I'm using SQLAlchemy,
The situation is that the same database is accessed by two different Python
services. After service A performs add and commit, new entries can be seen
in the database, but service B cannot obtain new data through SQLAlchemy's
query, and only through the native mysql
To resolve this i try to create proxy object
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full
I know that you can define an on set event handler for an attribute using
the decorator @event.listens_for(Class.Attribute, 'set'). I'd like a single
event handler to handle every attribute on every class. How can I do this?
In the event handler I want to refresh the object before setting the
I can't reproduce any problem.
Filling out your mappings from your first email, these look like:
from sqlalchemy import *
from sqlalchemy.orm import relationship
from datetime import datetime
from sqlalchemy.ext.declarative import declarative_base as db
target_metadata = MetaData()
Hi Mike,
The message has been truncated.
The CREATE TABLE statements is :
CREATE TABLE users (
id BIGSERIAL NOT NULL,
email VARCHAR(100) NOT NULL,
name VARCHAR(100) NOT NULL,
hashed_password VARCHAR(100) NOT NULL,
is_admin BOOLEAN,
is_active
maybe clearer
class Address(object):
def __init__(self, name, value, towndetail):
self.name = name
self.value = value
self.towndetail = towndetail
@classmethod
def __composite_constructor__(cls, name, value, town_name, town_value):
"""given name, value, name, value return
test_instance.street_address.town_detail.name = 'tataa'
after create now work, is it normal?
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See
That's perfect when have not > 3k tables and dont need load compound
columns and relationships when called)
Without that for create with orm i need ~ 200s with SSD and ~ 60 seconds to
load all relationships))
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
That is my fault, sorry)
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
---
You received
On Thu, Dec 13, 2018 at 8:40 AM Tolstov Sergey wrote:
>
> Here is my example, how to get arond decorator classmethod (without it not
> work, self.__class__ instead of Address not override this function)
sure that works too, the docstring now says "any callable" so sure
the approach I've
On Thu, Dec 13, 2018 at 7:11 AM patrick payet wrote:
>
> Hi Mike,
> Thanks for your answer.
> My problem it’s a classical problem for application development, I want to
> make authentication and authorisation for a web application.
> I want to understand why Alembic can’t create the model in
Here is my example, how to get arond decorator classmethod (without it not
work, self.__class__ instead of Address not override this function)
session = sqlalchemy.orm.scoped_session(sqlalchemy.orm.sessionmaker(
bind=engine, autoflush=False))
def make_dump(obj):
return json.dumps(
On Thu, Dec 13, 2018 at 8:20 AM Tolstov Sergey wrote:
>
> I cannot undestand, why you use @classmethod?
it's an alternate constructor that accepts a, b, c, d as arguments,
rather than name, value, towndetail.
it's @classmethod because there is no instance of Address when it is called.
it's
On Thu, Dec 13, 2018 at 2:08 AM Tolstov Sergey wrote:
>
> Thanks, Not so bad as expected) Can you add this example to official docs?
magic
https://docs.sqlalchemy.org/en/latest/orm/composites.html?highlight=composite#nesting-composites
>
> среда, 12 декабря 2018 г., 20:33:05 UTC+3
I cannot undestand, why you use @classmethod?
среда, 12 декабря 2018 г., 20:33:05 UTC+3 пользователь Mike Bayer написал:
>
> composites of composites aren't supported directly so you'd have to
> map out all the columns for "street" directly, then define a
> constructor that handles the columns:
Hi Mike,
Thanks for your answer.
My problem it’s a classical problem for application development, I want to
make authentication and authorisation for a web application.
I want to understand why Alembic can’t create the model in autogeneration
mode and how modify this model to resolve this problem.
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