| class MyGem | |
| class << self | |
| attr_accessor :color | |
| end | |
| def self.configure(&block) | |
| instance_eval(&block) | |
| end | |
| end |
It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media
This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.
| class MyGem | |
| class << self | |
| attr_accessor :color | |
| end | |
| def self.configure(&block) | |
| instance_eval(&block) | |
| end | |
| end |
| namespace :db do | |
| require "sequel" | |
| Sequel.extension :migration | |
| DB = Sequel.connect(ENV['DATABASE_URL']) | |
| desc "Prints current schema version" | |
| task :version do | |
| version = if DB.tables.include?(:schema_info) | |
| DB[:schema_info].first[:version] | |
| end || 0 |
| page.execute_script(%Q{$("#scrollElement").prop("scrollTop", 1000000).trigger('scroll')}) |
| git branch -m old_branch new_branch # Rename branch locally | |
| git push origin :old_branch # Delete the old branch | |
| git push --set-upstream origin new_branch # Push the new branch, set local branch to track the new remote |
| def social_meta_tags | |
| title = "#{(content_for?(:title) ? (strip_tags(content_for(:title)).html_safe + ' / ') : '')}#{t('project_title')}" | |
| description = content_for?(:description) ? content_for(:description) : '' | |
| image = if @doc.present? | |
| image_url(@doc.cover_photo.cover.url) | |
| elsif @main.present? | |
| image_url(@main.cover_photo.cover.url) | |
| else | |
| '' | |
| end |
| class Dashboard::Payments::CardsController < ::Dashboard::Payments::BaseController | |
| self.responder = Core::CustomServiceResponder | |
| respond_to :html | |
| before_action :customer_required | |
| def destroy | |
| service = Payments::Stripe::DeleteCreditCard.new(current_user) | |
| status_object = service.call(params[:identifier]) |
By default, your linux box would register your Huawei E8372 as a Mass Storage device and not (somehow) as a modem. First, make sure you have the exace same device we're talking about. This can be confirmed by looking at two values using the following command (while the dongle is plugged in): As an elevated user:
# lsusb | grep Huawei
| http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query | |
| http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails | |
| #payload: [{"kind"=>"person"}] | |
| Segment.where("payload @> ?", [{kind: "person"}].to_json) | |
| #data: {"interest"=>["music", "movies", "programming"]} | |
| Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json) | |
| Segment.where("data #>> '{interest, 1}' = 'movies' ") | |
| Segment.where("jsonb_array_length(data->'interest') > 1") |