similar to: n-way joins

Hi, I''m trying to figure the most efficient way to model the following. I can think of at least two ways to relate the tables but from a client/server perspective! I''m wondering how to best (and elegantly)relate them from an AR perspective. A project has many people, A person can work on many projects at any time, A project has many roles, A role is performed by a person, A

Hi, I am new to Ruby and Rails programming and am having difficulty with the following scenario... Consider the following model: class Studio < ActiveRecord::Base has_many :movies has_and_belongs_to_many :actors end class Movie < ActiveRecord::Base belongs_to :studio has_and_belongs_to_many :actors end class Actor < ActiveRecord::Base has_and_belongs_to_many :studios

Hello again: I''m hoping that somebody, anybody, can help with this question. How do I make sure that records in a join model are unique? Using the scenario outlined in Chad Fowler''s "Rails Recipies", number 16, "Many to Many Relationships Where the Relationship Iteself Has Data". Here are the tables: create_table :magazines do |t| t.column :title,

Hey everyone. I really stuck on testing a nested controller. I''m trying to make a request using get and afterwards checking the response by response.should ... My routes.rb looks like this: map.resources :writers do |writers| writers.resources :notes end In my notes_controller_spec.rb def do_get writer_id = 1 note_id = 1 get note_path(writer_id, note_id) end it "should

Hey everyone. I really stuck on testing a nested controller. I''m trying to make a request using get and afterwards checking the response by response.should ... My routes.rb looks like this: map.resources :writers do |writers| writers.resources :notes end In my notes_controller_spec.rb def do_get writer_id = 1 note_id = 1 get note_path(writer_id, note_id) end it "should show

Hello, I am quite new to Rails and i was wondering if i could get some help to populate a join table? I got (for example) a table called films, a table called acteurs and a join table called acteurs_films. I have specified the HABTM relationship and I manage to do it through the console by doing: acteur=Acteur.new acteur.name="blabla" acteur.films << film acteur.save and

Hi everyone! I have a problem with defining 2 fk referencing the same table. I have a Program table and a Team table. The Program should have an away team and a home team fk. From my understanding, "the fk column should be named after the class of the target table, converted to lowercase, with _id appended". But, in my case, I have 2 fk referencing the same table. How can I do this?

Hello. Has any further action been taken regarding implementing David Simcha's fast Kendall tau code (now found in the package pcaPP as cor.fk) into R-base? It is literally hundreds of times faster, although I am uncertain as to whether he wrote code for testing the significance of the parameter. The last mention I have seen of this was in 2010

Hello folks, I use to think that a relational databases without foreign keys constraints enforced strictly by the RDBMS were no good, piece of crap, data junk. However, I''ve also learned the hard way that FKs constraints imposes serious difficulties when moving data around, specially between different DBs, or for loading test data or for upgrading DBs schemas, or for porting DBs

Hi all, I am new to R-project my problem is I tried to get subset from two different tables its giving error but if i m tring for geting results from one table its working actually i have to take values from two tables with applying different conditions on two tables like kk- is an object of one table and fk- is an object of another table here i have to get values from these tables like

hey! I have the following table structure in my DB | users | ------------ | (pk)id | | username | | pass | ------------ (1:n) | users_objects | | objectattributes | ------------------ ---------------------------------- | (fk,pk)user_id | (1:n) | (pk)attribute | |(fk,pk)object_id| | (pk,fk)

All, I want to run automated unit tests as part of my build. I am building to my test environment. Upon successful completion of all of my unit tests, I would then like to load some data (using a fixture, I imagine) into my test database that will act as fresh "system test" data for my users to play with. What is the best way to "load the standard system test/user acceptance

Hi Paul, Thanks for the quick response! We use the same type of encoder (Sam Cast) both live for both mountpoints on 96 Kb Joint Stereo. it is difficult to see if it is exactly the same. Is there a player that show exactly this? I will check this. We have use the limit-rate in our config. Thats work better for go to play the last fallback-mount file (i test this). See here our part of the

Dear useRs, I want to plot the following barplot with lines instead of bars. Is there a way? data <- data.frame(cbind(k = 0:3, fk = c(11, 20,7,2), f0k = c(13.72, 17.64, 7.56, 1.08), fkest = c(11.85, 17.78, 8.89, 1.48))) d <- t(data[,2:4]) barplot(d, beside=TRUE) Regards, Rafael. ____________________________________________________________________________________ [[elided Yahoo

Chris, Finally got time to fully play with your suggestions. Had to re-code a bit of stuff but the concept works - just like a bought one :~). Many thanks for the solution, Kind Regards, Eric. For those curious - here''s what it was about; On Monday 02 January 2006 02:10, Eric Sloane tried to type something like: > Hi, > I''m trying to figure the most efficient way to

When I create a child record I''m not automagically getting the parent ID put into the fk field. Does object.new take parameters that allows me to do that as part of the AR record creation? Or do I need to do it separately? Or am I missing the boat altogether ;-) Thanks, Bill -------------- next part -------------- An HTML attachment was scrubbed... URL:

I am trying to build a function in a context where the environment concept would appear to be useful. But I'm a bit foggy about this concept and would appreciate some pointers and advice. Basically the function I'm building, say foo(x,t), is a function of two variables). Depending on the value of t, foo will return one of the values f1(x), f2(x), ..., fk(x), where each of f1, ..., fk is

What happens when rsync'ing a file that is damaged bacause of a bad sector on the source medium? I assume that the file will be synchronized partially, overwriting any file of the same name on the destination medium. If that is the case, is there a way to make rsync check readability of files before overwriting them on the target medium (e.g. by synching to a temp. file and, once

Hello, I want to implement LLVM backend for a specific VLIW hardware. I am working on defining its instruction set, and assembly language. The hardware has two pipelines, int and float. Each pipeline can do 3 operations/cycle, 3 operations forms an instruction. One of the Integer Instruction looks like this: add Ri, Rj, Rk; add Rl, Rm, Rn; add Ro, Rp, Rq An int instruction and a float

Or is it ? Need to be able to :- @search = Form.find(:all, :include=>[:form_type, :form_type_items], :conditions=>....) I need in the Form model a :form_type_items, the question is, what is the relationship type? Current Models:- Form belongs_to :form_type FormType has_many :form_types has_many :form_type_items FormTypeItem Belongs_to :form_type Form ---------------- | id |