Module: Mongoid::Config::Introspection Private

Do not use. This module is for internal use only.

Relationships & Source Files
Namespace Children
Classes: `Option`
Defined in:	lib/mongoid/config/introspection.rb

Overview

This module provides a way to inspect not only the defined configuration settings and their defaults (which are available via ‘Mongoid::Config.settings`), but also the documentation about them. It does this by scraping the mongoid/config.rb file with a regular expression to match comments with options.

Constant Summary

CONFIG_RB_PATH =

The full path to the source file of the ::Mongoid::Config module.

# File 'lib/mongoid/config/introspection.rb', line 131
```
File.absolute_path(File.join(
File.dirname(__FILE__), "../config.rb"))
```

OPTION_PATTERN =

A regular expression that looks for option declarations of the format:

# one or more lines of comments,
# followed immediately by an option
# declaration with a default value:
option :option_name, default: "something"

The regex produces three captures:

1: the (potentially multiline) comment
2: the option's name
3: the option's default value

# File 'lib/mongoid/config/introspection.rb', line 120

%r{
  (
    ((?:^\s*\#.*\n)+)  # match one or more lines of comments
    ^\s+option\s+      # followed immediately by a line declaring an option
    :(\w+),\s+         # match the option's name, followed by a comma
    default:\s+(.*?)   # match the default value for the option
    (?:,.*?)?          # skip any other configuration
  \n)                  # end with a newline
}x

Instance Method Summary

#options(include_deprecated: false) ⇒ Array<Introspection::Option> Internal use only

Extracts the available configuration options from the ::Mongoid::Config source file, and returns them as an array of hashes.

Instance Method Details

#options(include_deprecated: false) ⇒ Array<Introspection::Option>

Extracts the available configuration options from the ::Mongoid::Config source file, and returns them as an array of hashes.

Parameters:

include_deprecated (true | false) —

Whether deprecated options should be included in the list. (Default: false)

Returns:

(Array<Introspection::Option>) —

] the array of option objects representing each defined option, in alphabetical order by name.

[ GitHub ]

# File 'lib/mongoid/config/introspection.rb', line 142


def options(include_deprecated: false)
  src = File.read(CONFIG_RB_PATH)
  src.scan(OPTION_PATTERN)
    .map { |opt| Option.from_captures(opt) }
    .reject { |opt| !include_deprecated && opt.deprecated? }
    .sort_by { |opt| opt.name }
end