similar to: update or alter cart

I''m doing the depot example in the Agle Web development book. I''m getting this error: "undefined method `product'' for #<BigDecimal:331ce70,''0.21E1'',8(8)> " "Extracted source (around line #9): 8: for item in @items 9: product = item.product 10: -%> 11: <tr> 12: <td><%= item.product%></td>"

I have looked at examples for this. I found a similar example in the Agile Web Dev... book but that didn''t help. Here''s what i am trying to do. A Cart has many line items. On the Display Cart page, I want to provide the user the option to update quantities. Here''s the rhtml code: <%= start_form_tag :action => ''update_cart'' %>

I am using this line on my index.rhtml page to capture the quantity required of a particular item for a basic shopping cart app: <%= text_field ''line_item'', ''quantity'', {:size=>3} %> </td> but my next screen (a cart screen) doesn''t reflect what was entered in that text field when the item is added to the cart. That is,

Hi, I have two objects: Contacts Lists I want to be able to add multiple contacts to multiple lists. I''ve created a linking table and a form that allows me to select the contacts using checkboxes, but I''m having some problems with the controller and model. I receive the following error message when I submit the form: Mysql::Error: Cannot add or update a child row: a

Instead of using numeric I created the field "unit_price" as PostgreSQL type money. Now when I try and add a row I get the following. How do I override AR default behaviour to cast numeric post data to money, or am I forced to only support database types that active_record knows about? RuntimeError: ERROR C42804 Mcolumn "unit_price" is of type money but expression is of

Dear all I am trying to fit Variable Coefficients Models on Unbalanced Panel Data. I managed to fit such models on balanced panel data (the example from the "plm" vignette), but I failed to do so on my real, unbalanced panel data. I can reproduce the error on a modified example from the vignette: > require(plm) > data("Hedonic") > Hed <- pvcm(mv ~ crim + zn + indus

Please can someone show me the correct syntax for a hidden field in forms, this is my code <%= start_form_tag :action => ''create'' %> <div class="form1"> <table width="auto" boader="8" cellspacing="5" cellpadding="5"> <% hidden_field ''line_item'', ''client_id'', :value

I''m trying to simply write to a mysql db from the console. Model = Entry , table = entries Problem is my values keep getting turned into instance variables and end up nil. >> Entry.create(:title =>"new title", :body => "Brand new body") => #<Entry:0x27178c4 @attributes={"body"=>nil, "title"=>nil, "id"=>6},

Hi all, How is dispersion calculated within the glm function in R ? Cheers _________________________________________________________________ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body",

Hola, Otra forma, utilizando la función de intervalos y la que comprueba si otro intervalo se solapa del paquete "lubridate": #---------------------- library(lubridate) fe.chas <- data.frame( entra=c('2001-01-01','2001-06-01','2003-01-01') ,sale=c('2002-01-01','2002-06-01','2004-01-01') ) ref <-

Hi all, I have a little function called format_price(price) that simply formats the argument as a dollar sign, dollar amount, dot and penny amount. Then, in a .rhtml file, I could do this: <%= format_price(item.unit_price * item.quantity) %> But where do I put the format_price() function definition? The app couldn''t find it in app/controllers/application.rb. Where do I put it

I went throught the "agile web developemnt with rails" and Now I''m trying to ''enhance'' the code with some extra options. When I go to admin/shipping I want to include some data from the products table in with the order info listed. I can''t seem to get this to work. in my partial form I''m trying to add this: <td

Hi Got a column named ''sku'' in a table named ''product'' <%= product.sku %> ...looks like this.... ''1234_56'' These last two chars (56) are an audio Track number. I ultimately want to display: Track <%= product.sku %> I can isolate the first part with /\d+\_/ = 1234_ But can''t figure out how to get the last two

Dear all, I'm having some problems with using the step() function inside another function. I think it is an environment problem but I do not know how to overcome it. Any suggestions are appreciated. I've prepared a simple example to illustrate my problem: > library(MASS) > data(Boston) > my.fun <- function(dataset) { + l <- lm(medv ~ .,data=dataset) + final.l <-

Buenas tardes, Tengo un data frame denominado “trabajadores”, que cubre desde el 1 de enero de 1997 hasta el 30 junio de 1999, con 3 columnas: Identificador (ID), la fecha de entrada en la empresa (ENT) y la fecha de salida (SAL). Deseo localizar aquellos trabajadores que, durante dicho periodo, NO han llegado a pasar un 31 de diciembre y un 1 de enero seguidos (cambio de año) como asalariados

? data=read.table("http://statcourse.com/research/boston.csv", , sep=",", header = TRUE) ? library(rpart) ? fit=rpart (MV~ CRIM+ZN+INDUS+CHAS+NOX+RM+AGE+DIS+RAD+TAX+ PT+B+LSTAT) Please: Show me the tree. Mark -------- Original Message -------- Subject: Re: [R] help with rpart From: "Stephen Milborrow" <[1]milbo at sonic.net>

Good evening. I have this following table and I would like to turn it into a matrix in which my rows would be filled with de "Sellers", my columns with my "Articles" and my data would be the mean unitary price used by each seller in each produt. Seller Art. Unit Price 1 v1 p1 9.148352 2 v2 p1 2.858073 3 v3 p1 3.775315 4 v4

This is being offered gratis till the end of december by Mackie. This one might just be coaxed into running under Wine which would be quite an achievement. Kudos: 1. The program, though free, needs be registered to a "machine number". Did this under Windows, did not get that far using Wine. Might need a second copy just for the Linux runs. 2. The program searches for all its own

I do the following to init flac: encoder = FLAC__stream_encoder_new(); e = FLAC__stream_encoder_set_do_mid_side_stereo (encoder, numChannels == 2); e = FLAC__stream_encoder_set_loose_mid_side_stereo (encoder, numChannels == 2); e = FLAC__stream_encoder_set_channels (encoder, numChannels); e = FLAC__stream_encoder_set_bits_per_sample (encoder, jmin (24,

I''d like to be able to comment out a few lines of RHTML code easily. With HTML you can just surround the code in <!-- ... -->, but if you do that with the RHTML, it still gets executed, then the resulting HTML is commented out. Sometimes I''d like to be able to leave the code in but not have it evaluated..usually just for quick tests, but sometimes I want to take the