References in a blueprint

envVars:
  - key: DATABASE_URL
    fromDatabase: { name: app-db, property: connectionString }   # ${{datastore.app-db.connectionString}}
  - key: API_HOST
    fromService: { type: pserv, name: api, property: hostport }  # ${{service.api.hostport}}

In a blueprint, you do not write ${{…}}. You write fromDatabase or fromService. Ferry makes the reference from it. The comment on each line shows the result.

Where to read moreCopy Anchor Link

• envVars entries: each form of a variable in a blueprint
• Reference properties: the properties that fromDatabase and fromService accept