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module ActiveRecord
class AttributeSet # :nodoc:
class Builder # :nodoc:
attr_reader :types
def initialize(types)
@types = types
end
def build_from_database(values = {}, additional_types = {})
build_from_database_pairs(values.keys, values.values, additional_types)
end
def build_from_database_pairs(columns, values, additional_types)
attributes = build_attributes_from_values(columns, values, additional_types)
add_uninitialized_attributes(attributes)
AttributeSet.new(attributes)
end
private
def build_attributes_from_values(columns, values, additional_types)
# We are performing manual iteration here as this method is a performance
# hotspot
hash = {}
index = 0
length = columns.length
while index < length
name = columns[index]
value = values[index]
type = additional_types.fetch(name, types[name])
hash[name] = Attribute.from_database(name, value, type)
index += 1
end
hash
end
def add_uninitialized_attributes(attributes)
types.each_key do |name|
next if attributes.key? name
type = types[name]
attributes[name] =
Attribute.uninitialized(name, type)
end
end
end
end
end
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