has-many

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ActiveRecord and use of has_one & has_many

Consider this simple model, where a Project has one ProjectType and, naturally many Projects can be of that type.[详细]

2023-04-01 13:14 分类：问答
Ruby on Rails: has_many referential --which model objects does it own?

I am new to Rails and finished Michael Hartl\'s \"Ruby on Rails 3 Tutorial\". Although the book teaches me a lot, I find this puzzle I don\'t understand.[详细]

2023-03-31 12:25 分类：问答
ActiveAdmin with has_many problem; undefined method 'new_record?'

I\'m trying to customise a ActiveAdmin form for a Recipe model that has a has_many relationship with Step.[详细]

2023-03-30 20:12 分类：问答
NHibernate: JoinedSubclass, HasMany

I use FluentNHibernate (Automapping) for mapping, NHibernate 3.2 for data access and SchemaExport to generate my database.[详细]

2023-03-30 06:22 分类：问答
Adding categories to a Ruby on Rails application

I\'ve had some issues with this before when creating applications and I think I\'m starting to run into it again, hence I\'m asking this on StackOverflow to save me a lot of time.[详细]

2023-03-28 07:20 分类：问答
Rails has_many assocation with non-class?

I would like to build a model where a class of ServiceRegions has a many-to-many relationship with zip codes.That is, ServiceRegions might cover multiple zip codes, and they might overlap, so the same[详细]

2023-03-27 05:45 分类：问答
Alternative method for proxy_owner in ActiveRecord

ActiveRecord proxy_owner is now deprecated and the explanation here is very vague on how to change it, so I\'m not sure how to use it my case:[详细]

2023-03-27 00:50 分类：问答
How do you make a has_many association unique?

Here\'s an example: Class Store < ActiveRecord::Base has_many :employees end Now when I create an employee like so:[详细]

2023-03-26 13:17 分类：问答
Has_and_belongs_to_many in Rails 3

I\'ve tried to look through stackoverflow to remedy my situation but unfortunately I\'ve just made myself thoroughly confused.[详细]

2023-03-25 04:52 分类：问答
How to get total price from estimate to show up in index.ctp using CakePHP

I have Estimates hasMany EstimateDetails hasMany Items.What I\'m trying to do is get a total on my estimates Index view.[详细]

2023-03-22 14:43 分类：问答