has-many

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FluentNHibernate - Map a collection of sibling objects where one sibling holds a collection of the other

I have a collection of objects like this public class ApplicationConfiguration { public virtual long ApplicationConfigurationId { get; set; }[详细]

2023-03-21 09:08 分类：问答
Rails 2.3: Product has_many Variants - how to do find on Product with conditions on Variant?

This looks like not so rare problem, but yet I couldn\'t find a good solution. General info: Product that has_many Variants[详细]

2023-03-20 23:21 分类：问答
In Rails how do I build a has_many association that has a scope

I have something like the following: class Project < ActiveRecord::Base has_many :project_people has_many :people, :through => :project_people[详细]

2023-03-20 19:36 分类：问答
What is the proper way to create an object with a belongs_to association?

I\'m pretty new to rails, and I 开发者_高级运维have some trouble getting the philosophy and finding the \"proper\" way to create an object as a dependency of an other one.[详细]

2023-03-20 15:40 分类：问答
Rails: How to use a belongs_to association for referencing in addition to a has_many association?

Following set-up: A user can have many addresses, but at least one of them is the main address. A foreign key in the user table should be used as a pointer to the main address record.[详细]

2023-03-20 03:30 分类：问答
how can i specify dynamic conditions in has_many associations

class Message has_many:threads,:class_nam开发者_如何学JAVAe=>\"Message\", :conditions => \"`#{Message.table_name}`.conversation_id = #{self.send(:conversation_id)}\"[详细]

2023-03-19 08:09 分类：问答
mongoid has_many relations

this is index.html.erb <p> <%= number_to_currency(product.price) %> <%= button_to \'Add to Cart\', cart_items_path(:product_id => product) %>[详细]

2023-03-17 17:39 分类：问答
How do I use Rails to find one has_many but not the other?

Message has_many user_messages.It has two. 1 UserMessage will have the sender as user_id The other UserMessage will have the receiver as user_id[详细]

2023-03-15 19:12 分类：问答
What are the default values for Rails 3 for :dependent on has_many and belongs_to

In rails 3, i know that i can force deletion of dependent objects on b开发者_开发百科elongs_to and has_many relations using the :dependent => :delete option. However i was wondering,[详细]

2023-03-15 17:34 分类：问答
RoR "Has many" link > How to get title via foreign key?

I have a basic question of relationship in RoR : In a view, I try to display the t开发者_C百科itle of a group, which is in the table \"groups\", and only the key \"group_id\" is stored in the table/o[详细]

2023-03-14 09:38 分类：问答