App Engine Jruby DataMapper List Property
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20-09-2019 - |
Question
How to use list/array as property in DataMapper on Jruby on Google AppEngine?
Solution
This will work like has..and..belongs..to..many, without a join table...
class Person
include DataMapper::Resource
property :id, Serial
property :name, String, :nullable => false
property :project_ids, List
timestamps :at
# project should be flagged as archived, not deleted
def projects
Project.all(:id => project_ids)
end
end
class Project
include DataMapper::Resource
property :id, Serial
property :name, String, :nullable => false
property :archived, Boolean, :default => false
# the join table is bolted onto the person model
def people
Person.all(:project_ids => id)
end
end
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