similar to: question about hashes in views that model a table?

hi, i have 2 tables (counties and towns). counties has_many towns and towns belong_to counties. now my question: i thought i would need to do is say @counties = Counties.find(:all). should that not return to me all counties in the counties table WITH all towns associated with each county? in my view i was getting error when doing this if(counties.has_towns?) saying undefined has_towns

Hi First off, I''m using Ruby 1.9.1p378 and Rails 2.3.8. I was creating a minimal application to test handling of Norwegian special characters when I bumped into this strange problem... I have a simple Car model with fields maker:string and model:string. For the controller I planned to just have an index action do all the work: class CarsController < ApplicationController def index

can someone help me with this i have a table cars ( id int model_id int make_id int color_id int description text constraint fk_cars_carmake foreign key(make_id) references carmakes(id), constraint fk_cars_carmodel foreign key(model_id) references carmodels(id), constraint fk_cars_color foreign key(color_id) references colors(id) ) carmakes ( id int carmake varchar ) carmodels ( id

Hello, I know it''s off-topic. But I''m sure you are using SQL and can help me ;) I''ve a table CARS and a table KEYS and a LOCKS table. CARS id|name 1|audi 2|ford 3|mazda 4|porsche ... KEYS id|car_id|lock_id 1|1|1 2|2|1 3|2|2 4|3|1 5|3|2 6|4|1 7|4|2 8|4|3 ... LOCKS id|name 1|main 2|spare 3|engine ... A car can have many keys. Keys are for different locks. How can I

Hi, I want to perform t-test in R for each individual car. Here is what i have. Is there a way i can test each car? The original table (test.csv) Car Tester2 Tester2 Controller1 Controller2 Audi 0.56 0.9 0.5 0.9 Toyota 0.2 0.9 0.9 0.2 Honda 0.5 0.9 0.1 0.5 BMW 0.2 0.3 0.5 0.7 > cars<-read.table("c://test.csv",header=T,sep=",", + skip=2,comment.char="")

Hello, I need to write a function that will return a link only if the current user is the owner. Here is my code... 1. application_helper.rb 2. 3. def link_to_if_owned(owner_id, anchor_text, where_to_go) 4. if current_user.id == owner_id # current user is owner 5. "#{link_to anchor_text, where_to_go}" 6. else 7. anchor 8. end 9. end And

hi folks, I was wondering if anybody could give me some advice. I've created a stacked barchart, with 'car model' along the x axis, 'number of cars' along the y axis. There are 45 individuals involved, each of which can own any number of cars, of any model (eg an individual could own two cars of one model, and another car of a different model). I've got a legend by the

Suppose I have the following models/migrations: class Car < ActiveRecord::Base belongs_to :manufacturer validates_presence_of :manufacturer validates_association :manufacturer end class CreateCars < ActiveRecord::Migration def self.up create_table cars do |t| t.column :name, :string t.column :manufacturer_id, :integer end end class Manufacturer <

I am just getting the hang of this, so forgive me if this is a stupid question... - I have two models/tables: Owners and Cars - Owners may have many cars. Cars have one owner. - Cars have a property named Color. Question: how do I get a list of all the Owners who have RED cars? I want something like this to work: Owner.find_by_car.color("RED") Thanks for any help! -- Posted via

Can someone please help me with this. I have an Images table :- create table images ( id integer unsigned not null auto_increment primary key, image varchar(200) not null default '''' )ENGINE=InnoDB default CHARSET=latin1; And a car table :- create table cars ( id integer unsigned not null auto_increment primary key, user_id integer unsigned not null, title varchar(100) not

I want to do a SQL query, but I haven''t created a model. For example, instead of Car.find(:all) I want to be able to use SELECT * from cars. I don''t have a Car model because this DB was not created with Rails (it''s from a PHP project). -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you

Hi, I'm trying to create a plot using pair. Currently I'm doing the following pairs(~mpg + hp + wt , data=cars, labels = c("Miles per Gallon","Horsepower","Weight"),pch = c(24,25)[unclass(cars$tr + 1)], bg = c("red", "green3")[unclass(cars$tr + 1)],panel=panel.smooth) for the attached dataset. However,instead of using panel.smooth I

Hello R usuer, The code given below superimposes a pie diagram on another plot containing some points. However, I would like to center the pie diagram on the xy location on the plot, but not on the center. is there any way to re-center pic diagram. Any suggestion or better alternative are highly appreciated. Thank you in advance for your help. Regards, Bibke library(visualFields) library(car)

On 7/2/2015 5:22 PM, Warren Young wrote: > If your car has a DIN 7736 bay, you can easily replace the existing head unit without redesigning the car. This is directly equivalent to repartitioning and installing CentOS alongside Windows. how many modern cars have DIN mount stereos anymore? almost all have some weird custom shaped dashboard specific stereo insert. sure, you can get DIN

Hello all and thank you for reading this message. I am new to RoR, and ruby too, but i am quite excited about it. I am developing a RoR project and with active record associations in the following manner # Tables (all tables have only one record) CREATE TABLE `webcars_development`.`cars` ( `id` int(11) NOT NULL auto_increment, `model_id` int(11) NOT NULL default ''0'',

Hi this is my first time with Rails and I''m having problems getting it to work properly. In the Database.yml file I have set up the following - development: adapter: mysql database: cars username: ***** password: ***** socket: /path/to/your/mysql.sock host: ***** But, when I launch the controler it says - NameError in Add_car#index uninitialized constant Car Where am I

On Tue, Feb 3, 2015 at 1:01 PM, Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: > >> >> Yes, computers and the way people access them are pretty much a >> commodity now. If you are spending time building something exotic for >> a common purpose, isn't that a waste? > > Do I have to take that people who are not sysadmins themselves just hate > an

Let's say you have a dataframe of car trade-ins. For example, each row contains oldcar newcar qty and a typical entry could be lexus bmw 1 I put the qty column to allow for fleet purchases, where one purchase may convert multiple cars at once. I'd like to show what's going on. I could do a histogram of newcar to show the frequency each type of car is bought. If there

Hi all I have another GLIM question. I have been using R as well as Genstat (version 6) in order to fit GLIM models to the data (displayed below). The same models are fitted but the answers supplied by the two packages are not the same. Why? Can anyone help? A discription of the data and the type of model/s fitted can be found below. Regards Allan The

Hi, I am teaching a one month class in applied statistics and want to bring my students up to speed in R without devoting much/any lecture time to R instruction. I think that the best way to do this is to provide them with a lot of R questions for homework. These questions would be numerous (there is a lot of material to cover), go from very simple to somewhat complex, and focus on all the