DATABASE_URL}will be replaced by the database connection string before it is passed to the Node.js app. Then, in your code, you can use it just like a regular environment variable like so:The
dbin${db.DATABASE_URL}must match the database component’s name, so if it’s different, you’ll need to replace it. You can find the component’s name in the control panel under Apps -> Components -> Info.If you haven’t connected a database to your app yet, see How to Manage Databases in App Platform.