Class: Card::Query::Reference

Inherits:
Object
  • Object
show all
Defined in:
lib/card/query/reference.rb

Constant Summary collapse

DEFINITIONS = 
{
  # syntax:
  # wql query key => [ direction, {reference_type} ]
  # direction      = :out | :in
  # reference_type =  'L' | 'I' | 'P'

  refer_to: [:out, 'L', 'I'], referred_to_by: [:in, 'L', 'I'],
  link_to:  [:out, 'L'],     linked_to_by:   [:in, 'L'],
  include:  [:out, 'I'],     included_by:    [:in, 'I']
}.freeze
FIELDMAP = 
{
  out: [:referer_id, :referee_id],
  in:  [:referee_id, :referer_id]
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key, val, parent) ⇒ Reference

Returns a new instance of Reference.



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# File 'lib/card/query/reference.rb', line 25

def initialize key, val, parent
  key = key
  val = val
  @parent = parent
  @conditions = []

  direction, *reftype = DEFINITIONS[key.to_sym]
  @infield, @outfield = FIELDMAP[direction]

  if reftype.present?
    operator = (reftype.size == 1 ? '=' : 'IN')
    quoted_letters = reftype.map { |letter| "'#{letter}'" } * ', '
    @conditions << "ref_type #{operator} (#{quoted_letters})"
  end

  if val == '_none'
    @conditions << 'present = 0'
  else
    @cardquery = val
  end

  self
end

Instance Attribute Details

#cardquery ⇒ Object

Returns the value of attribute cardquery.



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# File 'lib/card/query/reference.rb', line 19

def cardquery
  @cardquery
end

#conditions ⇒ Object

Returns the value of attribute conditions.



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# File 'lib/card/query/reference.rb', line 19

def conditions
  @conditions
end

#infield ⇒ Object

Returns the value of attribute infield.



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# File 'lib/card/query/reference.rb', line 19

def infield
  @infield
end

#outfield ⇒ Object

Returns the value of attribute outfield.



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# File 'lib/card/query/reference.rb', line 19

def outfield
  @outfield
end

Instance Method Details

#table_alias ⇒ Object 



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# File 'lib/card/query/reference.rb', line 21

def table_alias
  @table_alias ||= "cr#{@parent.table_id force = true}"
end