App Engine jruby Lista DataMapper Propiedad
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20-09-2019 - |
Pregunta
Como lista / matriz utilizar como propiedad en DataMapper en jruby en Google App Engine?
Solución
Esto funcionará como has..and..belongs..to..many, sin una tabla de unión ...
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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