[sqlalchemy] Adding MapperExtensions after Mappers created
How do i add a MapperExtension to a mapper after the mapper has been created with the mapper() function --~--~-~--~~~---~--~~ 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] Re: SELECT statement inside in_
Sanjay ha scritto: I got that the obvious way is just writing the string query, i.e. query.filter(col IN SELECT col FROM some_table) something like this: query.filter( col.in_( select([col],...).correlate(None) )) Glauco --~--~-~--~~~---~--~~ 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] Re: Adding MapperExtensions after Mappers created
theres a collection calledextension i believe, which has an append() method (also unsure of that name). jarrod.ches...@gmail.com wrote: How do i add a MapperExtension to a mapper after the mapper has been created with the mapper() function --~--~-~--~~~---~--~~ 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] Re: SELECT statement inside in_
Sanjay wrote: Hi, I want to write something like query.filter(BizObj.col.in_(SELECT col FROM some_table)). Could not find out how to do it. The code on neither the above nor the below worked. query.filter(BizObj.col1.in_(sqlalchemy.sql.text(SELECT col1 FROM sometable))). in_() is going to want a select() construct for that calling style. if you don't have a Table or mapped class for sometable, you can make an ad-hoc table using table(): from sqlalchemy.sql import table, column BizObj.col1.in_(select([table(sometable, column(col1)).c.col1])) Needing help. thanks, Sanjay --~--~-~--~~~---~--~~ 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] Re: SELECT statement inside in_
On Wed, Mar 18, 2009 at 11:00 AM, Michael Bayer mike...@zzzcomputing.comwrote: Sanjay wrote: Hi, I want to write something like query.filter(BizObj.col.in_(SELECT col FROM some_table)). Could not find out how to do it. The code on neither the above nor the below worked. query.filter(BizObj.col1.in_(sqlalchemy.sql.text(SELECT col1 FROM sometable))). in_() is going to want a select() construct for that calling style. if you don't have a Table or mapped class for sometable, you can make an ad-hoc table using table(): from sqlalchemy.sql import table, column BizObj.col1.in_(select([table(sometable, column(col1)).c.col1])) and if I do have a mapped class, say SomeClass, is there an ORM-like syntax to use the class or do I drop into SQL-like syntax using SomeClass.__table__ ? query = session.query(BizObj).filter(BizObj.col1.in_(??)) --~--~-~--~~~---~--~~ 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] Re: SELECT statement inside in_
col.in_(select([MyClass.col2])) Mike Conley wrote: On Wed, Mar 18, 2009 at 11:00 AM, Michael Bayer mike...@zzzcomputing.comwrote: Sanjay wrote: Hi, I want to write something like query.filter(BizObj.col.in_(SELECT col FROM some_table)). Could not find out how to do it. The code on neither the above nor the below worked. query.filter(BizObj.col1.in_(sqlalchemy.sql.text(SELECT col1 FROM sometable))). in_() is going to want a select() construct for that calling style. if you don't have a Table or mapped class for sometable, you can make an ad-hoc table using table(): from sqlalchemy.sql import table, column BizObj.col1.in_(select([table(sometable, column(col1)).c.col1])) and if I do have a mapped class, say SomeClass, is there an ORM-like syntax to use the class or do I drop into SQL-like syntax using SomeClass.__table__ ? query = session.query(BizObj).filter(BizObj.col1.in_(??)) --~--~-~--~~~---~--~~ 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] adding some sql function to several dialects
Hi, i need to add several functions to all dialects that i'll plan to use in order to be fully database-independent. Does anybody have tips how to achieve this? For example i want to add function year( date) to sqlite and postgres dialects. TIA, Stefan --~--~-~--~~~---~--~~ 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] Re: adding some sql function to several dialects
we'll be adding a feature for this soon. here is a non-public way to do it for now which will work throughout 0.5: from sqlalchemy.sql.expression import ClauseElement class year(ClauseElement): __visit_name__ = 'year' def __init__(self, value): self.value = value def _compiler_dispatch(self, compiler): if compiler.dialect.name == 'postgres': return pg_year(%s) % self.value else: return sqlite_year(%s) % self.value year._compiler_dispatch = _compiler_dispatch che wrote: Hi, i need to add several functions to all dialects that i'll plan to use in order to be fully database-independent. Does anybody have tips how to achieve this? For example i want to add function year( date) to sqlite and postgres dialects. TIA, Stefan --~--~-~--~~~---~--~~ 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] interval tree table
is there an easy way to represent an interval tree table in sqlAlchemy Interval Tree is very common way to represent tree. with right, left, level indices, node, leaf (left - right = 1) ? --~--~-~--~~~---~--~~ 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] Re: interval tree table
On Wednesday 18 March 2009 22:31:37 bard stéphane wrote: is there an easy way to represent an interval tree table in sqlAlchemy Interval Tree is very common way to represent tree. with right, left, level indices, node, leaf (left - right = 1) ? FIY see this thread with various tree rerpesentations (my or may not be there): Adjacency List tree - inefficient reading From: Kless jonas@googlemail.com To: sqlalchemy Date: 2009-01-18 20:33 --~--~-~--~~~---~--~~ 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] Re: interval tree table
bard stéphane wrote: is there an easy way to represent an interval tree table in sqlAlchemy Interval Tree is very common way to represent tree. with right, left, level indices, node, leaf (left - right = 1) ? there's no restriction using the SQL expression language. The ORM can do it too, see the example examples/nested_sets/nested_sets.py in the tar.gz distribution for a recipe. --~--~-~--~~~---~--~~ 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] Re: Any one tried to use SqlAlchemy with XML RPC?
This is my ORM class definition:
#=
class User(Base):
__tablename__ = 'b_taa_user'
user_id = Column(Integer, primary_key=True, autoincrement=True,
nullable=False) # 用户ID
user_name = Column(Unicode(255), unique=True, nullable=False,
server_default=) # 用户名称
user_password = Column(Unicode(255), nullable=False,
server_default=) # 用户密码
email = Column(Unicode(255), nullable=False, server_default=) # 邮
箱
mobile = Column(Unicode(255), nullable=False, server_default=) #
手机
phone = Column(Unicode(255), nullable=False, server_default=) # 电
话
def __init__(self, user_name = ):
self.user_name = username
#=
I made some debug by the code below:
#=
#!/usr/bin/python
import xmlrpclib
from blf.model import User
u = User('333')
s = xmlrpclib.dumps((u,), methodresponse=True, allow_none=True)
print s
#=
Finally, I found that the first problem is : xmlrpclib only serialize
type *instance*.
But to my surprise, when I check type of u, it's a *class* object.
Don't know why ...
On Mar 18, 6:50 pm, Noah Gift noah.g...@gmail.com wrote:
On Wed, Mar 18, 2009 at 11:46 PM, 一首诗 newpt...@gmail.com wrote:
Hi,
I am trying to pass SqlAlchemy objects to client with XML RPC, but it
seems that that's not very easy.
It depends on what you are trying to do, and what error messages you are
getting, for anyone to help. I am using XML RPC with SQLAlchemy right now,
and I am, in fact, passing objects in. I wrote a metaclass that calls back
to XML RPC, and takes the ugly nested dictionary and returns back a nifty
class pre-populated with attributes I need to fill out. When I set each
attribute, it then populates __dict__. At that point, I simply pass that
back to XML RPC. Works great.
The reason why I have to do this is that my client is written in
javascript and running on a web page. So it could not use anything
other than text based protocols, such as XML RPC, SOAP, or JSON.
I tried pyamf, and it works pretty good with SA, but I can't use amf
with javascript.
Is there any possible solutions with my problem?
--
Cheers,
Noah
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[sqlalchemy] Re: Any one tried to use SqlAlchemy with XML RPC?
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Hash: SHA1
On 19.03.2009 5:24 Uhr, 一首诗 wrote:
This is my ORM class definition:
#=
class User(Base):
__tablename__ = 'b_taa_user'
user_id = Column(Integer, primary_key=True, autoincrement=True,
nullable=False) # 用户ID
user_name = Column(Unicode(255), unique=True, nullable=False,
server_default=) # 用户名称
user_password = Column(Unicode(255), nullable=False,
server_default=) # 用户密码
email = Column(Unicode(255), nullable=False, server_default=) # 邮
箱
mobile = Column(Unicode(255), nullable=False, server_default=) #
手机
phone = Column(Unicode(255), nullable=False, server_default=) # 电
话
def __init__(self, user_name = ):
self.user_name = username
#=
I made some debug by the code below:
#=
#!/usr/bin/python
import xmlrpclib
from blf.model import User
u = User('333')
s = xmlrpclib.dumps((u,), methodresponse=True, allow_none=True)
print s
#=
Finally, I found that the first problem is : xmlrpclib only serialize
type *instance*.
But to my surprise, when I check type of u, it's a *class* object.
Don't know why ...
Sending mapped instances over XMLRPC is basically nonsense. XMLRPC is
designed for transporting elementary datatypes over the wire in order to
invoke a remote method. It is not designed for sending instances of some
class and not for sending Python pickles. No idea what you are trying to
accomplish. Consider converting a mapped instance to dict and sending
this dict serialized in JSON format to a remote XMLRPC server.
- -aj
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[sqlalchemy] Re: Any one tried to use SqlAlchemy with XML RPC?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 19.03.2009 6:49 Uhr, Arthur Pemberton wrote: SQLAlchemy needs a concept of Data Transfer Objects so that it can be easily transmitted and reconstituted as necessary and everyone doesn't have to reimplemented the idea themselves. There are many cases where one might want to transfer a model from a data source on a server side to a client, and vice verse. Which usecases? If you want to transfer objects over the wire from one app to another, you can also attach the database directly. You you work with serialized versions of the objects in some way...should be sufficient enough for most cases. - -aj - -- ZOPYX Ltd. Co. KG - Charlottenstr. 37/1 - 72070 Tübingen - Germany Web: www.zopyx.com - Email: i...@zopyx.com - Phone +49 - 7071 - 793376 Registergericht: Amtsgericht Stuttgart, Handelsregister A 381535 Gesch -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAknB3j4ACgkQCJIWIbr9KYysHQCfTuXFRZDIF4IBsL6UGA7ZYbEO CPIAoOFK4wA3mAmfuoR6byTWh9ngUpGc =U7aQ -END PGP SIGNATURE- --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~--- begin:vcard fn:Andreas Jung n:Jung;Andreas org:ZOPYX Ltd. Co. KG adr;quoted-printable:;;Charlottenstr. 37/1;T=C3=BCbingen;;72070;Germany email;internet:i...@zopyx.com title:CEO tel;work:+49-7071-793376 tel;fax:+49-7071-7936840 tel;home:+49-7071-793257 x-mozilla-html:FALSE url:www.zopyx.com version:2.1 end:vcard
