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This class is used to verify that all migrations have been run before loading a web page if config.active_record.migration_error is set to :page_load

Methods
C
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Class Public methods
new(app)
# File activerecord/lib/active_record/migration.rb, line 365
def initialize(app)
  @app = app
  @last_check = 0
end
Instance Public methods
call(env)
# File activerecord/lib/active_record/migration.rb, line 370
def call(env)
  if connection.supports_migrations?
    mtime = ActiveRecord::Migrator.last_migration.mtime.to_i
    if @last_check < mtime
      ActiveRecord::Migration.check_pending!(connection)
      @last_check = mtime
    end
  end
  @app.call(env)
end