Class: ActsAsCalculator::PromoteTemplate

Inherits:
Object
  • Object
show all
Defined in:
lib/acts_as_calculator/promote_template.rb

Overview

Rollback. Pointing current at an older row leaves every version in place, which is what "simple version history for rollback" (docs/PLAN.md) buys over deleting the row that went wrong or racing MAX(version_number).

Class Method Summary collapse

Class Method Details

.call(template:) ⇒ Object 



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# File 'lib/acts_as_calculator/promote_template.rb', line 8

def self.call(template:)
  Template.transaction do
    Template.version_siblings_of(template).current.where.not(id: template.id)
            .update_all(current: false, updated_at: Time.current)
    # A caller's copy of an already-demoted row still reads `current == true` in memory
    # — publishing a newer version demotes it with update_all — so without this the
    # write below looks like a no-op change and never reaches the database.
    template.reload.update!(current: true)
  end

  template
end