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Versions: 8
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Contents
module DataMapper
class Collection
def adjust(attributes = {}, reload = false)
raise NotImplementedError, 'adjust *with* validations has not be written yet, try adjust!'
end
##
# increment or decrement attributes on a collection
#
# @example [Usage]
# * People.all.adjust(:salary => +1000)
# * Children.all(:age.gte => 18).adjust(:allowance => -100)
#
# @param attributes <Hash> A hash of attributes to adjust, and their adjustment
# @param reload <FalseClass,TrueClass> If true, affected objects will be reloaded
#
# @api public
def adjust!(attributes = {}, reload = false)
return true if attributes.empty?
reload_conditions = if reload
model_key = model.key(repository.name)
Query.target_conditions(self, model_key, model_key)
end
adjust_attributes = adjust_attributes(attributes)
repository.adjust(adjust_attributes, self)
if reload_conditions
@query.clear
@query.update(:conditions => reload_conditions)
self.reload
end
true
end
private
def adjust_attributes(attributes)
adjust_attributes = {}
model.properties(repository.name).values_at(*attributes.keys).each do |property|
adjust_attributes[property] = attributes[property.name]
end
adjust_attributes
end
end # Collection
end # DataMapper
Version data entries
8 entries across 8 versions & 1 rubygems