On 02/03/2012 12:08 PM, lars van gemerden wrote:
I should probably make the pair method:
def pair(name1, name2):
p1, p2 = Pairs(name1), Pairs(name2)
p1.other = p2
p2.other = p1
On Feb 3, 11:57 am, lars van gemerden<l...@rational-it.com> wrote:
Hi, I am trying to sote pairs in a table as follows:
#--------------------------------------------------------------------------
------------
from elixir import *
metadata.bind = "sqlite:///:memory:"
metadata.bind.echo = False
class Pairs(Entity):
name = Field(String(50), primary_key = True)
other = OneToOne('Pairs', inverse = 'other')
You can't have a OneToOne as inverse for a OneToOne, even less for
itself. Valid relationship pairs are:
ManyToOne - OneToOne
ManyToOne - OneToMany
ManyToMany - ManyToMany
In your case you want:
class Pairs(Entity):
name = Field(String(50), primary_key = True)
other1 = ManyToOne('Pairs', inverse = 'other2')
other2 = OneToOne('Pairs', inverse = 'other1')
and if your database really only stores pairs, a property might make it
more elegant:
@property
def other(self):
return self.other1 if self.other1 is not None else self.other2
As a side note, you probably do not want to use Elixir for a new
project, as Elixir is not maintained anymore.
-G.
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