Class: BulkDependencyEraser::Nullifier

Inherits:
Base
  • Object
show all
Defined in:
lib/bulk_dependency_eraser/nullifier.rb

Constant Summary collapse

DEFAULT_OPTS = 
{
  verbose: false,
  db_nullify_wrapper: self::DEFAULT_DB_WRAPPER
}.freeze

Constants inherited from Base

Base::DEFAULT_DB_WRAPPER

Instance Attribute Summary

Attributes inherited from Base

#errors

Instance Method Summary collapse

Constructor Details

#initialize(class_names_columns_and_ids:, opts: {}) ⇒ Nullifier

  • structure:

    {
  <model_name>: {
    column_name: <array_of_ids>
  }
}

Parameters:

  • class_names_columns_and_ids (Hash) —

    • model names with columns to nullify pointing towards the record IDs that require the nullification.

  • opts (Hash) (defaults to: {}) —

    • hash of options, allowlisted in DEFAULT_OPTS



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# File 'lib/bulk_dependency_eraser/nullifier.rb', line 16

def initialize class_names_columns_and_ids:, opts: {}
  @class_names_columns_and_ids = class_names_columns_and_ids
  super(opts:)
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/bulk_dependency_eraser/nullifier.rb', line 21

def execute
  ActiveRecord::Base.transaction do
    current_class_name = 'N/A'
    current_column = 'N/A'
    begin
      class_names_columns_and_ids.keys.reverse.each do |class_name|
        current_class_name = class_name
        klass = class_name.constantize

        columns_and_ids = class_names_columns_and_ids[class_name]

        columns_and_ids.each do |column, ids|
          current_column = column
          # Disable any ActiveRecord::InvalidForeignKey raised errors.
          # src https://stackoverflow.com/questions/41005849/rails-migrations-temporarily-ignore-foreign-key-constraint
          #     https://apidock.com/rails/ActiveRecord/ConnectionAdapters/AbstractAdapter/disable_referential_integrity
          ActiveRecord::Base.connection.disable_referential_integrity do
            nullify_in_db do
              klass.unscoped.where(id: ids).update_all(column => nil)
            end
          end
        end
      end
    rescue Exception => e
      report_error("Issue attempting to nullify '#{current_class_name}' column '#{current_column}': #{e.name} - #{e.message}")
      raise ActiveRecord::Rollback
    end
  end

  return errors.none?
end