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module Arel
class Table
@engine = nil
class << self; attr_accessor :engine; end
attr_reader :name, :engine
def initialize name, engine = Table.engine
@name = name
@engine = engine
@columns = nil
end
def tm
TreeManager.new(@engine).from(self)
end
def where condition
tm.where condition
end
def columns
@columns ||= @engine.connection.columns(@name, "#{@name} Columns").map do |column|
Attributes.for(column).new self, column.name, column
end
end
def [] name
name = name.to_s
columns.find { |column| column.name == name }
end
end
end
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