Class: Filterameter::Helpers::JoinsValuesBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/filterameter/helpers/joins_values_builder.rb

Overview

# Joins Values Builder

Class JoinsValuesBuilder evaluates an array of names to return either the single entry when there is only one element in the array or a nested hash when there is more than one element. This is the argument that is passed into the ActiveRecord query method ‘joins`.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(association_names) ⇒ JoinsValuesBuilder

Returns a new instance of JoinsValuesBuilder.



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# File 'lib/filterameter/helpers/joins_values_builder.rb', line 17

def initialize(association_names)
  @association_names = association_names
end

Class Method Details

.build(association_names) ⇒ Object 



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# File 'lib/filterameter/helpers/joins_values_builder.rb', line 11

def self.build(association_names)
  return association_names.first if association_names.size == 1

  new(association_names).to_h
end

Instance Method Details

#to_h ⇒ Object 



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# File 'lib/filterameter/helpers/joins_values_builder.rb', line 21

def to_h
  {}.tap do |nested_hash|
    @association_names.reduce(nested_hash) { |memo, name| memo.store(name, {}) }
  end
end