similar to: Sorting Using HABTM table joins

Hi, I am writing a function that requires a specific package to be installed. Is there a way of checking if the package is installed and returning a TRUE / FALSE result so my function can return an appropriate error message and exit the function gracefully rather than just bombing out? I'm thinking along the following lines (but want code that works), f_checkpackage <- function() { if

I am trying to get user authentication in a 200X AD to have domain users see the samba shares (RH ES3, samba 3.0.9-1). I can see the shares, but when I try to access any of the shares, I get prompted for a username and password and this is what shows up in the log.winbindd file ------------------- [2004/12/29 08:17:37, 1] nsswitch/winbindd_user.c:winbindd_getpwnam(161) user 'robl' does

I am looking for a little assistance with a problem I have with a simple table join using Rails. I am a relative newbie to both Ruby and Rails so any help would be greatly appreciated . I have two tables products and product_formats. create table products ( id int not null auto_increment, title varchar(100) not null, product_format_id integer

Hi there, I am trying to get something working and its driving me crazy. I have been looking around for solutions to getting view helpers working in models and for the most part I find this solution. Add the following in the model you want to use them in include ActionView::Helpers::UrlHelper include ActionController::UrlWriter However, when I try something like

Ok, David says on page 241 that sometimes a many-to-many relation with attributes are better implemented as an actual model instead of using HABTM. Well, I''ve got that situation and I can''t figure it out. All of the examples in the book have HABTM examples between 2 different tables, but I want to have a HABTM relation on 1 table with itself. (e.g., if I have a table Things,

i have a taskmanager type of project that i am working on, where i need to separate joins on the same two tables. i need one join for users that are assigned to the task, and another join for who has read the task, so they can tell which ones are new. any suggestions on the best way to accomplish this? thanks -- Posted via http://www.ruby-forum.com/.

ParseDecl.cpp fails to compile with MSVC reporting the following error: ParseDecl.cpp compiler\llvm\tools\clang\lib\Parse\ParseDecl.cpp(2760) : error C2248: 'clang::A STOwningResult<Destroyer>::operator =' : cannot access private member declared i n class 'clang::ASTOwningResult<Destroyer>' with [ Destroyer=::up▲ ]

Hi, I wonder if can quiz anyone on how to solve a problem. I use our Facebook app to take payments so we have to access our app outside of the Facebook Canvas for a few controllers (and only minimally). We have a system working fine and we have a token based login to ensure its the same user on the external pages. The problem is we want to perform an action, set some flash messages and

Hey, got a weird one. I''ve been playing with a couple of Rails 3 apps and today I have broken both. Seemingly by updating my paperclip gem. Gemfile ..... gem ''paperclip'', :git => ''git://github.com/thoughtbot/paperclip.git'', :branch => ''rails3'' It appears the latest version of paperclip or at least in the branch has broken in

Hi, I have three Models: User, Group and File. User habtm groups and Group habtm Files How can I find all files that a particular user has access to? eg user.groups.files ? As user.groups returns an array, the above doesn''t work. Id like to find the files for all groups in that array, without adding any code to the User model. Thanks in advance PS I just posted this in the

Hello, I think I have encountered an odd bug in Siemens C460 IP/dect handsets, which is a bit annoying, and I'm not (yet) sure how to get round it without lots of hacks. Basically, on all external incoming calls, we set: exten => s,n,SIPAddHeader(Alert-Info: Bellcore-dr2) This causes handsets (i.e. Cisco 7960 / Grandstream / aastra) to set a different ring cadence so to differentiate

Hi all, I''m trying to model self-referential relations between people, where the relation has attached data. John ''works for'' Bob Problem: '':through'' doesn''t work, and generates a NameError. => the models : Person (attr: name) Relation (attr: source_id, target_id) (more details below) ex: John ''works

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 there I have an habtm association between 2 Models. I regularly have to truncate the table on one side of the relationship and repopulate the table with a fresh csv file. I notice that f I do Model.delete_all, none of the records in my habtm join table get deleted, whereas if I use destroy_all they do. However, the overhead of using destroy_all is too great. For the amount of records I have

I have what I feel is a standard habtm association to manage user/roles/permissions. However, I''m having a small problem wondering why ".include?" isn''t working like I thought it should. I''m attempting to use this to determine whether a user has access to a particular permission: if session[:user].role.permissions.include?(''Lead List'')

Is there an easy way to paginate HABTM? Something like (which doesn''t work): @pages, @directories = paginate :directories, :include=>:categories, :per_page=>ITEMS_PER_PAGE directories and categories have an HABTM association. Joe -- Posted via http://www.ruby-forum.com/.

Hi, i have a ruby script which uses the activerecord models of my rails application. this is achieved with $LOAD_PATH << ''...../availdb/app/models'' require ''rubygems'' require_gem ''activerecord'' require ''host_downtime'' require ''host_scheduled_downtime'' And in .../app/models/host_downtime.rb: class

Hi, I''m trying to use collection_select with a habtm relationship. Let''s say you have two tables: books and authors with a many-to-many relationship. Is there any way in rails to render something like selection boxes for each author, so that the user can change them? I tried this (and several more variations) but it doesn''t work: <% for @author in @book.authors

All of my HABTM tables receive the parent created_on/last_update_on dates whenever a record is inserted into these join tables. I don''t have any defaults in the database or anything else populating these tables. I assumed rails would populate these automagically. Is there something that needs to be done to get this to populate with the correct current timestamp instead of

class User < ActiveRecord::Base has_and_belongs_to_many :projects end class Project < ActiveRecord::Base has_and_belongs_to_many :users end class ProjectController < ApplicationController def add_user @project = Project.find(params[:project_id]) @user = User.find(params[:id]) @project.users << @user unless @project.users.include?(@user) # I''d