similar to: updating records in a many-to-many relationship

I''ve read through my RoR books and I can''t seem to find the solution. This is a pretty basic, easy, and practical application for RoR. If you guys know of any resources on the net to answer these questions let me know. Question 1: Basically, I have a many-to-many relationship that I want to add records to. I use something like this to add records in the A_B table:

Hey guys, Maybe someone could point out what wrong here. I''ve simplified the issue to this: Both User.find(6) and Sport.find(1) exist, Im just trying to setup the relationship between them. My controller looks like this def tester @c = User.find(6) @c.sports = Sport.find(1) end And I keep getting this error: undefined method `each'' for #<Sport:0x36a3488

# Get a list of product ids from a form, then # sum the total price product_list = params[:product_ids] total = Product.find(product_list).sum(&:price) I understand the first list line and part of the second line, but what does the & symbol mean? TIA.

Hello all I am wondering how rails handles case sensitivity in databases. If I do a Person.find_all_by_name("tim") in mysql I would expect to get tim, TIm, and Tim. Do I only get tim in postgres? How do other people deal with this? Do you resort to find_by_sql for all your postgres queries to get case insensitive results?

I am new Ruby on Rails, so excuse me if my question seems pretty obvious. I am trying to validate uniqueness of a filed: class EventType < ActiveRecord::Base belongs_to :sport validates_uniqueness_of :event_type end When I run it, I get this error message: Showing /event_type/new.rhtml where line #27 raised undefined method `each'' for nil:NilClass <select

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 mapping in my ruby model

Hi Community.... I''m new in this game, so this might be a easy question, but I have done my google, without result, so I will try this.... I''m learning ROR, and I''m using Patrick Lens ''Ruby on Rails'' book. (This is written for ror 1.x - and I''m using NetBeans 6.1 - ror 2.x - this might be the problem...) But... I have made this

Hi, It works for me to import spss datasets via library(foreign) with read.spss or via library Hmisc by (spss.get). But no matter which way I do import the data, user-defined missings from Spss are always lost. (it makes no difference if there are a single value, a range, or any combination of them. They are always ignored). Is there any way in R to find out if any value was user-defined missing

Hi everyone, I am a newbee in RoR and i could use some help. I have a select box populated by: <select name = "test_company" id = "test_company"> <option selected value=test.company.to_s>Create New </option> <%= options_for_select Company.find(:all, :conditions => ["name =?", test.company], :order => "id asc").collect{|c|

Anybody encounter this. I know the method exists in the auto_complete.rb file in my rails installation, but it itsnt accessing it throught he program. Any ideas? -- Posted via http://www.ruby-forum.com/.

Dear Rails List, I am new on the list so will assume straight away that this question has been answered before. As I can see no immediate way of searching the list, I will ask the question. I apologize in advance for any disruption this may cause. Question time: I am trying to write a web application for the staff at my office to play a form of virtual Super14. Its a bit like any of the

Le 30/09/2019 ? 17:53, Gwaland a ?crit?: > looks like it was updated due to a segfault. > https://bugzilla.redhat.com/show_bug.cgi?id=1750550 > https://bugzilla.redhat.com/show_bug.cgi?id=1253662 Now I'm even more puzzled. Fedora and EPEL sport SquidGuard 1.4.36. Now when you search for "squidguard", this seems to be the project site: * http://squidguard.org/index.html

I''ve looked at the API on this but can''t quite see what I''m missing from my call <select id="pay[pay_id] name="pay[pay_id]"> <%= options_from_collection_for_select( Pay.find_all_by_name, "id", "name") %> #<- line 5 </select> is returning - Showing app/views/kr/index.rhtml where line #5 raised: wrong number

If @c is an instance for the User class and lets say I want to call @c.pictures, which would be the user''s pictures. How can I setup up RoR so that I could append the condition "status=''available''" to the conditions arguments EVERYTIME .pictures is called. This way I can only call available pictures Is there some kind of filter I can apply to the

I am following the instructions on how to use RESTful Rails plugin found at http://www.xml.com/pub/a/2006/04/19/rest-on-rails.html?page=3. When I run the rake test:functionals I get the following error message: rake aborted! undefined method `first'' for :book:Symbol (See full trace by running task with --trace) How can I fix this problem? I am using Rails 1.1.4 version. TIA

I have to answer the following question for a homework assignment. A researcher was interested in whether people taking part in sports at university made more money after graduating, taking into account the students' GPA. They sampled 200 alumni from a large university. The variables are: income (income 10 years after graduating), sports (1 if they did sports, 0 if they did not), and GPA (the

Caldarale, Charles R schrieb: > You have not provided us with the declaration for f(). Unless its argument is marked with the nocapture attribute, the compilation of g() cannot assume that f() has not retained a pointer to the x struct and is using it in the second call. > thanks a lot for the input. Yes, I forgot to that. The C function declaration would have been void f( struct a_b

Hello since my broad RFC request didn't catch any responses, let me get a bit more into the nitty-gritty: I tried to get llvm (3.7) to optimize superflous allocas away, but so far I haven't figured out how. Is there no optimizer for this ? Should I adorn something with some attributes ? As far as I can tell no, but I am no llvm expert... For what I want to do, i will probably have a

Hi, I'd like to know if it is possible to use wildcards * for indexing... E.g. I have a vector of strings. Now I'd like to select all elements which start with A_*? I'd also need to combine that with logical operators: "Select all elements of a vector that start with A (A*) OR that start with B (B*)" Probably that is quite easy. I looked into grep() which I think might

Hello all, I'm trying to run Football Manager 2009 under Wine. I installed the application; But see what's happening. wine fm.exe err:service:validate_service_config Service L"Macsvmgbbsbs" has an unknown service type err:service:scmdatabase_load_services Invalid configuration of service L"Macsvmgbbsbs" - skipping fixme:actctx:parse_depend_manifests Could not find