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|
module Arel
module Predicates
class Binary < Predicate
def to_sql(formatter = nil)
"#{operand1.to_sql} #{predicate_sql} #{operand1.format(operand2)}"
end
end
class Unary < Predicate
def to_sql(formatter = nil)
"#{predicate_sql} (#{operand.to_sql(formatter)})"
end
end
class Not < Unary
def predicate_sql; "NOT" end
end
class CompoundPredicate < Binary
def to_sql(formatter = nil)
"(#{operand1.to_sql(formatter)} #{predicate_sql} #{operand2.to_sql(formatter)})"
end
end
class Or < CompoundPredicate
def predicate_sql; "OR" end
end
class And < CompoundPredicate
def predicate_sql; "AND" end
end
class Polyadic < Predicate
def to_sql(formatter = nil)
"(" +
predicates.map {|p| p.to_sql(formatter)}.join(" #{predicate_sql} ") +
")"
end
end
class Any < Polyadic
def predicate_sql; "OR" end
end
class All < Polyadic
def predicate_sql; "AND" end
end
class Equality < Binary
def predicate_sql
operand2.equality_predicate_sql
end
end
class Inequality < Binary
def predicate_sql
operand2.inequality_predicate_sql
end
end
class GreaterThanOrEqualTo < Binary
def predicate_sql; '>=' end
end
class GreaterThan < Binary
def predicate_sql; '>' end
end
class LessThanOrEqualTo < Binary
def predicate_sql; '<=' end
end
class LessThan < Binary
def predicate_sql; '<' end
end
class Match < Binary
def predicate_sql; 'LIKE' end
end
class NotMatch < Binary
def predicate_sql; 'NOT LIKE' end
end
class In < Binary
def to_sql(formatter = nil)
if operand2.is_a?(Range) && operand2.exclude_end?
GreaterThanOrEqualTo.new(operand1, operand2.begin).and(
LessThan.new(operand1, operand2.end)
).to_sql(formatter)
else
super
end
end
def predicate_sql; operand2.inclusion_predicate_sql end
end
class NotIn < Binary
def predicate_sql; operand2.exclusion_predicate_sql end
end
end
end
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