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require 'mongoid'
module Mongoid
module Document
module ClassMethods
include OrmAdapter::ToAdapter
end
class OrmAdapter < ::OrmAdapter::Base
# get a list of column names for a given class
def column_names
klass.fields.keys
end
# @see OrmAdapter::Base#get!
def get!(id)
klass.find(wrap_key(id))
end
# @see OrmAdapter::Base#get
def get(id)
klass.where(:_id => wrap_key(id)).first
end
# @see OrmAdapter::Base#find_first
def find_first(options = {})
conditions, order = extract_conditions!(options)
klass.limit(1).where(conditions_to_fields(conditions)).order_by(order).first
end
# @see OrmAdapter::Base#find_all
def find_all(options = {})
conditions, order, limit, offset = extract_conditions!(options)
klass.where(conditions_to_fields(conditions)).order_by(order).limit(limit).offset(offset)
end
# @see OrmAdapter::Base#create!
def create!(attributes = {})
klass.create!(attributes)
end
# @see OrmAdapter::Base#destroy
def destroy(object)
object.destroy if valid_object?(object)
end
protected
# converts and documents to ids
def conditions_to_fields(conditions)
conditions.inject({}) do |fields, (key, value)|
if value.is_a?(Mongoid::Document) && klass.fields.keys.include?("#{key}_id")
fields.merge("#{key}_id" => value.id)
elsif key.to_s == 'id'
fields.merge('_id' => value)
else
fields.merge(key => value)
end
end
end
end
end
end
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