Fix SqliteHook compatibility with SQLAlchemy engine

airflow/providers/sqlite/hooks/sqlite.py

@@ -36,6 +36,12 @@ def get_conn(self) -> sqlite3.dbapi2.Connection:
         conn = sqlite3.connect(airflow_conn.host)
         return conn
 
+    def get_uri(self) -> str:
+        """Override DbApiHook get_uri method for get_sqlalchemy_engine()"""
+        conn_id = getattr(self, self.conn_name_attr)
+        airflow_conn = self.get_connection(conn_id)
+        return f"sqlite:///{airflow_conn.host}"
+
     @staticmethod
     def _generate_insert_sql(table, values, target_fields, replace, **kwargs):
         """

tests/providers/sqlite/hooks/test_sqlite.py

@@ -21,6 +21,8 @@
 from unittest import mock
 from unittest.mock import patch
 
+import sqlalchemy
+
 from airflow.models import Connection
 from airflow.providers.sqlite.hooks.sqlite import SqliteHook
 
@@ -126,3 +128,13 @@ def test_generate_insert_sql_replace_true(self):
         )
 
         assert sql == expected_sql
+
+    def test_sqlalchemy_engine(self):
+        """Test that the sqlalchemy engine is initialized"""
+        conn_id = 'sqlite_default'
+        hook = SqliteHook(sqlite_conn_id=conn_id)
+        engine = hook.get_sqlalchemy_engine()
+        assert isinstance(engine, sqlalchemy.engine.Engine)
+        assert engine.name == 'sqlite'
+        # Assert filepath of the sqliate DB is correct
+        assert engine.url.database == hook.get_connection(conn_id).host