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|
# frozen_string_literal: true
module Arel # :nodoc: all
class TreeManager
include Arel::FactoryMethods
module StatementMethods
def take(limit)
@ast.limit = Nodes::Limit.new(Nodes.build_quoted(limit)) if limit
self
end
def offset(offset)
@ast.offset = Nodes::Offset.new(Nodes.build_quoted(offset)) if offset
self
end
def order(*expr)
@ast.orders = expr
self
end
def key=(key)
@ast.key = Nodes.build_quoted(key)
end
def key
@ast.key
end
def wheres=(exprs)
@ast.wheres = exprs
end
def where(expr)
@ast.wheres << expr
self
end
end
attr_reader :ast
def initialize
@ctx = nil
end
def to_dot
collector = Arel::Collectors::PlainString.new
collector = Visitors::Dot.new.accept @ast, collector
collector.value
end
def to_sql(engine = Table.engine)
collector = Arel::Collectors::SQLString.new
collector = engine.connection.visitor.accept @ast, collector
collector.value
end
def initialize_copy(other)
super
@ast = @ast.clone
end
def where(expr)
if Arel::TreeManager === expr
expr = expr.ast
end
@ctx.wheres << expr
self
end
end
end
|
