Re: [sqlalchemy] Doing reflection with multiple remote databases.
The point is in that just some of them are identical, some others not, its more like sets of group models.One model is valid for 300 databases, another one for another 500 etc... So i need a to have a fast way that will compare each database across the rest to see with one can be shared and then of course build it. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/YKsvHyl1qCEJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] Doing reflection with multiple remote databases.
if you want some code you can adapt to compare schemas take a look at the autogenerate code in Alembic: https://bitbucket.org/zzzeek/alembic/src/b0118a7df6ec71597b3b7849183768e4d59c9c49/alembic/autogenerate.py?at=default On Jan 16, 2013, at 5:48 AM, Hetii wrote: The point is in that just some of them are identical, some others not, its more like sets of group models.One model is valid for 300 databases, another one for another 500 etc... So i need a to have a fast way that will compare each database across the rest to see with one can be shared and then of course build it. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/YKsvHyl1qCEJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] Doing reflection with multiple remote databases.
On Tue, Jan 15, 2013 at 8:48 PM, Hetii ghet...@gmail.com wrote: Even when i dump all of them into declarative base model, its still huge amount of data that need to be parsed and loaded. I want to ask if its possible to share table/column definition across different database models to reduce amount of used resources? Even if you can't share the objects themselves (not sure you can, you probably can't), you can share the code that generates them. Remember python is dynamic, and class blah is code that actually creates a class object: def init(): class Blah class Blah return locals() globals().update(init()) ^ You can call that init function as many times as you want. I use something like that to map two identical databases (master and replica) into two namespaces I can pick depending on the task. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
[sqlalchemy] Connections and Postgres
Hi all! I'm using SQLAlchemy to connect to a Postgres db on several Flask web applications, and I'm investigating connection leaking on them. From running ps -ef I can see that, immediately after I start my web server, I immediately get one idle connection per web server worker process (gunicorn worker). Now, on one app I'm not using Flask-SQLAlchemy, but scoped sessions directly. On the other I am using Flask-SQLAlchemy. Initially I thought it was me not properly removing all the sessions after use, but the fact that the connections are up immediately after I start the servers, before any queries are made, is puzzling me... The fact that it happens with Flask-SQLAlchemy puzzles me even more since it was supposed to take care of removing sessions (even though, in this case, no request is actually made *before* the connection shows up on ps -ef). Any thoughts on what might happening? -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/adroM3iiL6cJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] Define a custom collection
Done. https://bitbucket.org/sqlalchemy/sqlalchemy/pull-request/36/fix-the-collectionlink-decorator http://www.sqlalchemy.org/trac/ticket/2653 http://www.sqlalchemy.org/trac/ticket/2654 -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/omr9KtOXjukJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] Text column not populating on object correctly
On Jan 16, 2013, at 11:42 PM, jgruber wrote: I'm using SQLAlchemy 7.8 with sqlite3. I have a Column setup in my schema of type Text, defined as follows: marker_data = Column(Text(length=None, convert_unicode=False, assert_unicode=None), nullable=False, unique=True) I create my object and I see the SQL generated just fine. I have an external sqlite client looking at the data and I see the table row populate correctly with the marker_data column when I create objects through SQLAlchemy and commit them. However, the marker_data attribute on my python object for the Text fields is set to 'None' as soon as I commit or read it again from the db. The text I put in is about 1700 characters and has '\n' characters in it. Removing the '\n' characters didn't change the behaviour. When I use the engine by itself and do a raw query with engine.execute() the tuple data for the Text field comes back just fine. It seems to be the ORM populating my object's marker_data attribute which isn't working? Any ideas? How do I troubleshoot this further? there's something you're doing that is either setting this field to None or making it appear that way. would need more details (like a test case) to see exactly what it is. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] Text column not populating on object correctly
I complete ripped up my code.. Working back through an argument to __init__ the object which inherits from my data model.. DUH! Thanks.. found it. You were create =None killed it.. John On Wednesday, January 16, 2013 10:56:44 PM UTC-6, Michael Bayer wrote: On Jan 16, 2013, at 11:42 PM, jgruber wrote: I'm using SQLAlchemy 7.8 with sqlite3. I have a Column setup in my schema of type Text, defined as follows: marker_data = Column(Text(length=None, convert_unicode=False, assert_unicode=None), nullable=False, unique=True) I create my object and I see the SQL generated just fine. I have an external sqlite client looking at the data and I see the table row populate correctly with the marker_data column when I create objects through SQLAlchemy and commit them. However, the marker_data attribute on my python object for the Text fields is set to 'None' as soon as I commit or read it again from the db. The text I put in is about 1700 characters and has '\n' characters in it. Removing the '\n' characters didn't change the behaviour. When I use the engine by itself and do a raw query with engine.execute() the tuple data for the Text field comes back just fine. It seems to be the ORM populating my object's marker_data attribute which isn't working? Any ideas? How do I troubleshoot this further? there's something you're doing that is either setting this field to None or making it appear that way. would need more details (like a test case) to see exactly what it is. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/K6mArBXwxLEJ. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
