I ended up settling for this:
@hybrid_property
def ancestors(self):
session = inspect(self).session
cte = session.query(P2B) \
.filter(P2B.id == self.id) \
.cte(name='cte', recursive=True)
cte = cte.union(
On Fri, Jun 8, 2018 at 7:13 PM, Daniel Cardin wrote:
> Aha i didn't realize I had a mismatch of relationship names
>
> Below I included a full example that fails an assert where I'm having the
> issue.
>
> The only reason I have "unordered_things" and "things" relationships is
> because I wasn't
Aha i didn't realize I had a mismatch of relationship names
Below I included a full example that fails an assert where I'm having the
issue.
- The only reason I have "unordered_things" and "things" relationships
is because I wasn't sure how to get it to only include the query's sort
-
On Fri, Jun 8, 2018 at 6:59 PM, HP3 wrote:
> :(
>
> Basically, I was trying to prevent the SQL Select for each child-to-parent
> loop-iteration when navigating the tree from leaf to root because I figured
> I could use CTE recursive as @hybrid_property.expression.
>
> I was trying to take full
:(
Basically, I was trying to prevent the SQL Select for each child-to-parent
loop-iteration when navigating the tree from leaf to root because I figured
I could use CTE recursive as @hybrid_property.expression.
I was trying to take full advantage of @hybrid_property.expression like the
On Fri, Jun 8, 2018 at 5:14 PM, HP3 wrote:
> Thank you so much Mike
>
>
> I am trying to write @ancestors.expression to produce a SQL like this:
>
> WITH RECURSIVE scte(id, parent_id) AS
>
> (SELECT p2bases.id AS id, p2bases.parent_id AS parent_id
>
> FROM p2bases
>
> WHERE p2bases.id = %(id_1)s
Thank you so much Mike
I am trying to write @ancestors.expression to produce a SQL like this:
WITH RECURSIVE scte(id, parent_id) AS
(SELECT p2bases.id AS id, p2bases.parent_id AS parent_id
FROM p2bases
WHERE p2bases.id = %(id_1)s --- This is the param I need at runtime (cls.id)
UNION
On Fri, Jun 8, 2018 at 2:08 PM, Daniel Cardin wrote:
> So "ParentFeature.shows" is there for the case where I query
> `pg.query(Parent)`, I want it to be ordered ascending.
>
> The only reason i have "ParentFeature.unordered_shows" is because if I try
noting that, I don't know what
the example is huge can you point out which two queries you'd like to compare?
this:
cte = dbsession.query(P2B.id, P2B.parent_id) \
.filter(P2B.id == child_id) \
.cte(name='cte', recursive=True)
cte = cte.union(
dbsession.query(P2B.id, P2B.parent_id).filter(
A!!! Makes perfect sense!
But there is something still amiss ...
The last 2 assertions are triggering because the query is returning a
single ancestor (self) instead of the whole recursive list.
See the plain CTE and the @hybrid_property.expression CTE: T*he where
clauses are still
So "ParentFeature.shows" is there for the case where I query
`pg.query(Parent)`, I want it to be ordered ascending.
The only reason i have "ParentFeature.unordered_shows" is because if I try
to apply an `order_by` to `Thing.name` in a query (like my query example),
it emits "ORDER BY
On Fri, Jun 8, 2018 at 11:40 AM, Daniel Cardin wrote:
> I'm attempting to a sort of complex relationship filter/sort operation. I
> need to filter results by the id of a parent relationship, and then sort a
> nested relationship by one of its attributes
>
> class Parent(Base):
> __tablename__
On Fri, Jun 8, 2018 at 12:16 PM, HP3 wrote:
> Attached the whole file
OK, removing all the "zope" stuff as well as all the other queries
that aren't noted as failing, I am only looking at this query:
ancestors = dbsession.query(P2B.ancestors).filter(P2B.id ==
child_id).all() #
Attached the whole file
On Thursday, June 7, 2018 at 7:01:21 PM UTC-5, HP3 wrote:
>
> Hello
>
>
> Having difficulty with CTE and @hybrid_property.expression on a adjacency
> list model.
>
>
> class P2B(Base):
> __tablename__ = 'p2bases'
> id = Column(Integer, primary_key=True)
>
I'm attempting to a sort of complex relationship filter/sort operation. I
need to filter results by the id of a parent relationship, and then sort a
nested relationship by one of its attributes
class Parent(Base):
__tablename__ = 'parent'
id = Column(types.Integer, primary_key=True,
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