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module Arel
###
# Methods for creating various nodes
module FactoryMethods
def create_join to, constraint = nil, klass = Nodes::InnerJoin
klass.new(to, constraint)
end
def create_string_join to
create_join to, nil, Nodes::StringJoin
end
def create_and clauses
Nodes::And.new clauses
end
def create_on expr
Nodes::On.new expr
end
end
end
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