similar to: validation for items in a 1 2 many

Hi, I am pulling my hair out trying to work out how to put together what should be a simple app in rails. The app is to CV''s so I have a table of CV''s and each CV can have multiple skills. Skills are in a 2nd table below; CREATE TABLE cvs( id INT not null AUTO_INCREMENT PRIMARY KEY, first_name VARCHAR(30) not null, family_name VARCHAR(30) not null, email

Hi! If i have 2 tables i.e. product and images and product has_many images, image belongs_to product - how to create _form.rhtml, new/create and edit/update methods in product controller, so in a single form i can add one product and MANY (let''s assume for now that this number is fixed) images for this product? Pleeeeease help me :) -- Posted via http://www.ruby-forum.com/.

In a partial that renders another partial, I would like to change the items I am rendering based on the content of a variable. So instead of having 5 partials which all have variations on this; <% for @skill in @cv.skills %> <%= render :partial => "skills" %> <% end %> If item = "skill" would like to do something to this effect; <% eval("for

I am having trouble getting error_messages_for to work. My controller(relevant parts) looks like def configure @account = session[:account] @user = User.new end def add_new_user_to_account @user = User.new(params[:user]) if @user.valid? session[:account].users << @user end redirect_to :action=> ''configure'' end end and my

Hi all, I''ve been searching the web and the list archives for help on this and I''ve found some tips, but I''ve been racking my brain on this for hours. I have a Model, View, and Controller that are handling the uploading of a file to my server. I want to make sure that the description is set and that a file is selected to be uploaded. I have set validates_presence_of

I am trying to understand why model validation error reporting in Rails is so complicated compared to non ajax model validation. In my normal form I use <%= error_messages_for ''user'' %> in my view and I get a nice error message displayed when the user inputs invalid information into the form. When I convert that form to use Ajax using form_remote_tag the

I have the following setup: A model: that validates using helpers like: validates_presence_of, etc.. A view: called ''new'' which renders a partial The partial: _form which has error_messages_for and a form_remote_tag , submit_tag and end_form_tag An action ''create'': that gets executed via the submit_tag in the _form and which in case it can''t

Hello, I''m have a form and the error messages are not being displayed properly I got a remote_form_for and am trying to show errors like I always do: <%= error_messages_for @user%> but the output is: 4 errors prohibited this user from being saved There were problems with the following fields: * {{attribute}} {{message}} * {{attribute}} {{message}} * {{attribute}}

Greetings, We are currently hiring experienced Ruby / Rails developers to work with our small team at Default / Springbolt. Below is the job description as shown on our (holding) website: http://www.springbolt.com/jobs.htm Please reply off-list with any interest or questions. Thanks for your time. Guy Below is the job description: London based company seeks Ruby / Rails developers to join

Georges Monette and I would like to announce a new package, cv, now on CRAN, which implements cross-validation of regression models. Some of the functions supplied by the package: - cv() is a generic function with a default method and computationally efficient "lm" and "glm" methods, along with a method for a list of competing models. There are also experimental

Georges Monette and I would like to announce a new package, cv, now on CRAN, which implements cross-validation of regression models. Some of the functions supplied by the package: - cv() is a generic function with a default method and computationally efficient "lm" and "glm" methods, along with a method for a list of competing models. There are also experimental

Hi, I was trying to get the optimal 'k' for the knn. To do this I was using the following function : knn.cvk <- function(datmat, cl, k = 2:9) { datmatT <- (datmat) cv.err <- cl.pred <- c() for (i in k) { newpre <- as.vector(knn.cv(datmatT, cl, k = i)) cl.pred <- cbind(cl.pred, newpre) cv.err <- c(cv.err, sum(cl != newpre)) }

Folks; I am having a problem with the cv.glm and would appreciate someone shedding some light here. It seems obvious but I cannot get it. I did read the manual, but I could not get more insight. This is a database containing 3363 records and I am trying a cross-validation to understand the process. When using the cv.glm, code below, I get mean of perr1 of 0.2336 and SD of 0.000139. When using a

Hello, I did a cross-validation using cvlm from DAAG package but wasn't sure how to assess the result. Does this result means my model is a good model? I understand that the overall ms is the mean of sum of squares. But is 0.0987 a good number? The response (i.e. gailRel5yr) has min,1st Quantile, median, mean and 3rd Quantile, and max as follows: (0.462, 0.628, 0.806, 0.896, 1.000, 2.400) ?

Hi, all When I am using mle.cv(wle), I find a interesting problem: I can't do leave-one-out cross-validation with mle.cv(wle). I will illustrate the problem as following: > xx=matrix(rnorm(20*3),ncol=3) > bb=c(1,2,0) > yy=xx%*%bb+rnorm(20,0,0.001)+0 > summary(mle.cv(yy~xx,split=nrow(xx)-1,monte.carlo=2*nrow(xx),verbose=T), num.max=1)[[1]] mle.cv: dimension of the split subsample

Dear all, Help me get a simple AJAX behavior right. I know zero AJAX, thus please advice. Below is a simplification of the real code and I hope I can describe my intention clearly. class StoreController < ApplicationController def show_cart @cart = Cart.new @new_item = CartItem.new end def add_item @new_item = CartItem.new(params[:new_item]) if

Dear all, Help me get a simple AJAX behavior right. I know zero AJAX, thus please advice. Below is a simplification of the real code and I hope I can describe my intention clearly. class StoreController < ApplicationController def show_cart @cart = Cart.new @new_item = CartItem.new end def add_item @new_item = CartItem.new(params[:new_item]) if @new_item.valid?

Hi; I have the following setup: A model: that validates using helpers like: validates_presence_of, etc.. A view: called ''new'' which renders a partial The partial: _form which has error_messages_for and a form_remote_tag , submit_tag and end_form_tag An action ''create'': that gets executed via the submit_tag in the _form and which in case it can''t

Hi, I have developed a logistic regression model in the form of (factor_1~ numeric + factor_2) and would like to perform a cross-validation or some similar form of sensitivity analysis on this model. using cv.glm() from the boot package: # dataframe from which model was built in 'z' # model is called 'm_geo.lrm' # as suggested in the man page for a binomial model: cost <-

Good Day All, I have a negative binomial model that I created using the function glm.nb() with the MASS library and I am performing a cross-validation using the function cv.glm() from the boot library. I am really interested in determining the performance of this model so I can have confidence (or not) when it might be applied elsewhere If I understand the cv.glm() procedure correctly, the