ruby-on-rails-3

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . I'm going through DHH's Agile Web Development with Rails for Rails 3.1. In chapter 14 they create a Users sign-in model/view/controller using the has

问题 I have a working Google Annotated Timeline (see docs at http://code.google.com/apis/chart/interactive/docs/gallery/annotatedtimeline.html). I would like to explicitly set a start_date and end_date, I presume by using zoomStartTime and zoomEndTime . But, I cannot get it to work and I think it's either because my syntax is wrong or because I'm using the wrong format for dates. My last line of the function: chart.draw(data, {'displayAnnotations': true}, {'zoomStartTime': new Date(2011, 6, 26)},

问题 I'm really missing something here. I have read many things about devise redirects (seems like it is hard to implement for most people ...) but in my case I really don't get it. Sometimes I read that the methods after_<action>_path_for(resource) should be in the ApplicationController , sometimes it is mentionned to be in a specific controller, overriding the devise one. I'd rather have them in my ApplicationController since it bothers me to create more Controllers just for a redirect, but if

问题 This is my first rails app, one I'm creating for the sole purpose of learning rails. I created an app where I have Users and Products (and sessions, but this is not relevant here). After doing a rake db:mograte creating a few items and testing, I then wanted to add a relationship, where products belongs_to :users and a users has_many :products. But of course, since I have already created the tables, there isn't any column there to save this information. How do I make a migration on the

问题 A Brief Background I'm making a conventional forum to learn/practice Rails. User Model has_many :topics has_many :posts Topic Model has_many :posts belongs_to :user Post Model belongs_to :user belongs_to :topic However, when a User is creating a new Topic, I also want them to simultaneously create the first Post within that topic (just like forums work). Additionally, when the Topic creator edits the Topic, he also edits the first Post. So, I added accepts_nested_attributes_for :posts to the

问题 My accepts_nested_attributes_for only saves the parent and not the child (nested) attributes. This is many_to_many relationship between parent and child. Problem: nothing happens and nothing is saved. But on the page, I get this message: utf8: "\xE2\x9C\x93" authenticity_token: 9Pjxt7e5RRgWVGafRyMoDqBSqmtj/R2zBSiVxGGxFOI= parent: !map:ActiveSupport::HashWithIndifferentAccess name: "Test" gender: Male children_attributes: !map:ActiveSupport::HashWithIndifferentAccess "0": !map:ActiveSupport:

问题 I’d like to customize : 1. The order of the deals on the homepage 2. Emails depending on the deals a user has seen. Thanks to people on SO, it seems that the best would be to have 3 models and tables "standard_user", "deals" and "deals_participation" in order to have the many-to-many relationships the app need , a link table with to as follows: class DealParticipation < ActiveRecord:Base #This means the deal_participations table has a standard_user_id key belongs_to :standard_user #This means

问题 how would I validate that one field of my Model is "smaller" compared to another? class Event < ActiveRecord::Base validates :start, :presence => true validates :stop, :presence => true end In addition - how could I make sure that the "difference" between the two values doesn't exceed a maximum range? Cheers 回答1: I have a validation that's similar to this to make sure school years begin before they end and are not longer than a year. validate :beginning_before_ending, :not_longer_than_year

问题 I am trying to use Filterrific gem to filter data. but seems like every time I type in the text field, it just refreshes page and filter. I don't want it to refresh the page and it should be instant. Model: filterrific( default_filter_params: {}, available_filters: [ :dictionary_word_filter ] ) scope :dictionary_word_filter, lambda { |dictionary_word| where("dictionary_word LIKE :search", search: "%#{dictionary_word}%") } Controller: def index dictionary_types = DimDictionary::DISPLAY_TYPE

问题 I have a method (find_by_sql) that outputs a ruby object inside an array like this: [#<deal id: 66480, opportunity_id: 4, admin_user_id: 1, created_at: "2015-09-20 18:37:29", updated_at: "2015-09-20 18:37:29", deal_available: true>] How can I update the object's 'deal_available' attribute inside my database in raw postgresql ? I tried different ways to write it but I stumble on the fact that it's very specific: it's an array, and inside there is a ruby object and I must manage to tell