Well thats the thing, my users will determine the data structure
(graphically) and it is hard to predict what they will come up with.
On the other hand, I am only building a prototype at the moment, so
speed issues (if not easily solved) will have to wait.
I'll stick with joined inheritance for
Is there an obvious way to set up an association proxy so that it only
returns distinct objects?
For example, if I have:
Post - Tag - Tag_Category
and would like to access Post.Tag_Categories so that it contains each
category only once.
Any tips appreciated, sure I am missing something obvious
building SQLAlchemy apps graphically, that's extremely challenging good luck !
On May 1, 2012, at 5:19 AM, lars van gemerden wrote:
Well thats the thing, my users will determine the data structure
(graphically) and it is hard to predict what they will come up with.
On the other hand, I am
Since the uniqueness makes this kind of a read only thing, I'd use a plain
@property:
@property
def unique_tags(self):
return set(cat.tag for cat in self.tag_categories)
On May 1, 2012, at 10:08 AM, Benjamin Sims wrote:
Is there an obvious way to set up an association proxy so that it
Hey all, we've been using SQLAlchemy for about 5 years now, currently with
Pyramid, but have not ever deployed to anything other than a standard vps
for a one client install. We're now gearing up to make some of our products
available as monthly subscriptions, and am looking for opinions and
Is it possible to use the 'WITH ROLLUP' clause in SQLAlchemy? I'm having
problems locating any examples on how to do so.
Here's a link to MySQL (dialect I'm using) docs on the statement -
http://dev.mysql.com/doc/refman/5.0/en/group-by-modifiers.html
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this isn't built in right now, here's a recipe:
from sqlalchemy.ext.compiler import compiles
from sqlalchemy.sql.expression import ColumnElement, _clause_element_as_expr
class rollup(ColumnElement):
def __init__(self, element):
self.element = _clause_element_as_expr(element)
Awesome, Thanks!
On Tuesday, May 1, 2012 10:41:19 AM UTC-5, Michael Bayer wrote:
this isn't built in right now, here's a recipe:
from sqlalchemy.ext.compiler import compiles
from sqlalchemy.sql.expression import ColumnElement,
_clause_element_as_expr
class rollup(ColumnElement):
def
Thanks, works perfectly.
On 1 May 2012 15:16, Michael Bayer mike...@zzzcomputing.com wrote:
Since the uniqueness makes this kind of a read only thing, I'd use a
plain @property:
@property
def unique_tags(self):
return set(cat.tag for cat in self.tag_categories)
On May 1, 2012, at
Here's a modification we made to ROLLUP so it would work with multiple
columns:
class rollup(ColumnElement):
def __init__(self, *elements):
self.elements = [_clause_element_as_expr(e) for e in elements]
@compiles(rollup, mysql)
def _mysql_rollup(element, compiler, **kw):
return
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