ruby-on-rails-3.2

问题 I'm new to Ruby on Rails, but I have followed some tutorials and know my way around a little bit. I have generated some scaffolding and inserted data into a MySql database. When navigating to index.html.erb I receive the error in the title The controller is executing index def index @beers = Beer.all respond_to do |format| format.html # index.html.erb format.json { render :json => @beers } end end And has this as a structure Beer: id, brewer_id, name, price, score, color, brew_type, create_at

问题 My route is defined like this match '/user/:id' => 'user#show', :as => :user If for some reason a nil ID is passed I want the route helper to return only '#' and if ID is not nil i want it to return normal path like '/user/123'. or is there any better way to do it. this route helper has been used in lot of places in my code so I dont want to change that. Instead I am looking for one place which will effect all instances of user_path. Thanks 回答1: module CustomUrlHelper def user_path(user,

问题 My route is defined like this match '/user/:id' => 'user#show', :as => :user If for some reason a nil ID is passed I want the route helper to return only '#' and if ID is not nil i want it to return normal path like '/user/123'. or is there any better way to do it. this route helper has been used in lot of places in my code so I dont want to change that. Instead I am looking for one place which will effect all instances of user_path. Thanks 回答1: module CustomUrlHelper def user_path(user,

问题 My route is defined like this match '/user/:id' => 'user#show', :as => :user If for some reason a nil ID is passed I want the route helper to return only '#' and if ID is not nil i want it to return normal path like '/user/123'. or is there any better way to do it. this route helper has been used in lot of places in my code so I dont want to change that. Instead I am looking for one place which will effect all instances of user_path. Thanks 回答1: module CustomUrlHelper def user_path(user,

问题 I'm working on logging in a site via existing facebook account. So I registered a facebook application and stored api and secret in development.rb and production.rb files. Then I used omniauth-facebook gem + devise gem to implement this. It works perfect. By the way, an user can login either by internal authentication (by devise) or by usig facebook account. However there is a weird issue. It works perfect only if I login into facebook account in that I registered an application. So I

问题 I integrated omniauth-facebook using https://github.com/plataformatec/devise/wiki/OmniAuth%3a-Overview. But I am getting error of : Could not authenticate you from Facebook because "Invalid credentials". And in logs, getting this: Authentication failure! invalid_credentials: OAuth2::Error, : {"error":{"message":"This authorization code has been used.","type":"OAuthException","code":100}} I have devise installed. When i click on facebook sign in link, it comes back to devise sign "www.mealnut

问题 When I run code below it raise error: implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly. (RuntimeError). I am not sure what is the problem. class Result def total(*scores) percentage_calculation(*scores) end private def percentage_calculation(*scores) puts "Calculation for #{scores.inspect}" scores.inject {|sum, n| sum + n } * (100.0/80.0) end end def mem_result(obj, method) anon = class << obj; self; end anon.class

问题 When I run code below it raise error: implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly. (RuntimeError). I am not sure what is the problem. class Result def total(*scores) percentage_calculation(*scores) end private def percentage_calculation(*scores) puts "Calculation for #{scores.inspect}" scores.inject {|sum, n| sum + n } * (100.0/80.0) end end def mem_result(obj, method) anon = class << obj; self; end anon.class

问题 I doing a modal like this: Link that shows the modal: <%= link_to "versão resumida", resumed_rep_life_animal_path(animal, :partial => true), 'data-toggle' => 'modal', 'data-target' => '#myModal', 'data-no-turbolink' => true %> Modal html itself: <div class="modal hide fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <div class="modal-body"></div> <div class="modal-footer"> <button class="btn btn-primary" data-dismiss="modal" aria-hidden="true"

问题 I doing a modal like this: Link that shows the modal: <%= link_to "versão resumida", resumed_rep_life_animal_path(animal, :partial => true), 'data-toggle' => 'modal', 'data-target' => '#myModal', 'data-no-turbolink' => true %> Modal html itself: <div class="modal hide fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <div class="modal-body"></div> <div class="modal-footer"> <button class="btn btn-primary" data-dismiss="modal" aria-hidden="true"