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  • inheriting scope from a has_many relationship

    - by hb922
    I am using ruby on rails 3.1 and have 2 models, an event and a group. Each event has_many groups, but has to have at least one "master" group, where the column :is_master = true Class Group < ActiveRecord::Base has_many :users belongs_to :event scope :master, where (:is_master => true) end Class Event< ActiveRecord::Base has_many :groups def master_group groups.master end end I want to be able to default all properties of the master group to the event, so for example, event.users.count should be the same as event.master_group.users.count. Is there any way to do something like this? Can I do a has_many :through = master_group? Am I approaching this the wrong way? Thanks!

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  • Conditional value for ActiveRecord create method only

    - by Steve Wright
    I have a form where I have an administrator creating new users. The form uses the User model I created (login, password, first_name, etc...). For the last field on the form, I want to have a checkbox that doesn't need to be stored as part of the User record, but it is needed for the controller. This will control whether or not the newly created user will receive a welcome email or not. def create @user = User.new(params[:user]) if @user.save if @user.send_welcome_email UserMailer.welcome_email(@user).deliver end redirect_to(admin_users_url, :notice => "User #{@user.name} was successfully created.") else render :action => "new" end end In my view (haml) I am trying to access it like this: %p Send Welcome Email? = f.check_box :send_welcome_email I tried to make this an attr_accessible: :send_welcome_email but the controller does not recognize it. I get an undefined method 'send_welcome_email' for #&lt;User:0x00000100d080a8&gt; I would like it to look like this: What is the best way to get this working:

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  • Include a Class in another model / class / lib

    - by jaycode
    I need to use function "image_path" in my lib class. I tried this (and couple of other variations): class CustomHelpers::Base include ActionView::Helpers::AssetTagHelper def self.image_url(source) abs_path = image_path(source) unless abs_path =~ /^http/ abs_path = "#{request.protocol}#{request.host_with_port}#{abs_path}" end abs_path end end But it didn't work. Am I doing it right? Another question is, how do I find the right class to include? For example if I look at this module: http://api.rubyonrails.org/classes/ActionView/Helpers/AssetTagHelper.html is there a rule of thumb how to include that module in a model / library / class / anything else ?

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  • helper function not found in view

    - by cbrulak
    I'm following the instructions at: http://agilewebdevelopment.com/plugins/acts_as_taggable_on_steroids to add the tag cloud to my view: in the controller: class PostController < ApplicationController def tag_cloud @tags = Post.tag_counts end end I also added the tag_cloud method as a helper method in the controller and in the view: <% tag_cloud @tags, %w(css1 css2 css3 css4) do |tag, css_class| %> (line 1) <%= link_to tag.name, { :action => :tag, :id => tag.name }, :class => css_class %> (line2) <% end %> (line 3) However: 1) if I don't add the helper_method :tag_cloud in the controller I get a undefined method error for tag_cloud 2) if I do add the helper method I get: wrong number of arguments (2 for 0) on the same line 1 of my sample code above. Suggestions?

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  • Swap image with jquery and show zoom image

    - by Neil Bradley
    Hi there, On my site I have 4 thumbnail product images that when clicked on swap the main image. This part is working okay. However, on the main image I'm also trying to use the jQZoom script. The zoom script works for the most part, except that the zoomed image always displays the zoom of the first image, rather than the one selected. This can be seen in action here; http://www.wearecapital.com/productdetails-new.asp?id=6626 I was wondering if someone might be able to suggest a solution? My code for the page is here; <% if session("qstring") = "" then session("qstring") = "&amp;rf=latest" maxProducts = 6 prodID = request("id") if prodID = "" or not isnumeric(prodid) then response.Redirect("listproducts.asp?err=1" & session("qstring")) else prodId = cint(prodId) end if SQL = "Select * from products,subcategories,labels where subcat_id = prod_subcategory and label_id = prod_label and prod_id = " & prodID set conn = server.CreateObject("ADODB.connection") conn.Open(Application("DATABASE")) set rs = conn.Execute(SQL) if rs.eof then ' product is not valid name = "Error - product id " & prodID & " is not available" else image1 = rs.fields("prod_image1") image1Desc = rs.fields("prod_image1Desc") icon = rs.fields("prod_icon") subcat = rs.fields("prod_subcategory") image2 = rs.fields("prod_image2") image2Desc = rs.fields("prod_image2Desc") image3 = rs.fields("prod_image3") image3Desc = rs.fields("prod_image3Desc") image4 = rs.fields("prod_image4") image4Desc = rs.fields("prod_image4Desc") zoomimg = rs.Fields("prod_zoomimg") zoomimg2 = rs.Fields("prod_zoomimg2") zoomimg3 = rs.Fields("prod_zoomimg3") zoomimg4 = rs.Fields("prod_zoomimg4") thumb1 = rs.fields("prod_preview1").value thumb2 = rs.fields("prod_preview2").value thumb3 = rs.fields("prod_preview3").value thumb4 = rs.fields("prod_preview4").value end if set rs = nothing conn.Close set conn = nothing %> <!-- #include virtual="/includes/head-product.asp" --> <body id="detail"> <!-- #include virtual="/includes/header.asp" --> <script type="text/javascript" language="javascript"> function switchImg(imgName) { var ImgX = document.getElementById("mainimg"); ImgX.src="/images/products/" + imgName; } </script> <script type="text/javascript"> $(document).ready(function(){ var options = { zoomWidth: 466, zoomHeight: 260, xOffset: 34, yOffset: 0, title: false, position: "right" //and MORE OPTIONS }; $(".MYCLASS").jqzoom(options); }); </script> <!-- #include virtual="/includes/nav.asp" --> <div id="column-left"> <div id="main-image"> <% if oldie = false then %><a href="/images/products/<%=zoomimg%>" class="MYCLASS" title="MYTITLE"><img src="/images/products/<%=image1%>" title="IMAGE TITLE" name="mainimg" id="mainimg" style="width:425px; height:638px;" ></a><% end if %> </div> </div> <div id="column-right"> <div id="altviews"> <h3 class="altviews">Alternative Views</h3> <ul> <% if oldie = false then writeThumb thumb1,image1,zoomimg,image1desc writeThumb thumb2,image2,zoomimg2,image2desc writeThumb thumb3,image3,zoomimg3,image3desc writeThumb thumb4,image4,zoomimg4,image4desc end if %> </ul> </div> </div> <!-- #include virtual="/includes/footer-test.asp" --> <% sub writeThumb(thumbfile, imgfile, zoomfile, thumbdesc) response.Write "<li>" if thumbfile <> "65/default_preview.jpg" and thumbfile <> "" and not isnull(thumbfile) then if imgFile <> "" and not isnull(imgfile) then rimgfile = replace(imgfile,"/","//") else rimgfile = "" if thumbdesc <> "" and not isnull(thumbdesc) then rDescription = replace(thumbdesc,"""","&quot;") else rDescription = "" response.write "<img src=""/images/products/"& thumbfile &""" style=""cursor: pointer"" border=""0"" style=""width:65px; height:98px;"" title="""& rDescription &""" onclick=""switchImg('" & rimgfile & "')"" />" & vbcrlf else response.write "<img src=""/images/products/65/default_preview.jpg"" alt="""" />" & vbCrLF end if response.write "</li>" & vbCrLF end sub %>

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  • Tables in LaTeX

    - by rosalia
    When I try centering my table & getting a caption so that it reads something like "Table 1. This is the caption." the table appears at the top of the page no matter what I do. If I don't do the caption then I can get it in the part of the document that I want. How do I fix this problem? \begin{table} \caption{This is the caption.} \begin{center} \begin{tabular}{ | l | l | l | l |} \hline ... \hline \end{tabular} \end{center} \end{table}

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  • How do I set up my @product=Product.find(params[:id]) to have a product_url?

    - by montooner
    Trying to recreate { script/generate scaffold }, and I've gotten thru a number of Rails basics. I suspect that I need to configure default product url somewhere. But where do I do this? Setup: Have: def edit { @product=Product.find(params[:id]) } Have edit.html.erb, with an edit form posting to action = :create Have def create { ... }, with the code redirect_to(@product, ...) Getting error: undefined method `product_url' for #< ProductsController:0x56102b0 My def update: def update @product = Product.find(params[:id]) respond_to do |format| if @product.update_attributes(params[:product]) format.html { redirect_to(@product, :notice => 'Product was successfully updated.') } format.xml { head :ok } else format.html { render :action => "edit" } format.xml { render :xml => @product.errors, :status => :unprocessable_entity } end end end

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  • Can you use MongoDB map/reduce to migrate data?

    - by Brian Armstrong
    I have a large collection where I want to modify all the documents by populating a field. A simple example might be caching the comment count on each post: class Post field :comment_count, type: Integer has_many :comments end class Comment belongs_to :post end I can run it in serial with something like: Post.all.each do |p| p.udpate_attribute :comment_count, p.comments.count end But it's taking 24 hours to run (large collection). I was wondering if mongo's map/reduce could be used for this? But I haven't seen a great example yet. I imagine you would map off the comments collection and then store the reduced results in the posts collection. Am I on the right track?

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  • Custom Rails Validation (Doesn't seem to be working)

    - by Karl Entwistle
    Hey guys ive got the following Model for Accounts require 'net/http' require 'uri' require 'date' class Account < ActiveRecord::Base validates_presence_of :username, :password, :on => :update validate :valid_expiry_date, :on => :update def valid_expiry_date reply = Net::HTTP.get URI.parse("http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=getaccountdetails_v1&type=prem&login=" + username + "&password=" + password) account = Time.at(reply[80..90].to_i) if (Time.now + 2419200) <= account return true else return false errors.add_to_base("Sorry this account isnt valid") end end end I know the code works in a ruby.rb file and will return true or false, however I seem to be having rather a lot of difficultly trying to translate this code into an actual validation, any help would be much appreciated. Thanks :) Its also defiantly at least connecting to the website as my firewall asked me if the Terminal was aloud to access it. At the moment not only is it displaying no errors its actually letting anything through and saving it.

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  • C++ vector<T>::iterator operator +

    - by Tom
    Hi, Im holding an iterator that points to an element of a vector, and I would like to compare it to the next element of the vector. Here is what I have Class Point{ public: float x,y; } //Somewhere in my code I do this vector<Point> points = line.getPoints(); foo (points.begin(),points.end()); where foo is: void foo (Vector<Point>::iterator begin,Vector<Point>::iterator end) { std::Vector<Point>::iterator current = begin; for(;current!=end-1;++current) { std::Vector<Point>::iterator next = current + 1; //Compare between current and next. } } I thought that this would work, but current + 1 is not giving me the next element of the vector. I though operator+ was the way to go, but doesnt seem so. Is there a workaround on this? THanks

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  • What's the bug in the following code ?

    - by Johannes
    #include <iostream> #include <algorithm> #include <vector> #include <boost/array.hpp> #include <boost/bind.hpp> int main() { boost::array<int, 4> a = {45, 11, 67, 23}; std::vector<int> v(a.begin(), a.end()); std::vector<int> v2; std::transform(v.begin(), v.end(), v2.begin(), boost::bind(std::multiplies<int>(), _1, 2)); std::copy(v2.begin(), v2.end(), std::ostream_iterator<int>(std::cout, " ")); } When run, this gives a creepy segmentation fault. Please tell me where I'm going wrong.

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  • MessageBox.Show not raising HelpRequested event

    - by Trevortni
    I have a form that is showing a MessageBox using MessageBox.Show, and trying to receive events from the Help button on the MessageBox so I can execute my own code. The Microsoft documentation shows how to do this; however, using what is suggested does not work. Here's a shortened version of my code: Private Function MethodName() As Boolean AddHandler Me.HelpRequested, AddressOf Me.MsgBoxHelpRequested Select Case MessageBox.Show("Text", "Title", MessageButtons.YesNoCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2, 0, True) Case MsgBoxResult.Yes ' Do stuff Case MsgBoxResult.No ' Do stuff Case MsgBoxResult.Cancel RemoveHandler Me.HelpRequested, AddressOf Me.MsgBoxHelpRequested Return False End Select RemoveHandler Me.HelpRequested, AddressOf Me.MsgBoxHelpRequested End Function Private Sub MsgBoxHelpRequested(ByVal sender As Object, ByVal hlpevent As System.Windows.Forms.HelpEventArgs) ' Breakpoint that never gets hit ' More code End Sub I've been searching for a solution to this problem, but the best I've found is this question: http://stackoverflow.com/questions/2407880/how-to-detect-help-button-press-in-windows-forms-messagebox that refers me back to the same Microsoft code that doesn't seem to be working. Can anybody help me with this? Thank you.

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  • Declaring an integer Range with step != 1 in Ruby

    - by Dan Tao
    Hey guys, I'm completely new to Ruby, so be gentle. Say I want to iterate over the range of even numbers from 2 to 100; how would I do that? Obviously I could do: (2..100).each do |x| if x % 2 == 0 # my code end end But, obviously (again), that would be pretty stupid. I know I could do something like: i = 2 while i <= 100 # my code i += 2 end I believe I could also write my own custom class that provides its own each method (?). I am almost sure that would be overkill, though. I'm interested in two things: Is it possible to do this with some variation of the standard Range syntax (i.e., (x..y).each)? Either way, what would be the most idiomatic "Ruby way" of accomplishing this (using a Range or otherwise)? Like I said, I'm new to the language; so any guidance you can offer on how to do things in a more typical Ruby style would be much appreciated.

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  • why is link generated in YUI javascript failing to render in rails?

    - by pmneve
    Using YAHOO.widget.treeview to generate a table with three levels of data: module, submodule, and detail. If there is an image associated with a detail row the javascript generates a link: "<td><a href=\"/screenshot/show/" + rowData.id + "\">Screenshot</a></td>" that is appended to the html for the row. The url is generated correctly and the link appears. When clicked nothing happens except the word 'Done' appears in the browser status bar. Am calling the very same url from another page that does not use javascript and the screenshot page appears as expected. Here is the controller. class ScreenshotController < ApplicationController def show if @detail.screen_path.length 1 @imagePath = "#{RAILS_ROOT}" + "/private/#{Company.find(@detail.company_id).subdir}/" + "#{Project.find(@detail.project_id).subdir}/screenshot/" + "#{@detail.screen_path}" send_file ( @imagePath, :type = 'image/jpeg', :disposition = 'inline') end end end A sample url: http://localhost:3004/screenshot/show/20854 This code from show.html.erb belonging to the detail model works: <%= link_to 'View', :controller = 'screenshot', :id = @detail.id, :action = 'show' % Any ideas???

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  • Beginning with Datampper, Association question

    - by Ian
    I'm just diving into Datamapper (and Sinatra) and have a question about associations. Below are some models I have. This is what I want to implemented. I'm having an issue with Workoutitems and Workout. Workout will be managed separately, but Workoutitems has a single workout associated with each row. Workout - just a list of types of workouts (run, lift, situps, etc) Selected workout - this is the name of a set of workouts, along with notes by the user and trainer. It has a collection of N workoutitems Workoutitems - this takes a workout and a number of repetitions to it that go in the workout set. class Workout include DataMapper::Resource property :id, Serial #PK id property :name, String, :length=50,:required=true # workout name property :description, String, :length=255 #workout description end class Selectedworkout include DataMapper::Resource property :id, Serial property :name, String, :length=50, :required=true property :workout_time, String, :length=20 property :user_notes, String, :length=255 property :coach_notes, String, :length=255 has n, :workoutitems end class Workoutitem include DataMapper::Resource property :id, Serial property :reps, String, :length=50, :required=true belongs_to :selectedworkout end

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  • VB6 debugging- doesn't go to error handling code.

    - by Can Ho
    Hi, I'm maintaining a vb6 project(ActiveX DLL). When debugging, the app run into the following function: Public Function HasValue(ByVal vValue) As Boolean On Error GoTo Err If IsMissing(vValue) Then HasValue = False ElseIf IsNull(vValue) Or Len(vValue) = 0 Then HasValue = False ElseIf isEmpty(vValue) Then HasValue = False Else HasValue = True End If Exit Function Err: If IsArray(vValue) Or IsObject(vValue) Then HasValue = True Else HasValue = False End If End Function and it stops at the line ElseIf IsNull(vValue) Or Len(vValue) = 0 Then vValue is a custom object, contains some properties(obviously, not null). Although I didn't put any break point there, the app stopped there and alerted error dialog saying that "Run-time error '438': Object doesn't support this property or method". We had error handling code but the app didn't run to error handling code. It just stopped at the line causing the error and I had to stop the application. Do you have any idea about that? Thank you very much.

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  • Exposing console apps to the web with Ruby

    - by Aaron
    I'm looking to expose an interactive command line program via JSON or another RPC style service using Ruby. I've found a couple tricks to do this, but im missing something when redirecting the output and input. One method at least on linux is to redirect the stdin and stdout to a file then read and write to that file asynchronously with file reads and writes. Another method ive been trying after googling around was to use open4. Here is the code I wrote so far, but its getting stuck after reading a few lines from standard output. require "open4" include Open4 status = popen4("./srcds_run -console -game tf +map ctf_2fort -maxplayers 6") do |pid, stdin, stdout, stderr| puts "PID #{pid}" lines="" while (line=stdout.gets) lines+=line puts line end while (line=stderr.gets) lines+=line puts line end end Any help on this or some insight would be appreciated!

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  • How do I create another controller action to create an object in rails?

    - by Angela
    I have a model called Contact_Email. When an Email template is sent through ActionMailer to a specific Contact, as part of the Create action it sends it through upon .save. However, I want to create a "skip" action which also creates a Contact_Email, but does NOT send an ActionMailer and allows me to set the status differently. I want to create a separate action because I want to make this respond to a remote_for_tag so that I can just have an ajax button indicate it has been "skipped": Here's what I tried, but while it creates a Contact_Email, I end up getting an error when I want to go back and view all the Contacts again. def skip @contact_email = ContactEmail.new @contact_email.contact_id = params[:contact_id] @contact_email.email_id = params[:email_id] @contact_email.status = "skipped" if @contact_email.save flash[:notice] = "skipped email" redirect_to contact_emails_url end end

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  • What causes Apache Environment Variable set using mod_rewrite to have "redirect_" appended to name?

    - by trowel
    I am trying to set Apache environment variables (for use in PHP) with the [E=VAR:VAL] flag on RewriteRule rules in an .htaccess file. I have already discovered the variables are accessed in PHP as server variables $_SERVER rather than $_ENV (which makes a certain amount of sense). However, my problem is for some rules the [E=VAR:VAL] flag works as expected and I end up with a variable $_SERVER['VAR'] but for other rules I end with a variable $_SERVER['REDIRECT_VAR'] or $_SERVER['REDIRECT_REDIRECT_VAR'], etc A. What causes an Environment Variable set in Apache using the [E=VAR:VAL] flag to get renamed by having "REDIRECT_" appended to the front of the variable name? B. What can I do to make sure I end up with an Environment Variable with an unchanged name so I can access it in PHP as $SERVER['VAR'] without having to resort to checking for variations of the variable name having one of more instances of "REDIRECT" appended to the front of it?

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  • DataMapper save fails but with no errors

    - by Justin Bozonier
    When I try to modify and then save a model using DataMapper I get a SaveFailure exception but no errors. Specifically I see this message: "MonthlyBill#save returned false, MonthlyBill was not saved" This is the code doing the saving: post '/monthly_bills' do with_authenticated_user do |user| description = params[:description] expected_amount = params[:expected_amount] pay_period = params[:pay_period] monthly_bill = MonthlyBill.new(:description=>description, :expected_amount=>expected_amount, :pay_period=>pay_period) user.MonthlyBills << monthly_bill user.save end The User model: class User include DataMapper::Resource property :id, Serial property :email_address, String property :password, String has n, :MonthlyBills has 1, :CurrentPayPeriod end The MonthlyBill model: class MonthlyBill include DataMapper::Resource property :id, Serial property :description, String property :expected_amount,Decimal property :pay_period, Integer belongs_to :user end What is the issue and, more importantly, how can I get DataMapper to tell me more specifically what is wrong?

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  • Excel VBA: Alternate Row Color in Range

    - by Kurt
    I spent a VERY long time today looking up a method to alternate row colors within a specified range. There really isn't a lot out there and to be honest what I found just looked over-complicated. So, I decided to stop acting like a shameless 'script-kiddy' and put the below sample together: Sub AlternateRowColors() Dim lastRow as Long lastRow = Range("A1").End(xlDown).Row For Each Cell In Range("A1:A" & lastRow) ''change range accordingly If Cell.Row Mod 2 = 1 Then ''highlights row 2,4,6 etc|= 0 highlights 1,3,5 Cell.Interior.ColorIndex = 15 ''color to preference Else Cell.Interior.ColorIndex = xlNone ''color to preference End If Next Cell End Sub Now I know that works, but I was wondering if there's a simpler method? If so, please do tell because I'm very eager to learn simplification as I have a tendency to write verbose code at present. If not, then may this entry find it's way to page 1 of Google for it's search term(s), because it took me absolutely ages to find anything even remotely useful. Comments left for script-kiddies' benefit.

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  • Event is causing an error, but I can't catch the exception

    - by proudgeekdad
    A developer has created a custom control in ASP.NET using VB.NET. The custom control uses a repeater. In certain scenarios, the rpt_ItemDataBound event is encountering a data error. My goal is rather than having the user see the yellow screen of death, give the user a friendlier error explaining exactly what the data error is. I figured I would be able to use a Try/Catch block as shown below throw the exception, however, it appears that the event has nowhere to be thrown to and stops executing at the "End Try" line. Protected Sub rpt_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rpt1.ItemDataBound, rpt2.ItemDataBound Try ProcessBadData... Catch ex As Exception Throw ex End Try End Sub In VB.NET, I can find where the repeater's DataSource is being set, however, I can not find a DataBind event. Any ideas how I can capture the exception in this ASCX control so I can report it to the user?

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  • Interaction between for loops with clock function?!

    - by learningtolive
    Can someone explain me the exact interaction in context of delay between the two for loops with clock function. How does for1 interact with for2 on the cout statement(30 on 640000000)? start=clock(); cout<<endl<<start<<endl; for(delay=0; delay<30; delay++) for(i=0; i<640000000; i++); end=clock(); cout<<end<<endl; cout<<"Num of ticks for non reg-loop: "; cout<<end-start<<'\n';

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  • How to scroll whole visible page down to an anchor with a smooth effect (Scriptaculous or jQuery)?

    - by ChrisBenyamin
    Hey community, I want to create an navigation with anchors. By clicking on a navigation link, the whole visible page should scroll down to the clicked anchor. The most important is the following structure of the page. --------------- (Begin visible browser area) NAV1 nav2 nav3 content --------------- (Begin/end visible browser area) nav1 NAV2 nav3 content --------------- (Begin/end visible browser area) nav1 nav2 NAV3 content --------------- (end visible browser area) Finally all content is in a single document and the height of the current page (selected by the nav-item) has to be calculated (with a JS Library). I prefer PrototypeJS/Scriptaculous and jQuery. The scroll effect should be a smooth slide/ effect. Chris

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  • How do you write a recursive stored procedure

    - by Grayson Mitchell
    I simply want a stored procedure that calculates a unique id and inserts it. If it fails it just calls itself to regenerate said id. I have been looking for an example, but cant find one, and am not sure how I should get the sp to call itself, and set the appropriate output parameter. I would also appreciate someone pointing out how to test this sp also. ALTER PROCEDURE [dbo].[DataContainer_Insert] @SomeData varchar(max), @DataContainerId int out AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; BEGIN TRY SELECT @UserId = MAX(UserId) From DataContainer INSERT INTO DataContainer (UserId, SomeData) VALUES (@UserId, SomeData) SELECT @DataContainerId = scope_identity() END TRY BEGIN CATCH --try again exec DataContainer_Insert @DataContainerId, @SomeData END CATCH END

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