railscasts

I was following the Railscast #196 revised and everything went basically fine, but I am not able to add new fields to the nested form. The "remove fields" function works nicely, but after click on "link_to_add_fields", the browser jumps to the top of the page, and no new field appears. There are already a ton of questions to this railscast, like here or here , and I tried to read all of them, but most of them are referring to the original casts from 2010. I am stuck for hours now, and I can't figure out, where my problem is. Sorry, if its a rookie mistake, I am quite new to rails. Any help

I followed the http://railscasts.com/episodes/362-exporting-csv-and-excel and set up an Excel Download in my Rails application. My controller code looks like this: def show @project = Project.find(params[:id]) @project.tasks.order(:name) respond_to do |format| format.html format.json { render json: @project } format.xls end end and in my view I create the link to download the excel file like this: .dl_xls= link_to "Download xls", url_for(:format => 'xls') Now the generated excel file is always named like the id of the Project record, e.g. 80.xls Is there any way to change this behaviour and

I'm new to Rails and was following Ryan Bate's tutorial on how to make a simple authentication system ( http://railscasts.com/episodes/250-authentication-from-scratch?autoplay=true ) and I was just going through it but got this error: ` NoMethodError in UsersController#new undefined method `key?' for nil:NilClass Rails.root: C:/Sites/authentication` I don't really know what this means since I'm just a beginner, but these are my files: users controller: class UsersController < ApplicationController def new @user = User.new end def create @user = User.new(params[:user]) if @user.save redirect_to

I'm using the faye gem menitioned in the railscast allowing apps to push messages. Problem is it pushes messages to all chat clients that are open. I need them to be private. It's possible to get private messaging with faye but it's url based. For example all messages will be sent to site.com/foo . But, in my model the chat doesn't have a specific url. Because chat is just a collection of messages sent to you by that user. So if you're logged in as adam site.com/messages/eve would allow you to talk to eve but for eve it's the reverse. site.com/messages/adam . So URL specific private chat is

I've been watching and reproducing these railscasts on my app: 196-nested-model-form-part-1 and 197-nested-model-form-part-2 . I do not yet have a pro account so i can't watch the revised episode. I'm developing under rails4 (edge) and link_to_function has been deprecated in favor of unobstrusive JS (which is great). I'll keep the example of the above railscasts (i.e. survey/question). What i'd like to do is to use the question's partial through unobstrusive javascript and i just don't know how and where i should do this. I was thinking of two ways to do so : First way would be to add in my

When using the example app from Ryan Bates' Railscasts Episode #362 about exporting to Excel ( https://github.com/railscasts/362-exporting-csv-and-excel ), I've noticed that Excel 2010 (which is on Windows) gives me a warning message when opening up the .xls file I've downloaded using the "Download as Excel" link. The warning reads: "The file you are trying to open ... is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?" I can open the file just fine when I

I've looked at ActiveRecord::DangerousAttributeError and other similar threads on SO, but they don't address the same issue. I'm following the omniauth tutorial: http://railscasts.com/episodes/235-omniauth-part-1?view=asciicast I'm able to authenticate via oauth with Twitter and return the user's data (auth). The problem is that I'm not able to create/save it in the database (sqlite3) because of this error message. Error: ActiveRecord::DangerousAttributeError in AuthenticationsController#create create is defined by ActiveRecord Rails.root: /beta/devise-omniauth1 Application Trace | Framework

Im trying to use the jquery tokeninput found here: http://loopj.com/jquery-tokeninput/ Following the guide from railcasts: http://railscasts.com/episodes/258-token-fields By default, it required a 'name' column on the table/json.. Any way to customize to change it to something else (in my case, 'account_number')? (in the reailcast, he says if you dont have a 'name' column, youll require extra customization) The magical lines are <%= f.text_field :author_tokens, "data-pre" => @book.authors.map(&:attributes).to_json %> and format.json { render :json => @authors.map(&:attributes) } These lines