Sha256: 8e4e9dc4d8307e5534df96bf3f2c542d1654bec482cc3885fadd22969d6e8898
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Size: 1.24 KB
Versions: 35
Compression:
Stored size: 1.24 KB
Contents
module ROM
class Relation
# Interface for objects that can be materialized into a loaded relation
#
# @api public
module Materializable
# @abstract
#
# @api public
def call(*)
raise NotImplementedError, "#{self.class}#call must be implemented"
end
# Coerce the relation to an array
#
# @return [Array]
#
# @api public
def to_a
call.to_a
end
alias_method :to_ary, :to_a
# Yield relation tuples
#
# @yield [Hash,Object]
#
# @api public
def each(&block)
return to_enum unless block
to_a.each { |tuple| yield(tuple) }
end
# Delegate to loaded relation and return one object
#
# @return [Object]
#
# @see Loaded#one
#
# @api public
def one
call.one
end
# Delegate to loaded relation and return one object
#
# @return [Object]
#
# @see Loaded#one
#
# @api public
def one!
call.one!
end
# Return first tuple from a relation coerced to an array
#
# @return [Object]
#
# @api public
def first
to_a.first
end
end
end
end
Version data entries
35 entries across 35 versions & 2 rubygems