Module: Boson::View

Extended by:
View
Included in:
View
Defined in:
lib/boson/view.rb

Overview

This module generates views for a command by handing it to Hirb. Since Hirb can be customized to generate any view, commands can have any views associated with them!

Views with Render Options

To pass rendering options to a Hirb helper as command options, a command has to define the options with the render_options method attribute:

# @render_options :fields=>[:a,:b]
def list(options={})
  [{:a=>1, :b=>2}, {:a=>10,:b=>11}]
end

# To see that the render_options method attribute actually passes the :fields option by default:
>> list '-p'   # or list '--pretend'
Arguments: []
Global options: {:pretend=>true, :fields=>[:a, :b]}

>> list
+----+----+
| a  | b  |
+----+----+
| 1  | 2  |
| 10 | 11 |
+----+----+
2 rows in set

# To create a vertical table, we can pass --vertical, one of the default global render options.
>> list '-V'   # or list '--vertical'
*** 1. row ***
a: 1
b: 2
...

# To get the original return value use the global option --render
>> list '-r'  # or list '--render'
=> [{:a=>1, :b=>2}, {:a=>10,:b=>11}]

Boson and Hirb

Since Boson uses Hirb’s auto table helper by default, you may want to read up on its many options. To use any of them in commands, define them locally with render_options or globally by adding them under the :render_options key of the main config. What if you want to use your own helper class? No problem. Simply pass it with the global :class option.

When using the default helper, one of the most important options to define is :fields. Aside from controlling what fields are displayed, it’s used to set :values option attributes for related options i.e. :sort and :query. This provides handy option value aliasing via OptionParser. If you don’t set :fields, Boson will try to set its :values with field-related options i.e. :change_fields, :filters and :headers.

Instance Method Summary collapse

Instance Method Details

#class_config(klass) ⇒ Object

:stopdoc:



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# File 'lib/boson/view.rb', line 72

def class_config(klass)
  opts = (Hirb::View.formatter_config[klass] || {}).dup
  opts.delete(:ancestor)
  opts.merge!((opts.delete(:options) || {}).dup)
  OptionParser.make_mergeable!(opts)
  opts
end

#enable ⇒ Object

Enables hirb and reads a config file from the main repo’s config/hirb.yml.



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# File 'lib/boson/view.rb', line 53

def enable
  unless @enabled
    Hirb::View.enable(:config_file=>File.join(Boson.repo.config_dir, 'hirb.yml'))
    Hirb::Helpers::Table.filter_any = true
  end
  @enabled = true
end

#render(object, options = {}, return_obj = false) ⇒ Object

Renders any object via Hirb. Options are passed directly to Hirb::Console.render_output.



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# File 'lib/boson/view.rb', line 63

def render(object, options={}, return_obj=false)
  if options[:inspect]
    puts(object.inspect)
  else
    render_object(object, options, return_obj) unless silent_object?(object)
  end
end

#render_object(object, options = {}, return_obj = false) ⇒ Object 



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# File 'lib/boson/view.rb', line 88

def render_object(object, options={}, return_obj=false)
  options[:class] ||= :auto_table
  render_result = Hirb::Console.render_output(object, options)
  return_obj ? object : render_result
end

#silent_object?(obj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/boson/view.rb', line 84

def silent_object?(obj)
  [nil,false,true].include?(obj)
end

#toggle_pager ⇒ Object 



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# File 'lib/boson/view.rb', line 80

def toggle_pager
  Hirb::View.toggle_pager
end