Class: Perpetuity::MongoDB::QueryExpression

Inherits:
Object
  • Object
show all
Defined in:
lib/perpetuity/mongodb/query_expression.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attribute, comparator, value) ⇒ QueryExpression

Returns a new instance of QueryExpression.



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 9

def initialize attribute, comparator, value
  @attribute = attribute
  @comparator = comparator
  @value = value

  @attribute = @attribute.to_sym if @attribute.respond_to? :to_sym
end

Instance Attribute Details

#comparator ⇒ Object

Returns the value of attribute comparator.



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 7

def comparator
  @comparator
end

Instance Method Details

#&(other) ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 61

def & other
  QueryIntersection.new(self, other)
end

#equals ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 21

def equals
  { @attribute => @value }
end

#function(func) ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 25

def function func
  { @attribute => { func => @value } }
end

#greater_than ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 37

def greater_than
  function '$gt'
end

#gte ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 41

def gte
  function '$gte'
end

#in ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 49

def in
  function '$in'
end

#less_than ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 29

def less_than
  function '$lt'
end

#lte ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 33

def lte
  function '$lte'
end

#matches ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 53

def matches
  { @attribute => @value }
end

#not_equal ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 45

def not_equal
  function '$ne'
end

#to_db ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 17

def to_db
  send @comparator
end

#|(other) ⇒ Object 



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# File 'lib/perpetuity/mongodb/query_expression.rb', line 57

def | other
  QueryUnion.new(self, other)
end