similar to: Frozen hash problem

I have LabGroup and LabDesc which have many through LabDescGroup. I''d like to identify LabDescs which don''t have a LabGroup. This works: x = [] LabDescGroup.find( :all, :select => ''DISTINCT lab_desc_id'' ).each{ |c| x << c.lab_desc_id } y = [] LabDesc.find( :all, :select => ''id'' ).each{ |c| y << c.id } notfound = x - y But

Hi, I''m having some problem with getting collection_select to return the current value when editing a record. According to everything I''ve seen, there was an issue but it''s been fixed, but I can''t figure out why it isn''t returning the current value as a selected option. I''ve checked the table structures, and both the call_driver.product_line_id

Hi, I am using attr_accessor attributes in model class and assigning the values to attr_accessor dynamically in controller. And am sending the data object to display in Yaml format. I am getting the response along with changed_attributes but I don''t want changed_attributes details in my response. build Model code class Test < ActiveRecord::Base attr_accessor: t_1, t_2, t_3, t_4 end

Hi, Just wondering when one would use "include" over "extend"? Both seem to bring in methods to the class no? The context is I''m just trying to understand why both are used with the acts_as_audited plugin: Full extract from plugin (used within here): ================================================== # Copyright (c) 2006 Brandon Keepers # # Permission is hereby

I''m having a real problem with nil objects in a view I''m playing with. if I type ... <%= debug lesson.lesson_register.attendees %> I get the following displayed in the browser .... - !ruby/object:Attendee attributes: enrollee_id: "25" created_at: 2009-08-27 15:10:41 updated_at: 2009-08-27 15:10:41 id: "1" attended: f

Hello. The acts_as_versioned plugin works fine ... till the adjunction of optimistic locking via the lock_version table column. Here is the problem description: Without optimistic locking things are fine: # ++++ The table creation migration ++++ % cat db/migrate/001_create_tables.rb class CreateTables < ActiveRecord::Migration def self.up create_table :softwares,

Dear List As a fairly new R programmer I seem to have run into a strange problem - probably my inexperience with R After reading and merging successive files into a single data frame, I find that order does not sort the data as expected. I have multiple references in each file but each file refers to measurement data obtained at a different time. Here's the code library(reshape) #

HI, I am using Windows XP and R version 2.9.2. I have a data frame written by R similar to the following: Lab_ID Analysis_Soil Results -4MAD -2.5MAD +2.5MAD +4MAD 55003 Calcium-2008-116 900 961 1121.5 1656.5 1817 55003 Calcium-2008-117 3321 2175 2380.5 3065.5 3271 55003

I am new to the Samba world and need to port the Samba setup from an old server running BEL Server (RedHat under the hood) with Samba 3.0.25 to a RedHat EL 5.2 server with Samba 3.0.28, but some of the share access is not working. After copying over the smb.conf file I ran testparm and had issues with the oplocks so I commented out the entries referring to oplocks (also the docs indicated that

Hi Gurus, I''m trying to tackle a drop down list. I have category and item dbs, and they''re wired up with category has_many :items and item belongs_to :category, and an item has a category_id. I have this code in my new/edit.html.erb for item: <%= f.collection_select :category_id, Category.find_main, :id, :header, {}, :multiple => false %> And a pretty drop down list

How can I stop the following warning from occuring? invalid factor level, NAs generated in: "[<-.factor"(`*tmp*`, iseq, value = structure(1, .Label = "12", class = "factor")) The Label messages are for "5", "8", "12" and "46". I want the NAs to be generated as needed. Is this causing R to slow down by generating the warning

I was wondering if someone familiar with survival analysis can help me with the following. I would like to fit a Weibull curve, that may be dependent on a covariate, my dataframe "labdata" that has the fields "cov", "time", and "censor". Do I do the following? wieb<-survreg(Surv(labdata$time, labadata$censor)~labdata$cov,

Hi, I''ve got a problem on which I''ve spent many hours, and I can''t get a clue on what is happening... I hope someone here will be able to help me. Here is the situation : my Rails app uses acts_as_commentable and acts_as_bookmarkable on a Diagram model. Everything''s working OK individually: I can create a comment on a Diagram, bookmark it, and so on. Now,

Hi All, I have some strange problem which appears only on heroku hosting 2.3.5 default stack (not on my local computer) I have some models. Here they are: class Contact < ActiveRecord::Base belongs_to :user belongs_to :type, :class_name => "ContactType", :foreign_key => "type_id" validates_presence_of :name, :on => :create, :message =>

I''m a fairly visual person, and I have a piece of paper with many boxes and arrows with labels like "has many" and "belongs to" for my database models. It''s messy, but it works. What I keep looking for--weeks, actually, I''m certain it''s out there, but I haven''t hit on the right set of Google query terms :)--is something that will

What is this error message about and how do I troubleshoot it? > sqlTables(channel) Error in .Call("RODBCFetchRows", attr(channel, "handle_ptr"), max, buffsize, : negative length vectors are not allowed The channel was created as such channel <- odbcConnect("Labdata") I think this is telling me that my odbcConnect command worked >

I want to write a validate routine to check to enforce that a position must be unique in a category. (In another category, it doesn''t have to and shouldn''t need to be unique.) I write this code which works happily for new items: def position_in_category_not_unique @items = Item.find( :all, :conditions => [ "category_id = ? AND position = ?", category_id,

Dear R-experts, I have the following "long" data frame: ID <-

I am having trouble using get.bnddata() in the RArcInfo package. I installed the version 0.2 binary of the package for Windows and am using R 1.4.1 on Windows NT 4.0. I have had no problems importing and plotting arc data with get.arcdata() and plotarc(). plotpal() also works fine. I've been able to use get.arcdata(), get.labdata(), get.paldata(), get.tablenames(), get.tablefields(),

Hi Gurus, I''m learning the Rails framework, and I have this exact block of html/javascript in two places in an if/else construct in application.html.erb: <body onload="Modalbox.show(''<div class=\''warning\''> <p> <center> <%= flash[ :notice ] %> </center> </p> <p> <center> <input