Displaying 20 results from an estimated 187 matches for "referenti".
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referent
2006 Nov 29
4
how do I model self-referential entities?
Hi all -
I am having some trouble figuring out how to model self-referential
entities in Rails.
I have a "group" model, which can have 0 or more "group" objects or 0 or
more "user" objects.
I tried creating a subgroup table that has a parent_group_id and a
child_group_id as foreign keys but can''t figure out how to create the
ma...
2006 Aug 02
2
Self-Referential has_many :through
Hello all.
I am trying to create a self-referential has_many :through. I used the
following site as a guide
http://blog.hasmanythrough.com/articles/2006/04/21/self-referential-through
but it still doesn''t appear to be working. I have two models. Person and
Relationship. A person has many contacts (Which is another person)
through rel...
2008 Sep 26
0
self-referential tags, has_many_polymorphs
Hi,
I''m looking to add tagging to an application, and I would like to allow
self-referential tags, so that I can tag my tags. With the goal of
generating a flexible tag hierarchy.
After some googling it looks like acts_as_taggable is not the best piece
of code, and I''m hoping to use the has_many_polymorphs plugin from
http://github.com/fauna/has_many_polymorphs/tree/master. A...
2012 Oct 22
4
[LLVMdev] Self-referential instruction from jump threading
Hello,
After investigating PR14133, I've discovered that jump threading can output self-referential instructions:
%inc.us = add nsw i32 %inc.us, 1
At least in the test case for that bug report, the relevant code is later deleted (perhaps it is unreachable), and so this does not cause a problem. Unfortunately, when vectorization is enabled, this instruction causes BBVectorize to hang. Should I...
2012 Oct 22
0
[LLVMdev] Self-referential instruction from jump threading
Hi Hal,
> After investigating PR14133, I've discovered that jump threading can output self-referential instructions:
> %inc.us = add nsw i32 %inc.us, 1
such instructions are valid in unreachable basic blocks.
> At least in the test case for that bug report, the relevant code is later deleted (perhaps it is unreachable), and so this does not cause a problem. Unfortunately, when vectorizatio...
2012 Oct 22
0
[LLVMdev] Self-referential instruction from jump threading
Hal Finkel wrote:
> Hello,
>
> After investigating PR14133, I've discovered that jump threading can output self-referential instructions:
> %inc.us = add nsw i32 %inc.us, 1
>
> At least in the test case for that bug report, the relevant code is later deleted (perhaps it is unreachable), and so this does not cause a problem. Unfortunately, when vectorization is enabled, this instruction causes BBVectorize to h...
2006 Aug 15
2
How to access attribute in a self-referential many-to-many relationship
Hello List,
I created a self-referential many-to-many relationship (as described
in the book Rails recipe #18), where I have a model that has
many-to-many relationships with itself. In this case, it''s person who
can become friends. The join table looks like this:
mysql> select * from friends_people;
+-----------+-----------...
2006 May 29
2
foreign keys and referential integrity
...handling this would be to enforce it in
the database and when a database operation failed I''d try to validate
the model to produce an error message. It''s always served me pretty
well.
Rails expects you to validate before commiting but of course this does
nothing to guarantee referential integrity. It''s perfectly possible for
one process to alter the database between another processes validation
and commit. Or am I missing something?
Lets say I go with the flow anyway but try to fix this short comming by
using the database to enforce referential integrity. So I fi...
2006 Aug 13
10
does rails enforce referential integrity???
Hi,
Is rails supposed to support referential integrity? That is rails
either support to be able to ensure that when a new contact is created
this can only happen if a valid suberb is associated with it, and which
mechanisms of the below are supposed to do this?
(a) using DB foreign key constraints information as a basis?
(b) using the...
2012 Jul 06
2
[LLVMdev] Self-referential function pointer
...trinsic to the
language.
With LLVM 2.9, the solution was to create an OpaqueType when creating the
function type signature, use the OpaqueType as the function pointer
argument type, and then finish the function type signature later. No
problem.
If I'm not mistaken, only StructType can be self-referential in LLVM 3.0
and beyond. So, is it not possible to have a self-referencing FunctionType,
short of making the function pointer formals var args? Has anyone developed
a solution for similar behavior?
Ty,
Cameron
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2007 Jul 26
1
Bi-directional self-referential HABTM
Hi,
I''m having a little trouble figuring out how to make a self-
referential HABTM bi-directional.
I have a Employee class. Each employee can have a couple of bosses,
who are also employees. The employee class has the following HABTM:
has_and_belongs_to_many :bosses, :class_name =>
"Employee", :join_table => "bosses_courses", :association_forei...
2006 Feb 25
0
self referential habtm using join tables
All:
I have been working on making a self-referential habtm relationship
that uses a join model because I want to store info about the
relationship. I have been using two sections from Chad Fowler''s "Rails
Recipes" as a guide, "Self-referential Many-to-Many Relationships" and
"Many to Many Relationships Where the Re...
2006 Feb 27
0
self-referential many-to-many using a join model
Hello!
I have been working on making a self-referential habtm relationship
that uses a join model because I want to store info about the
relationship. I have been using two sections from Chad Fowler''s "Rails
Recipes" as a guide, "Self-referential Many-to-Many Relationships" and
"Many to Many Relationships Where the Re...
2006 Mar 31
6
Adding objects to a :through association
So I''m one of those nasty people building a self-referential
habtm-like Association using the funky new :through stuff. This is
about users having friends, so here''s my user.rb:
class User < ActiveRecord::Base
has_many :friendships, :foreign_key => ''user_id''
has_many :friends, :through => :friendships, :source =>...
2006 Mar 05
1
Help with Self-Referential HABTM
With the help of the Rails Recipes have got a self-referential HABTM
relationship working, but I''m really struggling with getting a new entry
from a form accepted. i should say here that the form is also submitting
info for the join table too.
So in my model I have:
class Type < ActiveRecord::Base
has_and_belongs_to_many :subtypes,
:cl...
2006 Jul 20
1
self referential xml using builder
Hi listers,
I''m trying to build an xml doc using Builder, but I''m having trouble
getting it to draw a tree structure from a self-referential table.
Here''s what I''m after:
==========================
---- object structure ----
node (name => root)
- node (name => child 1)
- node (name => child 2)
- node (name => child 2.1)
- node (name => child 2.2)
-- should become --
<node name=&qu...
2006 May 02
0
Self-referential MtoM implementation
ok, guys i have followed the self referential recipe from the book it
works perfect but now i have some doubts, at the end the model are
modified to force the user beign added as a friend that add too who are
adding him so how i can make that the full relationship doesn?t be
complete until the friend beign added approves it(talking in th...
2006 Apr 17
0
Pros/cons of doubling up in Self-Referential has_many via :through
Relative newbie so would welcome comments re structure of a
self-referential relationship I''ve got.
It''s started off similar to the Person HABTM friends in the Rails
recipes books (working fine), but I needed to turn the join table into a
full-blown model as I wanted to add attributes to it. Few tricky bits
dealing with the new :through structure and...
2008 Jan 23
1
Self-referential HABTM SQL mal-formed when updating record
Guys,
Anyone ever had this kind of problem with ActiveScaffold?
Cheers, Sazima
------------------------------------------------------------------------------------------------
What steps will reproduce the problem?
1. Create self-referential HABTM application (like the common "user
has friends" example)
2. Try to add more than 1 friend to a given user using ActiveScaffold.
What is the expected output? What do you see instead?
2+ friends related to the user. Instead I get a MySQL error:
ActiveRecord::StatementInvalid (Mys...
2006 Mar 25
0
Self-Referential Many-To-Many relationships where the relationship itself has data.
Trying to model a bunch of users that have friends that are other
users. clearly a job for has_and_belongs_to_many, but the trick is,
they have ratings for their friends. I have gone through the Rails
Recipes book, and it seems like I''m trying to combine the
self-referential many-to-many recipe (12) and the many to many
relationships where the relationship itself has data recipe (16). So
users have unique names, and friendships have user_id''s, friend_id''s,
and ratings. And here''s the model code:
class User < ActiveRecord::Base
has_and...