ruby-on-rails-3.2

问题 I have 2 models as describes below. class EmpGroup < ActiveRecord::Base belongs_to :user has_many :emp_group_members, dependent: :destroy end and class EmpGroupMember < ActiveRecord::Base belongs_to :emp_group belongs_to :user end now the problem is whenever I tried to destroy a group then I received a error as below. PG::ForeignKeyViolation: ERROR: update or delete on table "emp_groups" violates foreign key constraint "fk_rails_bd68440021" on table "emp_group_members" DETAIL: Key (id)=(1) is

问题 I am using tinyMCE4 editor inside a Boostrap modal dialog. when I clicked on link icon it opens a new modal dialog box, It displayed fine but the input areas are not editable. <div id="editing" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <form> <label> <span>Description</span> <div id="description"></div> </label> <form> </div> <script> tinymce.init({ selector: 'div#description', inline: false, theme : "modern", schema: "html5", add

问题 I was reading a book and in a chapter about Controllers when it talks about rendering stuff, for JSON it has an example like this but doesn't go in to details so I couldn't figure out the bigger picture that this example fits in: render :json => @projects, :include => tasks And also some example with JSONP using it with callback functions: render :json => @record, :callback => 'updateRecordDisplay' Can someone explain these? 回答1: You'll normally be returning JSON either because: A) You are

问题 When I am starting rails server using rails s command it is showing A server is already running. Check C:/Sites/folder/Pids/Server.pids When I open the file it is outputting a 4 digit number only so how could I resolve this issue ? FYI No other instance of Rails cmd is running this time. Checked Task manager but only cmd.exe is showing no else process is running. (using Windows). 回答1: Remove the file: C:/Sites/folder/Pids/Server.pids Explanation In UNIX land at least we usually track the

问题 I'm working on an application that needs to use session id information. My session is stored in cookies. The problem I have is that my session is not immediately available to the controller when a user comes to the site for the first time. I think I may be missing something about how sessions are initialized in Rails. But I'm positve about the fact that the session is not loaded because this is the output of session.inspect : #<Rack::Session::Abstract::SessionHash:0x15cb970 not yet loaded>

问题 I'm working on an application that needs to use session id information. My session is stored in cookies. The problem I have is that my session is not immediately available to the controller when a user comes to the site for the first time. I think I may be missing something about how sessions are initialized in Rails. But I'm positve about the fact that the session is not loaded because this is the output of session.inspect : #<Rack::Session::Abstract::SessionHash:0x15cb970 not yet loaded>

问题 To put simply enough, I'd just like to know if there's a way to set defaults for the sorting functionality using the Ransack gem? ie. Currently, I have the following when the page loads: But instead, I'd like to have the following defaults when the page loads: Is it possible to do this via proper configuration of the Ransack Gem? Thanks in advance as always! Best Regards! 回答1: This works for me: @search = Change.search(params[:q]) @search.sorts = 'updated_at desc' if @search.sorts.empty? Note

问题 I have a form (using simple_form) which I want to implement support for translated error messages. All my translations appear with the exception of the error message. My Customer model is: class Customer < ActiveRecord::Base attr_accessible :name, :phone, :email, :contact_method validates_presence_of :phone, :email, :contact_method, :message => I18n.t(:required) end My fr.yml file fr: name: 'Nom' phone: 'Téléphone' email: 'Courriel' contact_method: 'Méthode de contact' required: 'Requis' My

问题 My .js files are compressed and variables mangled, but function names are not mangled (running latest Rails 3.2.8 and latest uglify 1.3.0 gem) on Heroku. According to https://github.com/lautis/uglifier#usage the "mangle" option defaults to true. Below is my config. From production.rb: config.assets.compress = true config.assets.js_compressor = :uglifier I've also tried config.assets.compress = true config.assets.js_compressor = Uglifier.new(:mangle => true, :toplevel => true, :copyright =>

问题 I'm trying to get some RJS code written with prototype and Rails 2.3.11 to work in Rails 3.2.1 I have the prototype-rails gem, so render :update do |page| works, I'm using a form with :remote => true that sends an ajax request to the controller, and the javascript looks like it's being generated ok. However, the content-type in the header of the response is text/html; charset=utf-8 , which should be text/javascript . In the controller I'm calling it like this: render :update do |page| if