https://github.com/snusnu/dm-accepts_nested_attributes

A DataMapper plugin that allows nested model assignment like activerecord.
https://github.com/snusnu/dm-accepts_nested_attributes

Last synced: 11 days ago
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A DataMapper plugin that allows nested model assignment like activerecord.

• Host: GitHub
• URL: https://github.com/snusnu/dm-accepts_nested_attributes
• Owner: snusnu
• License: mit
• Created: 2009-04-08T17:37:17.000Z (over 15 years ago)
• Default Branch: master
• Last Pushed: 2013-02-03T16:35:20.000Z (almost 12 years ago)
• Last Synced: 2024-05-11T20:40:53.640Z (6 months ago)
• Language: Ruby
• Homepage:
• Size: 515 KB
• Stars: 54
• Watchers: 3
• Forks: 33
• Open Issues: 6
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

        
# dm-accepts_nested_attributes

A DataMapper plugin that allows nested model attribute assignment like activerecord does.

Current documentation can always be found at [rdoc.info](http://rdoc.info/projects/snusnu/dm-accepts_nested_attributes)

## Examples

The following example illustrates the use of this plugin.

    require "rubygems"

    

    require "dm-core"

    require "dm-validations"

    require "dm-accepts_nested_attributes"

    

    DataMapper::Logger.new(STDOUT, :debug)  

    DataMapper.setup(:default, 'sqlite3::memory:')

      

    class Person

      include DataMapper::Resource

      property :id,   Serial

      property :name, String

      has 1, :profile

      has n, :project_memberships

      has n, :projects, :through => :project_memberships

    

      accepts_nested_attributes_for :profile

      accepts_nested_attributes_for :projects

    

      # adds the following instance methods

      # #profile_attributes=

      # #profile_attributes

      # #projects_attributes=

      # #projects_attributes

    end

    

    class Profile

      include DataMapper::Resource

      property :id,      Serial

      property :person_id, Integer

      belongs_to :person

    

      accepts_nested_attributes_for :person

    

      # adds the following instance methods

      # #person_attributes=

      # #person_attributes

    end

    

    class Project

      include DataMapper::Resource

      property :id, Serial

      has n, :tasks

      has n, :project_memberships

      has n, :people, :through => :project_memberships

    

      accepts_nested_attributes_for :tasks

      accepts_nested_attributes_for :people

      

      # adds the following instance methods

      # #tasks_attributes=

      # #tasks_attributes

      # #people_attributes=

      # #people_attributes

    end

    

    class ProjectMembership

      include DataMapper::Resource

      property :id,         Serial

      property :person_id,  Integer

      property :project_id, Integer

      belongs_to :person

      belongs_to :project

    end

    

    class Task

      include DataMapper::Resource

      property :id,         Serial

      property :project_id, Integer

      belongs_to :project

    end

    

    DataMapper.auto_migrate!

## TODO

* collect validation errors from related resources

* update README to include more complete usecases

* think about replacing :reject_if with :if and :unless