new file: content/2018-06-15-pyramid-sqlalchemy-bootstrap-console-script-with-transaction-manager.rst

content/2018-06-15-pyramid-sqlalchemy-bootstrap-console-script-with-transaction-manager.rst

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+Pyramid SQLAlchemy bootstrap console script with transaction.manager
+#########################################################################
+
+:author: Russell Ballestrini
+:slug: pyramid-sqlalchemy-bootstrap-console-script-with-transaction-manager
+:date: 2018-06-15 10:54
+:tags: Code
+:status: published
+
+So I've struggled for a while with the best way to properly setup a console script for my SQLAlchemy Pyramid apps.
+
+I use the cookie cutter to setup my projects and as such, I do not have a global (and the importable) DBSession object. Instead my database session is attached to the request when it is created.
+
+Anyways, here is my recipe:
+
+.. code-block:: python
+    
+    import argparse
+
+    from pyramid.paster import bootstrap, setup_logging
+    
+    from remarkbox.models import invalidate_all_node_cache_objects
+    
+    
+    def get_arg_parser():
+        parser = argparse.ArgumentParser(
+            description="Invalidate all NodeCache objs to force recomputation."
+        )
+        parser.add_argument("-c", "--config", default="development.ini")
+        parser.add_argument("-d", "--debug", action="store_true", default=False)
+        return parser
+    
+    
+    def main():
+        parser = get_arg_parser()
+        args = parser.parse_args()
+    
+        if args.debug:
+            setup_logging(args.config)
+    
+        # use bootstrap context manager to prepare app and request,
+        # next use the resulting request's transaction manager!
+        with bootstrap(args.config) as env, env["request"].tm:
+            request = env["request"]
+            invalidate_all_node_cache_objects(request.dbsession)