Class: Squeel::Nodes::Predicate

Inherits:
Object
  • Object
show all
Includes:
PredicateOperators, PredicateMethods
Defined in:
lib/squeel/nodes/predicate.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from PredicateOperators

#&, #-@, #|

Methods included from PredicateMethods

included

Constructor Details

#initialize(expr, method_name = :eq, value = :__undefined__) ⇒ Predicate

Returns a new instance of Predicate.



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# File 'lib/squeel/nodes/predicate.rb', line 14

def initialize(expr, method_name = :eq, value = :__undefined__)
  @expr, @method_name, @value = expr, method_name, value
end

Instance Attribute Details

#expr ⇒ Object (readonly)

Returns the value of attribute expr.



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# File 'lib/squeel/nodes/predicate.rb', line 12

def expr
  @expr
end

#method_name ⇒ Object (readonly)

Returns the value of attribute method_name.



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# File 'lib/squeel/nodes/predicate.rb', line 12

def method_name
  @method_name
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/squeel/nodes/predicate.rb', line 11

def value
  @value
end

Instance Method Details

#%(val) ⇒ Object 



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# File 'lib/squeel/nodes/predicate.rb', line 35

def %(val)
  @value = val
  self
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/squeel/nodes/predicate.rb', line 18

def eql?(other)
  self.class.eql?(other.class) &&
  self.expr.eql?(other.expr) &&
  self.method_name.eql?(other.method_name) &&
  self.value.eql?(other.value)
end

#hash ⇒ Object 



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# File 'lib/squeel/nodes/predicate.rb', line 27

def hash
  [self.class, expr, method_name, value].hash
end

#to_sym ⇒ Object

expand_hash_conditions_for_aggregates assumes our hash keys can be converted to symbols, so this has to be implemented, but it doesn’t really have to do anything useful.



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# File 'lib/squeel/nodes/predicate.rb', line 43

def to_sym
  nil
end

#value? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/squeel/nodes/predicate.rb', line 31

def value?
  @value != :__undefined__
end