Class: ActiveRecordAutoValidations::AutoUniqueIndex

Inherits:
Object
  • Object
show all
Defined in:
app/services/active_record_auto_validations/auto_unique_index.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(columns:, index:, model_class:) ⇒ AutoUniqueIndex

Returns a new instance of AutoUniqueIndex.



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 8

def initialize(columns:, index:, model_class:)
  @columns = columns
  @index = index
  @model_class = model_class
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 6

def columns
  @columns
end

#index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 6

def index
  @index
end

#model_class ⇒ Object (readonly)

Returns the value of attribute model_class.



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 6

def model_class
  @model_class
end

Class Method Details

.execute!(**args) ⇒ Object 



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 2

def self.execute!(**args)
  ActiveRecordAutoValidations::AutoUniqueIndex.new(**args).perform
end

Instance Method Details

#index_columns ⇒ Object 



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 18

def index_columns
  @index_columns ||= index.columns.map { |column_name| columns.find { |column| column.name == column_name } }
end

#last_column_name ⇒ Object 



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 22

def last_column_name
  @last_column_name ||= index.columns.last
end

#perform ⇒ Object 



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 14

def perform
  model_class.validates last_column_name.to_sym, **validates_args
end

#validates_args ⇒ Object 



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# File 'app/services/active_record_auto_validations/auto_unique_index.rb', line 26

def validates_args
  rest_of_columns = index.columns.clone
  rest_of_columns.pop

  validates_args = {}

  if rest_of_columns.length.positive?
    validates_args[:uniqueness] ||= {}
    validates_args[:uniqueness][:scope] = rest_of_columns
  end

  validates_args[:allow_blank] = true if index_columns.any?(&:null)
  validates_args[:uniqueness] ||= true
  validates_args
end