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 33

def any?
  false
end

#average ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 53

def average(*)
  calculate :average, nil
end

#calculate(operation, _column_name, _options = {}) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 65

def calculate(operation, _column_name, _options = {})
  # TODO: Remove _options argument as soon we remove support to
  # activerecord-deprecated_finders.
  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 45

def count(*)
  calculate :count, nil
end

#delete(_id_or_array) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 21

def delete(_id_or_array)
  0
end

#delete_all(_conditions = nil) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 13

def delete_all(_conditions = nil)
  0
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 29

def empty?
  true
end

#exec_queries ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 5

def exec_queries
  @records = []
end

#exists?(_id = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 77

def exists?(_id = false)
  false
end

#many? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/null_relation.rb', line 37

def many?
  false
end

#maximum ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 61

def maximum(*)
  calculate :maximum, nil
end

#minimum ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 57

def minimum(*)
  calculate :minimum, nil
end

#pluck(*column_names) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 9

def pluck(*column_names)
  []
end

#size ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 25

def size
  calculate :size, nil
end

#sum ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 49

def sum(*)
  calculate :sum, nil
end

#to_sql ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 41

def to_sql
  ""
end

#update_all(_updates, _conditions = nil, _options = {}) ⇒ Object 



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# File 'lib/active_record/null_relation.rb', line 17

def update_all(_updates, _conditions = nil, _options = {})
  0
end