Exception: ActionView::MissingTemplate

Inherits:
ActionViewError show all
Includes:
DidYouMean::Correctable
Defined in:
lib/action_view/template/error.rb

Overview

:nodoc:

Defined Under Namespace

Classes: Results

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(paths, path, prefixes, partial, details) ⇒ MissingTemplate

Returns a new instance of MissingTemplate.



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# File 'lib/action_view/template/error.rb', line 33

def initialize(paths, path, prefixes, partial, details, *)
  if partial && path.present?
    path = path.sub(%r{([^/]+)$}, "_\\1")
  end

  @path = path
  @paths = paths
  @prefixes = Array(prefixes)
  @partial = partial
  template_type = if partial
    "partial"
  elsif /layouts/i.match?(path)
    "layout"
  else
    "template"
  end

  searched_paths = @prefixes.map { |prefix| [prefix, path].join("/") }

  out  = "Missing #{template_type} #{searched_paths.join(", ")} with #{details.inspect}.\n\nSearched in:\n"
  out += paths.compact.map { |p| "  * #{p.to_s.inspect}\n" }.join
  super out
end

Instance Attribute Details

#partial ⇒ Object (readonly)

Returns the value of attribute partial.



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# File 'lib/action_view/template/error.rb', line 31

def partial
  @partial
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/action_view/template/error.rb', line 31

def path
  @path
end

#paths ⇒ Object (readonly)

Returns the value of attribute paths.



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# File 'lib/action_view/template/error.rb', line 31

def paths
  @paths
end

#prefixes ⇒ Object (readonly)

Returns the value of attribute prefixes.



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# File 'lib/action_view/template/error.rb', line 31

def prefixes
  @prefixes
end

Instance Method Details

#corrections ⇒ Object

Apps may have thousands of candidate templates so we attempt to generate the suggestions as efficiently as possible. First we split templates into prefixes and basenames, so that those can be matched separately.



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# File 'lib/action_view/template/error.rb', line 93

def corrections
  candidates = paths.flat_map(&:all_template_paths).uniq

  if partial
    candidates.select!(&:partial?)
  else
    candidates.reject!(&:partial?)
  end

  # Group by possible prefixes
  files_by_dir = candidates.group_by(&:prefix)
  files_by_dir.transform_values! do |files|
    files.map do |file|
      # Remove prefix
      File.basename(file.to_s)
    end
  end

  # No suggestions if there's an exact match, but wrong details
  if prefixes.any? { |prefix| files_by_dir[prefix]&.include?(path) }
    return []
  end

  cached_distance = Hash.new do |h, args|
    h[args] = -DidYouMean::Jaro.distance(*args)
  end

  results = Results.new(6)

  files_by_dir.keys.index_with do |dirname|
    prefixes.map do |prefix|
      cached_distance[[prefix, dirname]]
    end.min
  end.sort_by(&:last).each do |dirname, dirweight|
    # If our directory's score makes it impossible to find a better match
    # we can prune this search branch.
    next unless results.should_record?(dirweight - 1.0)

    files = files_by_dir[dirname]

    files.each do |file|
      fileweight = cached_distance[[path, file]]
      score = dirweight + fileweight

      results.add(File.join(dirname, file), score)
    end
  end

  if partial
    results.to_a.map { |res| res.sub(%r{_([^/]+)\z}, "\\1") }
  else
    results.to_a
  end
end