associations

问题 Hey I made a scaffold called pictures, but now I need to it to have many tags. I want it to be so that you can do something like click add tag then fill in a tag, then click add tag ..., this would be in pictures/new and edit, and maybe show. I don't have a clue how to do this and I am not that great in rails, so be very clear if you can. (maybe there is something in rails like a button that if you click it you execute a function, even then I'm not sure how to go about this) I am using rails

问题 Just started playing with Ruby (no IT background) and until now went it quite well. But since two days I'm stuck and don't understand what's going wrong... so many thanks already for helping me out with this problem!! The situation is as described below: I created a currencymaster table with the following columns: currmasdesc:string , currmasiso:string . I created a currencyrate table with the following columns: currratemasteridd:integer , currratemasteridc:integer , currraterate:decimal ,

问题 I created a user profile where users can add their information. So on URL section I want them to put their other links like Facebook, www.facebook.com/user etc. But when I click Save nothing updates? Here is the Model for User: Models/User.php <?php class User extends AppModel { public $name = 'User'; public $hasMany = array ( 'UserWeb'=>array( 'className'=>'UserWeb', 'foreignKey'=>'user_id' ) ); } ?> The model for UserWeb: Models/UserWeb.php <?php class UserWeb extends AppModel { public

问题 I am using devise. It gives the current userid as current_user.id There are many users. There is a controller name as empsals_controller.rb class EmpsalsController < ApplicationController def index @empsals = Empsal.all end def show @empsal = Empsal.find(params[:id]) end def new @empsal = Empsal.new end def edit @empsal = Empsal.find(params[:id]) end def create @empsal = Empsal.new(params[:empsal]) respond_to do |format| if @empsal.save format.html { redirect_to @empsal, notice: 'Empsal was

问题 We are building a realtime webapp on sails 0.10.5. We have a lot of models linked through associations. For example we have a User model and a Post model, where a post always has one user. The populate makes sure that when fetching a user, we also get the posts. We tell the (websocket) client about updates using the subscribe and watch model methods in our sails controllers. However whenever a websocket client is watching both the User model ( watch and subscribe d to all users) and the Post

问题 I have built a Ruby on Rails application (Rails 2.3.9) that allows users to track workouts. After a workout is created other users can comment on that workout. I am now working on the Dashboard index view to display recent activity. In this particular section I am trying to display comments from all on workouts that current_user has commented on. I am successfully pulling those comments, ordering them, and limiting the output through the below code. I am now trying to exclude comments from

问题 Newbie question here. According to https://github.com/balderdashy/waterline#indexing you cannot use a 'string' datatype as an index in Waterline due to issues with case insensitivity: There is currently an issue with adding indexes to string fields. Because Waterline performs its queries in a case insensitive manner, we are unable to use the index on a string attribute. There are some workarounds being discussed but nothing is implemented so far. This will be updated in the near future to

问题 Two models Organization and User have a 1:many relationship, where an organization has multiple users (members; a user can also not be associated to any organization): class Organization < ActiveRecord::Base has_many :users, dependent: :destroy accepts_nested_attributes_for :users, :reject_if => :all_blank, :allow_destroy => true validates_associated :users end class User < ActiveRecord::Base belongs_to :organization, inverse_of: :users end Everything worked, all sorts of tests pass. Now I

问题 Could you please tell me if my diagram is correct? I especially care about relations between PaymentService and Customer , Payment , Customer I guess that: class Customer { private List<Payment> payments; //.. public boolean pay() { return PaymentService.pay(this.payments); // calling the static method of the class PaymentService } } interface Payment { // knows nothing about Customer } class PaymentService { public static boolean pay (List<ayment> payments) { // the magic here is return

问题 In the following example, I'd expect Product.searchAll to match both additives and products, but it seems to ignore eq('name', taste) . class Additive { String flavor static belongsTo = [product:Product] } class Product { String name static hasMany = [additives:Additive] static constraints = { name nullable:true } static namedQueries = { searchAll { taste -> or { eq('name', taste) additives { eq('flavor', taste) } } } searchAdditives { taste -> additives { eq('flavor', taste) } }