thank you I understand
2022년 12월 7일 수요일 오전 2시 56분 57초 UTC+9에 leleg...@gmail.com님이 작성:
> Ryan Lee writes:
>
> > https://docs.sqlalchemy.org/en/14/orm/quickstart.html#create-an-engine
> >
> > ```
> > engine = create_engine("sqlite://", echo=True, fu
https://docs.sqlalchemy.org/en/14/orm/quickstart.html#create-an-engine
```
engine = create_engine("sqlite://", echo=True, future=True)
```
If I use the code in example ,
I cannot find the exact file , where is it ?
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when I prepare crawling db dto from postgresql( AWS RDS) for my flask
application,
I set SQLAlchemy URI like follow
f'{RDS_PROTOCOL}://{RDS_USERNAME}:{RDS_PASSWORD}@{RDS_HOSTNAME}:{RDS_PORT}/{RDS_DB_NAME}'
but I don't know how to define one specific schema
pls let me knowTT
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Anyways guys I was able to fix the issue by installing a flask-specific
version of the same package (even though I am not using flask) and I was
able to get it to work just fine. Thanks everyone for your help.
On Wednesday, June 16, 2021 at 9:20:37 AM UTC-4 Ryan Bandler wrote:
> Yeah I conn
could not connect to server: Connection refused
> Is the server running on host "127.0.0.1" and accepting
>
> TCP/IP connections on port 5432?
>
> On Tuesday, June 15, 2021 at 1:06:23 PM UTC-4 Ryan Bandler wrote:
>
>> Hello everyone,
>>
>> I am a fi
this tool
because I have many tables with lots of columns and I dont like typing
boilerplate code when I dont have to. My question was not about SA itself
or how writing the model works ,but about this error I am experiencing with
this generator tool. I appreciate the response though!
Best,
Ryan
Hello everyone,
I am a first-time SQLalchemy user planning on using SQLalchemy on a new
project. We already have an established postgres database (currently still
on localhost) which I do not want to handwrite the SQLalchemy model for. So
I am planning to use sqlacodegen. Unfortunately,
And nope. It's coming when I'm running `aliased`, but it doesn't seem to be
directly related, even though it's the same warning. I think it has to do
with how I'm translating inherited models. Sorry for the false alarm.
On Wednesday, May 19, 2021 at 8:50:56 PM UTC-5 Ryan Hiebert wrote:
> S
So I am able to just add it on the many-to-many relationship, that worked
just fine. Unfortunately, I'm now having a similar issue come up when I use
`aliased` on a generated model. Do you have any suggestion for how to
handle that? It strikes me that either (a) aliased doesn't expect to be
, to
adjust existing relationships with this after they are created. Does that
sound right?
Thanks for all your help, and for the excellent docs on these warnings.
While I still have questions, I was able to understand quite a lot of it
before I needed to come ask for assistance.
Ryan
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change, so I'd like to choose the
wisest option, that most cleanly fits into the patterns that SQLAlchemy
users will most readily understand.
Thank you,
Ryan
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To post example code, please prov
) to go through the
> list of parent objects that have changed, traverse through the child
> objects you care about and call session.expire() on the attributes in
> question.
>
> On Thu, Jun 18, 2020, at 7:47 PM, Ryan Kelly wrote:
>
> Hi,
>
> We have some functional
wondering what approach I might take here to get these linked
tables to expire in a manner that is centralized and doesn't require users
to explicitly require certain objects (or all objects).
-Ryan
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;
>
> You can modify how the engine makes connections using the do_connect event
> hook:
>
>
> https://docs.sqlalchemy.org/en/13/core/events.html?highlight=do_connect#sqlalchemy.events.DialectEvents.do_connect
>
> each time the engine/ pool go to make a new connection, you can af
, solution.
What I am asking, I suppose, is 1) am I missing something obvious that
would make this achievable? and 2) if not, what kind of best-approach pull
request could I produce that could make this happen?
Thanks,
-Ryan
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http
I'd like to optimize querying and converting a list of Oracle tables into
pandas dataframes.
The eventual goal is to convert to Parquet, write to disk, then upload to
S3, but for now I just want to focus on the pandas / sqlalchemy /
parallelism part. My code sort of works, but it's very
I have the following fields defined in a table.
`updated` datetime NOT NULL DEFAULT '1970-01-01 00:00:01',
`deleted` datetime NOT NULL DEFAULT '1970-01-01 00:00:01',
When someone runs SQLACODEGEN it changes the definition of the
server_default time based on the timezone the developer is in
Thanks Mike,
While I would rather this be a hard constraint on the database, not
enforced in python, I understand that SQLite is pretty limited in this
regard, so I'm down to try anything really. I also had the idea of using a
custom collection simply because the project already uses them
(cross posted from https://stackoverflow.com/questions/49225846/)
Lets say I have 3 tables: parent, child, and a linker table for the two for
a many-to-many relationship, `parentChildren`. Each parent can have
multiple children, and each child can have multiple parents. If parent 1
already has
20, 2017 at 10:20:51 AM UTC-7, Mike Bayer wrote:
>
>
>
> On 06/20/2017 01:04 PM, Ryan Weinstein wrote:
> >
> >
> > On Tuesday, June 20, 2017 at 9:53:10 AM UTC-7, Jonathan Vanasco wrote:
> >
> > you're almost there.
> >
> > flip
On Tuesday, June 20, 2017 at 9:53:10 AM UTC-7, Jonathan Vanasco wrote:
>
> you're almost there.
>
> flip a few lines around to rewrite the query to select from product...
> e.g. something like
>
> SELECT r_product_list.* FROM r_product_list
> JOIN r_product_category_history_list on
>
On Tuesday, June 20, 2017 at 9:53:10 AM UTC-7, Jonathan Vanasco wrote:
>
> you're almost there.
>
> flip a few lines around to rewrite the query to select from product...
> e.g. something like
>
> SELECT r_product_list.* FROM r_product_list
> JOIN r_product_category_history_list on
>
On Monday, June 19, 2017 at 6:40:04 PM UTC-7, Jonathan Vanasco wrote:
>
> You're not joining anything onto the `rProductCategoryHistory` table, so
> depending on your DB you may be getting populated rows for rProduct that
> don't match anything.
>
> you probably want something like this...
>
>
query = db.session.query(rProductCategoryHistory,rProduct)\
.join(rProduct,rProduct.r_id==rProductCategoryHistory.r_id)\
.join(rProductHistoricalDetails,
rProductHistoricalDetails.id==rProduct.most_recent_historical_details_id)\
bvious. The descriptions of the current
examples all immediately jump into technical details of foreign keys,
scalars, and association tables.
Ryan
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Hello,
I have User and Session classes like this:
class User(Base):
__tablename__ = 'users'
id = Column(Integer, primary_key=True)
sessions = relationship('Session')
@property
def last_login_time(self):
return sorted(self.sessions, reverse=True, key=lambda x:
complicates things,
since most resources I find have two distinct objects along with the
association.
On Monday, July 6, 2015 at 1:14:29 PM UTC-4, Michael Bayer wrote:
On 7/6/15 12:06 PM, Ryan Holmes wrote:
I have an interesting problem that I haven't been able to solve for
quite
I have an interesting problem that I haven't been able to solve for quite
some time. I keep finding information about association proxies and the
like, but nothing that really helps (or maybe I'm implementing it
incorrectly).
Let's start with this:
class HandledProjectedItemList(list):
I am currently stuck on creating association proxy.
The composite association_proxy (
http://docs.sqlalchemy.org/en/latest/orm/extensions/associationproxy.html#composite-association-proxies)
pattern pointed to using UniqueObject recipe (
.
Thanks,
Elliot
-Ryan
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issuing DDL using information from untrusted sources,
but it probably should.
-Ryan Kelly
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of the given solution, at a
minimum.
-Ryan Kelly
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Is there some issue with doing: sel2 = sel.where(product_table.c.name
== water) ?
If you really have no reference to the product_table, I think you can
hack it with sel._raw_columns to try and find the column you want to
filter to.
-Ryan Kelly
On Mon, May 19, 2014 at 9:12 PM, gbr doubl
I see your compatibility concerns.
Let me see if .offset() without .limit() does the right thing.
-Ryan Kelly
On Thu, Mar 20, 2014 at 10:39 PM, Michael Bayer
mike...@zzzcomputing.com wrote:
the int() catch here on limit/offset is something we added due to user report
which raised the issue
way to convince SQLAlchemy to render these values?
-Ryan Kelly
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To post
Redshift needs LIMIT ALL to avoid attempting an optimization which
causes it to crash.
Note that OFFSET 0 is the same as omitting OFFSET, but it acts as an
optimization fence. This, I suppose, is a similar thing.
-Ryan Kelly
On Thu, Mar 20, 2014 at 5:38 PM, Michael Bayer mike
that way, but
the error message cost me about 30 minutes just trying to figure out
why.
Not sure if there is a good way to fix this or what the correct approach is.
-Ryan Kelly
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be patched, since they basically
just didn't implement ordering. PostgreSQL itself has no problem
ordering range types (though the ordering is somewhat arbitrary):
http://www.postgresql.org/docs/9.2/static/rangetypes.html#RANGETYPES-GIST
-Ryan
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Description: Digital signature
.
-Ryan Kelly
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On Thu, Oct 10/10/13, 2013 at 12:59:31PM -0400, Michael Bayer wrote:
On Oct 10, 2013, at 8:34 AM, Ryan Kelly rpkell...@gmail.com wrote:
Hi:
One of our applications is generating the following error:
NoSuchColumnError: Could not locate column in row for column
to
Inspector.from_engine, and inside I see this:
if self.engine is bind:
# if engine, ensure initialized
bind.connect().close()
It seems to be the cause of the ROLLBACK.
I'm not sure why this is necessary. Thoughts?
-Ryan
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be conditionalized.
On Jun 27, 2013, at 3:05 PM, Ryan Kelly rpkell...@gmail.com wrote:
Attempting to use Inspector.from_engine to get a list a table names from
the database. Running the test suite of a large program I found that my
data would disappear. After digging around in my own code for a few
around with it and see what happens.
On Jun 27, 2013, at 5:26 PM, Ryan Kelly rpkell...@gmail.com wrote:
On Thu, Jun 06/27/13, 2013 at 05:14:30PM -0400, Michael Bayer wrote:
what kind of pooling are you using?
StaticPool. I'm creating temporary tables over the connection and
without
On Tue, Jun 06/25/13, 2013 at 02:47:18PM -0400, Michael Bayer wrote:
On Jun 25, 2013, at 2:13 PM, Ryan Kelly rpkell...@gmail.com wrote:
There are also some other parsing problems that I consider to be corner
cases and broken as implemented in PostgreSQL, such as:
(postgres@[local
:10:12) [dev] select ',=,'::hstore;
None of which are parsed by SQLAlchemy but some of which are parsed by
PostgreSQL. You can see the bug report I filed about some of them here:
http://www.postgresql.org/message-id/20120426190513.gb31...@llserver.lakeliving.com
-Ryan P. Kelly
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to trigger a connection recycle given a session?
-Ryan P. Kelly
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To post
)
session.query(bug).all()
ProgrammingError: (ProgrammingError) syntax error at or near ?
LINE 1: SELECT A Bug?(1) AS A Bug?_1
'SELECT A Bug?(%(A Bug?_2)s) AS A Bug?_1' {'A Bug?_2': 1}
-Ryan P. Kelly
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. the objects were detached, and were add()ed back into the session, but
this still implies that #1 or #2 were true for a previous Session.
On Feb 12, 2013, at 5:29 PM, Ryan McKillen ryan.mckil...@gmail.com wrote:
It doesn't appear that the method decorated by @orm.reconstructor is called
is called.
So if I need it to be executed in a relationship-loading situation, what's
the best way to go about it? Thanks.
— RM
On Mon, Jan 7, 2013 at 3:36 AM, Ryan McKillen ryan.mckil...@gmail.comwrote:
Worked like a charm. Thanks.
— RM
On Mon, Jan 7, 2013 at 6:26 PM, Michael van Tellingen
'union'
Attached is a patch with a test case.
-Ryan Kelly
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To post
this:
from sqlalchemy.sql.expression import func, literal, not_
session.query(foo).filter(not_(literal(1) == func.all(foo.c.bar)))
But I should really ask here for help because I've loaded the foot-gun
completely full.
So, what's the correct way to do this?
-Ryan Kelly
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Worked like a charm. Thanks.
— RM
On Mon, Jan 7, 2013 at 6:26 PM, Michael van Tellingen
michaelvantellin...@gmail.com wrote:
See
http://docs.sqlalchemy.org/en/latest/orm/mapper_config.html#constructors-and-object-initialization
On Mon, Jan 7, 2013 at 4:47 AM, RM ryan.mckil...@gmail.com
On Tue, Nov 27, 2012 at 11:00:25AM -0500, Michael Bayer wrote:
On Nov 27, 2012, at 8:10 AM, Idan Kamara wrote:
Hello,
I'd like to create a construct for postgres's multirow insert. I asked this
on IRC
and got some great help from supplicant, however I have a few things
missing:
)))
+ func.sin(func.radians(literal(origin_lat)))
* func.sin(func.radians(markers.lat))
)
query = (
session.query(markers.lat, markers.lng, distance.label(distance))
.having(distance literal(25))
.order_by(distance)
.limit(20)
)
-Ryan Kelly
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postgresql 9.1 and psycopg2, FWIW.
-Ryan Kelly
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://docs.sqlalchemy.org/en/rel_0_7/core/expression_api.html#sqlalchemy.sql.expression.literal
as column specs, but with no luck so far.
-Ryan Kelly
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for the _compiler_dispatch in
visit_delete/visit_update, and the other for implementing FROM ONLY
using hints. Pretty similar to your patch but with some fixes to make
it work with UPDATE and DELETE as well as proper tests and
documentation.
-Ryan Kelly
On Jun 9
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-Ryan Kelly
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On Sat, May 05, 2012 at 08:00:20PM -0400, Michael Bayer wrote:
On May 5, 2012, at 7:33 PM, Ryan Kelly wrote:
List:
I am currently trying to add support for FROM ONLY to the postgresql
dialect. FROM ONLY is used when you wish to query a table which has other
tables that inherit from
All:
The attached patch implements the MATCH keyword for foreign keys. This
is part of the SQL92 standard, and is supported by PostgreSQL and
Oracle.
Feedback welcome.
-Ryan Kelly
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All the best,
Ryan
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in feedback on whether or not I'm headed in the
right direction with it. It also depends on the first patch.
Also, is this the right list?
-Ryan Kelly
[1] http://www.globalnerdy.com/2010/05/09/new-programming-jargon/
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I have a MySQL VARCHAR column, but I'd like to get ENUM-like behavior at
the ORM level. I'm using the declarative style. Here's what I've got so far:
language = Column(Enum('en', 'fr', native_enum=False), CheckConstraint(),
default='en')
Docs say that when native_enum is set to False, uses
Can't find anything in the docs as to whether query strings passed into
Session.execute are escaped/safe from SQL injection. Any insights? Thanks.
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Great. Thank you.
On Mon, Feb 28, 2011 at 9:37 PM, Michael Bayer mike...@zzzcomputing.comwrote:
On Feb 28, 2011, at 5:35 PM, Ryan wrote:
Can't find anything in the docs as to whether query strings passed into
Session.execute are escaped/safe from SQL injection. Any insights? Thanks
I added that in because without it I get:
TypeError: Incompatible collection type: User is not list-like
On Tue, Feb 22, 2011 at 6:47 PM, Michael Bayer mike...@zzzcomputing.comwrote:
On Feb 22, 2011, at 9:03 PM, Ryan McKillen wrote:
Mike, thanks a lot. Big help. I'm almost
22, 2011, at 9:59 PM, Ryan McKillen wrote:
I added that in because without it I get:
TypeError: Incompatible collection type: User is not list-like
On Tue, Feb 22, 2011 at 6:47 PM, Michael Bayer
mike...@zzzcomputing.comwrote:
On Feb 22, 2011, at 9:03 PM, Ryan McKillen wrote:
Mike, thanks
I'm attempting a self-referential mapping on a Client object that includes
these two columns:
id = Column(Integer, primary_key=True)
inviter_id = Column(Integer, ForeignKey('users.id'), nullable=True)
Started here with no luck:
inviter = relationship('Client', primaryjoin='Client.id ==
I'm using MapperExtension#after_insert and realizing that this callback
fires when a record has been inserted into a transaction, but before the
session is actually committed.
I'd like an after_insert callback that fires after commit/once the record
physically resides in the database. Any
Problem solved. Had to to with my setup, unrelated to SQLAlchemy. Sorry!
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I'm using the declarative style and unable to to get a mapper to initialize.
Here's a simplified version of the class from client_transaction.py:
class ClientTransaction(Base):
__tablename__ = 'client_transactions'
id = Column(Integer, primary_key=True)
client_promotion_id =
On Jun 21, 10:02 pm, Michael Bayer mike...@zzzcomputing.com wrote:
yes please see the polymorphic association example included in the
distribution .
Thanks! It seems there's nothing SQLAlchemy can't do :).
Btw, since the examples are a bit complicated, here is just for
reference in case
='thumbnail_id'))
Thanks again, you saved my sanity.
-Ryan
On Sep 26, 3:17 pm, Mike Conley mconl...@gmail.com wrote:
You need to use argument post_update=True
on your thumbnails relation
http://www.sqlalchemy.org/docs/05/mappers.html#rows-that-point-to-the...
http://www.sqlalchemy.org/docs
circular
dependancy errors.
Can someone help me understand what's going wrong?
Thanks
-Ryan
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OK, thank you.
But one last thought: Is storing the query rather than the result
really the way?
I mean, after a couple dozen complex, expensive change operations, the
user could end up with only 4 records. It would be more efficient to
just store the indexes rather than redo all the queries
= query.all()
If instead I stored the query object, how would I then and_ and or_
it?
Thanks a lot Michael. This is extremely helpful and gracious.
- Adam
On Nov 6, 3:15 pm, Michael Bayer [EMAIL PROTECTED] wrote:
On Nov 6, 2008, at 12:28 AM, Adam Ryan wrote:
I can't store the query object
Hi Michael
2008/7/18 Michael Bayer [EMAIL PROTECTED]:
On Jul 18, 2008, at 9:37 AM, Ryan Tracey wrote:
sqlalchemy.exc.NoSuchTableError: manufacturer
Just to sum up:
dbengine = create_engine('mysql://u:[EMAIL PROTECTED]/schema1')
meta = MetaData()
meta.bind = dbengine
Table('tableX
Hi Michael
2008/7/17 Michael Bayer [EMAIL PROTECTED]:
On Jul 17, 2008, at 7:12 AM, Ryan Tracey wrote:
Hi
I would like to do a correlated update involving tables located in two
logical databases on the same MySQL server.
The commented out code below would work except that the mysql
Hi Michael
2008/7/17 Michael Bayer [EMAIL PROTECTED]:
On Jul 17, 2008, at 7:12 AM, Ryan Tracey wrote:
Hi
I would like to do a correlated update involving tables located in two
logical databases on the same MySQL server.
The commented out code below would work except that the mysql
and
sdf_customer.WholesalerID=fc.WholesalerID)
where
sdf_customer.StatusID in (8, 12)
and
sdf_customer.FileID in %s % (file_ids_str,)
rc = dbengine.execute(sql).rowcount
Any help would be much appreciated.
Regards,
Ryan
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Using SQLAlchemy 0.4.4
I am having a problem with SQLAlchemy where after the application that
uses SQLAlchemy has been sitting overnight and a user makes the first
queries of the day thru the app that uses SA, SQLAlchemy throws an
error saying 'MySQL server has gone away', which I understand the
On Jul 11, 10:03 am, Michael Bayer [EMAIL PROTECTED] wrote:.
The reason you're getting the disconnect exception in the first place
is because the pool_recycle feature only works upon checkout from the
pool. So the solution is the same, ensure all connections are
returned to the pool
[mailto:[EMAIL PROTECTED] On Behalf Of Ryan Ginstrom
If I start my method calls with begin() would I be able to
create functions in the connection object, then use my
session object to run queries?
Founds this one out for myself: no, it doesn't work g
Regards,
Ryan Ginstrom
approach?
Thanks in advance for any enlightenment.
Regards,
Ryan Ginstrom
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in the connection object, then use my session object to run
queries?
Regards,
Ryan Ginstrom
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And whatever happened to the nice select_by Query method where I could
mix filter-type criterion arguments and filter_by-type keyword
arguments in one call. *That* was readable to me, and very usable in
a pythonic way. What's wrong with having one filter method that does
everything? Python
In 0.4: Is there any reason that I (as far as i can tell) need an
explicit 'and_' to use multiple parameters with Query.filter, as
opposed to filter_by, where I don't need an explicit 'and_'? I think
the latter is cleaner.
Ryan
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would be cleaner, since I could just pass a 'host'
variable that may be None without having to check it manually first
before getting its id (however simple that might be).
Thanks.
Ryan
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