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|
module Arel
class UpdateManager < Arel::TreeManager
def initialize engine
super
@ast = Nodes::UpdateStatement.new
@ctx = @ast
end
def take limit
@ast.limit = Nodes::Limit.new(limit) if limit
self
end
def key= key
@ast.key = key
end
def order *expr
@ast.orders = expr
self
end
###
# UPDATE +table+
def table table
@ast.relation = table
self
end
def wheres= exprs
@ast.wheres = exprs
end
def where expr
@ast.wheres << expr
self
end
def set values
if String === values
@ast.values = [values]
else
@ast.values = values.map { |column,value|
Nodes::Assignment.new(
Nodes::UnqualifiedColumn.new(column),
value
)
}
end
self
end
end
end
|
