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