TL; DR 琥珀色（Granite ORM）在确定用于Postgres模式的驱动程序时遇到问题。
我有一个最近部署到Heroku的应用程序。遵循这些文档，我可以将默认的脚手架应用程序部署到Heroku。
进一步构建应用程序，我在数据库中添加了一个数据库。为了部署它，我意识到我必须以某种方式将DATABASE_URL添加到Amber中。为此，我运行amber e对生产细节进行加密，将带有ENV["DATABASE_URL"]的数据库URL添加到Yaml文件中，然后将加密的生产数据库上传到Heroku。
加载应用程序时，出现以下错误？有什么想法吗？
ERROR: no driver was registered for the schema "", did you maybe forget to require the database driver? (ArgumentError)
from ???
from /tmp/crystal/share/crystal/src/hash.cr:152:5 in 'database'
from /tmp/build_7b930c5cce776ceed341783001cb3a8d/lib/db/src/db/query_methods.cr:38:7 in '->'
from /tmp/build_7b930c5cce776ceed341783001cb3a8d/lib/granite/src/granite/collection.cr:255:3 in 'call'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in 'call'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in 'call'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in 'call'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in 'call'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in 'call'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in '???'
from /tmp/crystal/share/crystal/src/http/server/handler.cr:24:7 in 'call_next'
from /tmp/build_7b930c5cce776ceed341783001cb3a8d/lib/amber/src/amber/pipes/powered_by_amber.cr:6:9 in '???'
from /tmp/crystal/share/crystal/src/http/server/request_processor.cr:39:11 in 'process'
from /tmp/crystal/share/crystal/src/fiber.cr:255:3 in '???'
from ???
我当前正在使用