I have the following association: Site - hasMany - Sitekey Sitekey - belongsTo - Site sites.id is primary key
I am going to develop an app for Market Basket Analysis (using apriori algorithm) and I found a dataset which has more than 90,000 Transaction records .
I am using Ruby on Rails 3.0.7 and I would like to save associated model class instances (I use an has_many :through => ... association) on the creation time of the parent model. That is, I have th
Playing around with Fluent NHibernate\'s Getting Started project. I tried to customize the example a bit, for a few reasons, among them elimination of circular reference for json serialization.
I am using Ruby on Rails 3.0.7 and I am trying to save an \"has_many :through => checkboxes\" class object (I have read the Quick Tip: has_many :through => checkboxes blog post) but I have some tro
Given a Dinner model that has many Vegetable models, I would prefer that dinner.vegetables << carrot
I have the following model class Vote include Mongoid::Document include Mongoid::Timestamps field :value, :type => Symbol # can be :aye, :nay, :abstain, :present
Is there a difference between the following two snippets for this given class? class MyObjectClass < ActiveRecord::Base
I have a many-to-many relation setup for a data model which deals with a problem domain of Members and Addresses.Basically a \'member\' can have multiple \'addresses\', think of like when you have a w
I have a need to add metadata about a HABTM relationship. I wanted to use a has_many :through relationship to accomplish this, but it is not necessary. Here is the problem simplified:
加载中,请稍侯......