method

excerpt

v4.1.8 - Show latest stable - 1 note - Class: ActionView::Helpers::TextHelper

excerpt(text, phrase, options = {}) public

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...

Show 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}/

        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

September 23, 2008 - (<= v2.1.0)

1 thank

Description copied from Rails 2.0

Extracts an excerpt from text that matches the first instance of phrase. The radius 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 excerpt_string will be prepended/appended accordingly. If the phrase isn‘t found, nil is returned.

Examples

excerpt('This is an example', 'an', 5)
# => "...s is an examp..."

excerpt('This is an example', 'is', 5)
# => "This is an..."

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

excerpt('This next thing is an example', 'ex', 2)
# => "...next t..."

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

excerpt

Related methods

Description copied from Rails 2.0

Examples