Module: ActiveRecord::NullRelation

Defined in:
lib/active_record/null_relation.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#any? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 35

def any?
  false
end

#average ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 59

def average(*)
  calculate :average, nil
end

#calculate(operation, _column_name) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 71

def calculate(operation, _column_name)
  if [:count, :sum, :size].include? operation
    group_values.any? ? Hash.new : 0
  elsif [:average, :minimum, :maximum].include?(operation) && group_values.any?
    Hash.new
  else
    nil
  end
end

#count ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 51

def count(*)
  calculate :count, nil
end

#delete(_id_or_array) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 19

def delete(_id_or_array)
  0
end

#delete_all(_conditions = nil) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 11

def delete_all(_conditions = nil)
  0
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 27

def empty?
  true
end

#exec_queries ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 3

def exec_queries
  @records = [].freeze
end

#exists?(_conditions = :none) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 81

def exists?(_conditions = :none)
  false
end

#many? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 43

def many?
  false
end

#maximum ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 67

def maximum(*)
  calculate :maximum, nil
end

#minimum ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 63

def minimum(*)
  calculate :minimum, nil
end

#none? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 31

def none?
  true
end

#one? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 39

def one?
  false
end

#or(other) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 85

def or(other)
  other.spawn
end

#pluck(*column_names) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 7

def pluck(*column_names)
  []
end

#size ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 23

def size
  calculate :size, nil
end

#sum ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 55

def sum(*)
  calculate :sum, nil
end

#to_sql ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 47

def to_sql
  ""
end

#update_all(_updates) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 15

def update_all(_updates)
  0
end