similar to: How to use variables inside rhtml??

Hi, I am new to ROR. PLease tell me what is syntax of creating hidden field in form inside RHTML file. I knonw the syntax for text box (<%= text_field ''product_item'',''product_id'', :value=>product.id%>) But I don''t know syntax for hidden field(like <input type=hidden> in HTML). Please tell me. Thanx in advance. Prash -- Posted via

Hi, I am entering value in textbox ("name") on form. Now name field in database is having ''unique'' constraint on it so that no 2 records with same name allowed in database. Now when I m trying to enter same name into database from my form I m getting following error. ================================ Mysql::Error: #23000Duplicate entry ''Prashant''

Hi, I am new to ROR. I have created a form with foru fields in ROR. Now its working fine for all CRUD operations. But I want to validate data on form for "validates_presence_of" validation. How to do this? I tried it by putting line "validates_presence_of :description" . But its not working. Its throws error like "undefined method `each'' for

Hi, I want to disable textbox in my page so that user can not modify its contents. How can we do that in ruby? Thanx, Prash -- Posted via http://www.ruby-forum.com/.

Hi, I am trying to use method `validates_presence_of'' for validating my input fields on form . I m using it in my action class as follows:- ======================= validates_presence_of(params[:product][:quantity]) ====================== But when I am running my application i m getting error like:- ========================= undefined method `validates_presence_of'' for

I searched the archives and did not find a solution, so I pose this question to those well-versed in the use of plotmath and expressions. I have a list of strings in an external CSV file which I wish to use sometimes as plot axis labels and sometimes as plot titles. These strings combine plaintext and a few mathematical expressions (Greek letters, subscripts). Moreover, I sometimes need to

Dear list, I have the following text to parse (originating from readLines as some lines have unequal size), st = c("START text1 1 text2 2.3", "whatever intermediate text", "START text1 23.4 text2 3.1415") from which I'd like to extract the lines starting with "START", and group the subsequent fields in a data.frame in this format: text1 text2

I am very sorry for such a simple question, but I am struggling with "split". I have the following data frame: x<-data.frame(A=c(NA,NA,NA,NA,"split",NA,NA,NA,NA,"split",NA,NA,NA,NA,"split",NA,NA,NA,NA),

R 2.15.1 OS X Colleagues, I encountered the following unexpected behavior today: The following command yielded the expected result: paste(c("TEXT1", "TEXT2"), collapse="|") Result: [1] "TEXT1|TEXT2" However, abbreviating "collapse" by even one character: paste(c("TEXT1", "TEXT2"), collaps="|") yielded the

Dear R-ers! I have a badly organized data base in Excel. Once I read it into R it looks like this (all variables become factors because of many spaces and other characters in Excel):

Hi, I have some values on my webpage displaying like 1.22333333333 2.33333344444 2.33377777777 etc. Here I want to display values upto 2 decimal places correct. i.e, 1.22333333333 should be dislayed as 1.22 2.33333344444 should be dislayed as 2.33 2.33777777777 should be dislayed as 2.34 & so on.... How to do this in ruby????? Is there any function??? Thanx in advance. Prash --

Hi, I want to calculate difference between Current date & previous date (stored in database). The difference should be in days. Hhow to do that?? PLs tell me. Thanx in advance. Prash -- Posted via http://www.ruby-forum.com/.

Hi, I have an object (@cnt). Now when I am calling "@cnt.inspect" on object it gives me output as follows:- ----output---- [#"3"}>] ----------- Now in aboove output the number between double quotes (3) which is of my interest & I want to display it. How to do that? Actually this is my method:- ==================================== class Tagging < ActiveRecord::Base

Hi, In my application I want to find out the occurance of substring "http:\\" in the main string "http:\\www.abc.com" Here how to find out whether substring "http:\\" is present in my String? & if substring "http:\\" is present then I want to delete it from main string. How to do this? PLs help me. Thanx in advance. Prash -- Posted via

HI, How to specify default action for particular actioncontroller? Currently when I m typing the URL as "http:\\localhost:3000\actioncontroller_name" , then I m getting the default actin page as list.rHtml. But instead I want my action page to be index.rHtml. How to do it? Thanx. Prash -- Posted via http://www.ruby-forum.com/.

Hi, I have downloaded "Ruby on Rails validator plugin for password fields". & they have specified that for using it we have to unzip it in plugins directory of your rails application. But I cant find the plugin directory in my Rails Application. Also there is plugin directory in Rails server installation directory:-"C:\local\ruby\freeride\plugins\". & so I have

I have 2 vectors, x and y and have done an xy plot. I want to plot the label (name?) of the vector on the plot rather than the value. text(x,y, labels = x) gives me the value of x. text(x,y, labels = labels(x)) gives me something like c("text1","text2"..) plotted for each point text(x,y, labels = names(x)) gives nothing print(x) gives me [,1] text1

I''ve got something that I''m not sure is actually doable. I have a very complex model relationship with a lot of parent/child/grandchild/ greatgrandchild etc stuff going on. Is there a way to do a route like this? tld.com/ projects/:project_name/:sequence_acronym/:shot_number/:department/:eleme nt_name/:version/ where: project is the parent of sequence sequence is the

Hi, I''m upgrading my app from 2.2.2 to 2.3.2 and am having a problem with ActiveResource. class FooResource < ActiveResource::Base self.site = "whatever" self.element_name = "foo" end FooResource.create(:bar => ''baz'') raises: Net::HTTPHeaderSyntaxError: wrong Content-Length format from

Hi Perhaps omeone might answer this tricky problem. I can do this other ways, but i really want to understand how to solve it using ed. I have one solution using g/re/s/re//txt/ , but I want to understand how or if i can solve it using the ed (.)a command. A script i have parse several files and append text after a specific text is matched. If one file do not have this text, i get a no match