Class: RailsOr::WhereBindingMixs

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_or/where_binding_mixs.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(where_values, bind_values) ⇒ WhereBindingMixs

Returns a new instance of WhereBindingMixs.



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# File 'lib/rails_or/where_binding_mixs.rb', line 5

def initialize(where_values, bind_values)
  @where_values = where_values
  @bind_values = bind_values
end

Instance Attribute Details

#bind_values ⇒ Object (readonly)

Returns the value of attribute bind_values.



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# File 'lib/rails_or/where_binding_mixs.rb', line 3

def bind_values
  @bind_values
end

#where_values ⇒ Object (readonly)

Returns the value of attribute where_values.



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# File 'lib/rails_or/where_binding_mixs.rb', line 2

def where_values
  @where_values
end

Instance Method Details

#&(other) ⇒ Object 



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# File 'lib/rails_or/where_binding_mixs.rb', line 18

def &(other)
  common_where_values = @where_values & other.where_values
  return select{|node| common_where_values.include?(node) }
end

#+(other) ⇒ Object 



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# File 'lib/rails_or/where_binding_mixs.rb', line 10

def +(other)
  self.class.new(@where_values + other.where_values, @bind_values + other.bind_values)
end

#-(other) ⇒ Object 



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# File 'lib/rails_or/where_binding_mixs.rb', line 14

def -(other)
  select{|node| !other.where_values.include?(node) }
end

#select ⇒ Object 



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# File 'lib/rails_or/where_binding_mixs.rb', line 23

def select
  binds_index = 0
  new_bind_values = []
  new_where_values = @where_values.select do |node|
    flag = yield(node)
    if not node.is_a?(String)
      binds_contains = node.grep(Arel::Nodes::BindParam).size
      pre_binds_index = binds_index
      binds_index += binds_contains
      (pre_binds_index...binds_index).each{|i| new_bind_values << @bind_values[i] } if flag
    end
    next flag
  end
  return self.class.new(new_where_values, new_bind_values)
end