similar to: Nuby: HABTM and drag-and-drop views

Hello, Is it possible to have several HABTM-relationships for the same object? Example: Imagine I have 3 objects (classroom, student, teacher) and define the associations for the student as: class Student < ActiveRecord::Base has_and_belongs_to_many :classrooms has_and_belongs_to_many :teachers class Classroom < ActiveRecord::Base has_and_belongs_to_many :students class Teacher <

I have two classes Person and Job defined as follows: class Person < ActiveRecord::Base :has_and_belongs_to_many jobs def add_job(job_name) job = Job.find_by_name(job_name) # See if this job exists if job.nil? # If this job doesn''t exist job = Job.new # Create a new job job.name = job_name #

Hola, Esta pregunta la hice en stackoverflow <http://stackoverflow.com/questions/31137940/randomly-assign-teachers-to-classrooms-imposing-restrictions/31143808#31143808>pero nadie pudo contestarla. 1. Quiero generar N escuelas, con G grados y C divisiones. 2. Quiero asignar cada uno de T maestros a 2 divisiones en un grado y escuela Si tengo C=4 divisiones, puedo lograr lo que quiero con

Hola, 0. La falta de 'elegancia' hace que sea mas dificil hacer cambios al codigo. Por ejemplo cambiar n.classrooms <- 4 a n.classrooms <- 20 1. Cuando tengo solo 4 puedo hacer esto: schoolGrade$A <- Teachers$Teacher.ID[1:cuttoff1] schoolGrade$B <- Teachers$Teacher.ID[1:cuttoff1] schoolGrade$C <- Teachers$Teacher.ID[(cuttoff1+1):n.teachers] schoolGrade$D <-

Gracias Carlos, Tu codigo es un gran paso en el sentido correcto pero no produce exactamente lo que estoy buscando. Mi "solucion" en stackoverflow <http://stackoverflow.com/questions/31137940/randomly-assign-teachers-to-classrooms-imposing-restrictions/31143808#31143808> produce un data frame `schoolGrade` con 240 observaciones y 7 variables. Mi objetivo es poder generar un data

Perdon por no se lo suficientemente claro :( Tu codigo produce `validPairs` que tiene 7 variables y 360 observaciones. Donde > validPairs[1,] V1 V2 V3 V4 V5 V6 valid 60 e1 g1 c1 e1 g1 c2 Valid indica que un maestro tiene asignado c1 y c2 en la escuela e1 y el grado g1. Correcto? Si es asi, esto es casi lo que queira producir y creo que puedo llegar a donde quiero usando tu codigo de base.

I''m using Edge Rails and the new has_many :through in my code. What I''m trying to do is modify my create and update code to use the new relationships. I''m using a table called course_teachers for the joins. Here is what I have so far: def create @course = Course.new(params[:course]) @teacher = Teacher.find(params[:primary_teacher]) @course.teachers =

Hello, i have a strange problem here. I have made a teacher controller using scaffold. All actions work fine but the delete does not. When i click the delete link, it redirects me to the edit of this teacher. I have restarted the server and i have tried in firefox (i use chrome) but problem still remains. Here is the code from my view. <%= link_to(image_tag("/images/

I wonder if you can have more than one has_many :through association between 2 models. For example... I have a model Teacher and a model Class Now, 1 Teacher works in many Classes, right?. So I need a join model like class Work < ActiveRecord::Base belongs_to :teacher belongs_to :class end But I also would like to know if a teacher CAN teach a class before I

So i have one table of data, each data object has two owners from the users table. so it''s data table id owner1_id owner2_id --------------------- 5 1 2 10 1 2 owner table id name --------------- 1 bob 2 cornholio so when i pull records from the data table for owner1_id how would i access the name field of owner id 2? -- Posted via

Hi, I posted yesterday asking how to get form tags to reference the associated objects in a habtm relationship. I was hoping for Rails Magic, but it looks like Rails doesn''t have habtm magic beyond a certain point. Here was my solution for others who might have the problem. Also, I hope someone shows me that there is a simpler way. The Database Model: class Registration <

Hello, I have a simulated data structure in which students are nested within teachers, and with each student are associated two test scores. There are 20 classrooms and 25 students per classroom, for a total of 500 students and two scores per student. Here are the first 10 lines of my dataframe "d": studid tchid Y time 1 1 1 -1.0833222 0 2 1 1

Imagine I want to track people, and the clubs that they belong to. table people with columns person_id, person_name table clubs with columns club_id, club_name And I have the association table: table clubs_people with columns person_id, club_id Now I know how to do this habtm between the two, in order to associate people with clubs that they belong to. However my application also needs a

Hi, I have a active directory domain of windows 2000. inside AD i have three user groups. Teachers, students and administration. every user has his home directory created on the fly. the umask is 0022. now what i want is that apart from users accessing there home directories there should be some other folders too which they can access. like teachers would like to access the

I had this problem some last year and never got it figured out. Now it is bugging me. It seems that sometimes when a student writes his/her file to a directory, it will not keep the correct group. It puts his/her main group as the group owner and that fouls things up. Here is what I have. Unix Permissions /school 3777 admin.teacher /school/bhs 3777 admin.teacher /school/bhs/reese

Hello, I have a question about HABTM and counting records. I have these models class Sort < ActiveRecord::Base has_and_belongs_to_many :reports end class Report < ActiveRecord::Base has_and_belongs_to_many :region has_and_belongs_to_many :subjects has_and_belongs_to_many :sorts end And i would like to get a count like @sort.reports.count The problem is get this query:

Here is the schema that I am working with: courses -> courses_teachers <- teachers I want to ensure that a teacher is not assigned the same course more than once. In other words, if I''m in the courses_teachers table as teaching Spanish 101, if someone tries to add that same teacher/course combination to the table again, it will not be allowed. I thought I could use something

I have a class Player, and a class Game. Game has two HABTM relationships to the Player table through seperate relationship tables. class Game < ActiveRecord::Base has_and_belongs_to_many :players, :uniq => true has_and_belongs_to_many :victors, :class_name => ''Player'', :uniq => true end When I add Player A to players, and Player B to victors, and save the

I have a problem related with the HABTM relationships with checkboxes. I''ve got a profile and a service model, both related with has_and_belongs_to_many. The problem is that i can insert new data in the profiles_services table, however, i cant delete already existing data. What could be the problem? --~--~---------~--~----~------------~-------~--~----~ You received this message

Hi All, I''m super a super ruby nuby, so bare with me. I am working on a small app that has a particular form that I am having a rough time figuring out the best to way to handle. Basically here it is, each school has one or more classrooms, and each classroom can have one or more teachers. Here''s what I am trying to do (edit a school): - click on a link to edit a School -