instance method `excerpt`

Ruby on Rails 4.1.16

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

excerpt(text, phrase, options = {})

Extracts an excerpt from text that matches the first instance of phrase. The :radius option expands the excerpt on each side of the first occurrence of phrase by the number of characters defined in :radius (which defaults to 100). If the excerpt radius overflows the beginning or end of the text, then the :omission option (which defaults to “…”) will be prepended/appended accordingly. Use the :separator option to choose the delimitation. The resulting string will be stripped in any case. If the phrase isn’t found, nil is returned.

excerpt('This is an example', 'an', radius: 5)
# => ...s is an exam...

excerpt('This is an example', 'is', radius: 5)
# => This is a...

excerpt('This is an example', 'is')
# => This is an example

excerpt('This next thing is an example', 'ex', radius: 2)
# => ...next...

excerpt('This is also an example', 'an', radius: 8, omission: '<chop> ')
# => <chop> is also an example

excerpt('This is a very beautiful morning', 'very', separator: ' ', radius: 1)
# => ...a very beautiful...

Parameters

text req
phrase req
options opt = {}

Source

# File actionview/lib/action_view/helpers/text_helper.rb, line 155
      def excerpt(text, phrase, options = {})
        return unless text && phrase

        separator = options[:separator] || ''
        phrase    = Regexp.escape(phrase)
        regex     = /#{phrase}/i

        return unless matches = text.match(regex)
        phrase = matches[0]

        unless separator.empty?
          text.split(separator).each do |value|
            if value.match(regex)
              regex = phrase = value
              break
            end
          end
        end

        first_part, second_part = text.split(regex, 2)

        prefix, first_part   = cut_excerpt_part(:first, first_part, separator, options)
        postfix, second_part = cut_excerpt_part(:second, second_part, separator, options)

        affix = [first_part, separator, phrase, separator, second_part].join.strip
        [prefix, affix, postfix].join
      end

Defined in actionview/lib/action_view/helpers/text_helper.rb line 155 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionView::Helpers::TextHelper

Signature

Parameters