database_from_path

# File activerecord/lib/active_record/connection_adapters/connection_specification.rb, line 96
        def database_from_path
          if @authority && @adapter == 'sqlite3'
            # 'sqlite3:///foo' is relative, for backwards compatibility.

            database_name = uri.path.sub(%{^/}, "")

            msg = "Paths in SQLite3 database URLs of the form `sqlite3:///path` will be treated as absolute in Rails 4.2. "                "Please switch to `sqlite3:#{database_name}`."
            ActiveSupport::Deprecation.warn(msg)

            database_name

          elsif @adapter == 'sqlite3'
            # 'sqlite3:/foo' is absolute, because that makes sense. The
            # corresponding relative version, 'sqlite3:foo', is handled
            # elsewhere, as an "opaque".

            uri.path
          else
            # Only SQLite uses a filename as the "database" name; for
            # anything else, a leading slash would be silly.

            uri.path.sub(%{^/}, "")
          end
        end