workflow:
$ rails g model NameOfModel
invoke active_record
create db/migrate/YYYYMMDDHHMMSS_create_name_of_models.rb
#!/bin/bash | |
# --------------------------------------------------------- | |
# Customizable Settings | |
# --------------------------------------------------------- | |
MOUNT_POINT="${CASE_SAFE_MOUNT_POINT:-${HOME}/casesafe}" | |
VOLUME_PATH="${CASE_SAFE_VOLUME_PATH:-${HOME}/.casesafe.dmg.sparseimage}" | |
VOLUME_NAME="${CASE_SAFE_VOLUME_NAME:-casesafe}" | |
VOLUME_SIZE="${CASE_SAFE_VOLUME_SIZE:-60g}" |
# Call scopes directly from your URL params: | |
# | |
# @products = Product.filter(params.slice(:status, :location, :starts_with)) | |
module Filterable | |
extend ActiveSupport::Concern | |
module ClassMethods | |
# Call the class methods with names based on the keys in <tt>filtering_params</tt> | |
# with their associated values. For example, "{ status: 'delayed' }" would call |
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.