On 2/13/2014 11:45 AM, Michael Bayer wrote:
So for children above you need to spell out primaryjoin completely which is
primaryjoin=and_(Animal.sire_id == Animal.id_, Animal.dam_id == Animal.id).
Thought I was on the right track but now getting the exception below. Here's
the model:
class
On Feb 14, 2014, at 12:46 PM, Michael Hipp mich...@redmule.com wrote:
On 2/13/2014 11:45 AM, Michael Bayer wrote:
So for children above you need to spell out primaryjoin completely which
is primaryjoin=and_(Animal.sire_id == Animal.id_, Animal.dam_id ==
Animal.id).
Thought I was on the
On 2/14/2014 11:50 AM, Michael Bayer wrote:
On Feb 14, 2014, at 12:46 PM, Michael Hipp mich...@redmule.com wrote:
On 2/13/2014 11:45 AM, Michael Bayer wrote:
So for children above you need to spell out primaryjoin completely which is
primaryjoin=and_(Animal.sire_id == Animal.id_,
right this is why reading the docs is better, those have been checked… remote
side for m2o refers to the primary key, so:
from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
class Animal(Base):
On 2/14/2014 1:51 PM, Michael Bayer wrote:
right this is why reading the docs is better, those have been checked...
remote side for m2o refers to the primary key, so:
The docs says: '...directive is added known as remote_side, which is a Column
or collection of Column objects that indicate
On Feb 14, 2014, at 3:16 PM, Michael Hipp mich...@redmule.com wrote:
On 2/14/2014 1:51 PM, Michael Bayer wrote:
right this is why reading the docs is better, those have been checked...
remote side for m2o refers to the primary key, so:
The docs says: '...directive is added known as
On 2/14/2014 2:34 PM, Michael Bayer wrote:
A basic fact of a self referential relationship is that you're building a tree.
The root of the tree has to be NULL and I'd advise against trying to work
around that.
Now if you wanted to in fact assign the object's own primary key to the foreign
On Feb 14, 2014, at 4:29 PM, Michael Hipp mich...@redmule.com wrote:
On 2/14/2014 2:34 PM, Michael Bayer wrote:
A basic fact of a self referential relationship is that you're building a
tree. The root of the tree has to be NULL and I'd advise against trying to
work around that.
Now
On 2/14/2014 3:36 PM, Michael Bayer wrote:
the django ORM would write an autogenerated primary key value to a foreign
key column at the same time in a single INSERT? What magic might they have
discovered there? (hint: i am sure they don't do that)
Naw. If you recall I was supplying the pkey
I'm trying to do something like this:
class Animal(Base):
__tablename__ = 'animals'
id_ = Column(Integer, primary_key=True)
sire_id = Column(Integer, ForeignKey('animals.id_'))
dam_id = Column(Integer, ForeignKey('animals.id_'))
sire = relationship('Animal',
On Feb 13, 2014, at 11:53 AM, Michael Hipp mich...@redmule.com wrote:
I'm trying to do something like this:
class Animal(Base):
__tablename__ = 'animals'
id_ = Column(Integer, primary_key=True)
sire_id = Column(Integer, ForeignKey('animals.id_'))
dam_id = Column(Integer,
On 2/13/2014 11:06 AM, Josh Kuhn wrote:
I think you need to use the remote_side argument for the children
relationship, since it's the same table
http://docs.sqlalchemy.org/en/rel_0_9/orm/relationships.html#adjacency-list-relationships
Thanks. I'm just not sure how to specify it when there
On 2/13/2014 11:04 AM, Michael Bayer wrote:
On Feb 13, 2014, at 11:53 AM, Michael Hipp mich...@redmule.com wrote:
I don't see a first_owner relationship defined above, so the above example
is not complete. The approach using foreign_keys is the correct approach to
resolving ambiguity in join
I think you need to use the remote_side argument for the children
relationship, since it's the same table
http://docs.sqlalchemy.org/en/rel_0_9/orm/relationships.html#adjacency-list-relationships
On Thu, Feb 13, 2014 at 12:04 PM, Michael Bayer mike...@zzzcomputing.comwrote:
On Feb 13,
On Feb 13, 2014, at 12:16 PM, Michael Hipp mich...@redmule.com wrote:
On 2/13/2014 11:04 AM, Michael Bayer wrote:
On Feb 13, 2014, at 11:53 AM, Michael Hipp mich...@redmule.com wrote:
I don't see a first_owner relationship defined above, so the above example
is not complete. The approach
On 2/13/2014 11:45 AM, Michael Bayer wrote:
primaryjoin=and_(Animal.sire_id == Animal.id_, Animal.dam_id == Animal.id)
Thank you. That works great. And thanks for the explanation.
Michael
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