[WIP] Add simple column defaults... still need to verify none had prior db …

[jrafanie]

…defaults

[miq-bot]

Checked commit jrafanie@7748a2f with ruby 2.7.8, rubocop 1.56.3, haml-lint 0.51.0, and yamllint
2 files checked, 54 offenses detected

db/migrate/20240228190145_add_column_defaults.rb

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[kbrock]

1. Think allow_null => false is good here.
2. The allow null updates all the columns to the default value.
3. But since the update is part of a schema change, it blocks the whole database. So people tend to manually update the database and then do the schema change (i.e.: disallow null) in a separate transaction. This makes the change very verbose. Maybe we want a helper?

{
  :table1 => {
    :column1 => default,
    :column2 => default
  }
}



def migrate_null_defaults(table_name, columns)
  # can we do a single query?
  columns.each do |column_name, default|
    change_column_default(table_name, column_name, default)
  end
  model.where(columns.transform_values {|n, v| v = nil}).update_all(columns)

  # can we do a single query?
  # verify this is that much different
  columns.each do |column_name, default|
    change_column_null(table_name, column_name, false, default)
  end
end

[miq-bot]

This pull request has been automatically marked as stale because it has not been updated for at least 3 months.

If these changes are still valid, please remove the stale label, make any changes requested by reviewers (if any), and ensure that this issue is being looked at by the assigned/reviewer(s).