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/Ruby on Rails 6.0

class ActionView::Template

Parent:
Object

Action View Template

Attributes

format[R]
handler[R]
identifier[R]
locals[R]
original_encoding[R]
updated_at[R]
variable[R]
variant[R]
virtual_path[R]

Public Class Methods

finalize_compiled_template_methods() Show source
# File actionview/lib/action_view/template.rb, line 14
def self.finalize_compiled_template_methods
  ActiveSupport::Deprecation.warn "ActionView::Template.finalize_compiled_template_methods is deprecated and has no effect"
end
finalize_compiled_template_methods=(_) Show source
# File actionview/lib/action_view/template.rb, line 18
def self.finalize_compiled_template_methods=(_)
  ActiveSupport::Deprecation.warn "ActionView::Template.finalize_compiled_template_methods= is deprecated and has no effect"
end
new(source, identifier, handler, format: nil, variant: nil, locals: nil, virtual_path: nil, updated_at: nil) Show source
# File actionview/lib/action_view/template.rb, line 130
def initialize(source, identifier, handler, format: nil, variant: nil, locals: nil, virtual_path: nil, updated_at: nil)
  unless locals
    ActiveSupport::Deprecation.warn "ActionView::Template#initialize requires a locals parameter"
    locals = []
  end

  @source            = source
  @identifier        = identifier
  @handler           = handler
  @compiled          = false
  @locals            = locals
  @virtual_path      = virtual_path

  @variable = if @virtual_path
    base = @virtual_path[-1] == "/" ? "" : ::File.basename(@virtual_path)
    base =~ /\A_?(.*?)(?:\.\w+)*\z/
    $1.to_sym
  end

  if updated_at
    ActiveSupport::Deprecation.warn "ActionView::Template#updated_at is deprecated"
    @updated_at        = updated_at
  else
    @updated_at        = Time.now
  end
  @format            = format
  @variant           = variant
  @compile_mutex     = Mutex.new
end

Public Instance Methods

encode!() Show source
# File actionview/lib/action_view/template.rb, line 217
def encode!
  source = self.source

  return source unless source.encoding == Encoding::BINARY

  # Look for # encoding: *. If we find one, we'll encode the
  # String in that encoding, otherwise, we'll use the
  # default external encoding.
  if source.sub!(/\A#{ENCODING_FLAG}/, "")
    encoding = magic_encoding = $1
  else
    encoding = Encoding.default_external
  end

  # Tag the source with the default external encoding
  # or the encoding specified in the file
  source.force_encoding(encoding)

  # If the user didn't specify an encoding, and the handler
  # handles encodings, we simply pass the String as is to
  # the handler (with the default_external tag)
  if !magic_encoding && @handler.respond_to?(:handles_encoding?) && @handler.handles_encoding?
    source
  # Otherwise, if the String is valid in the encoding,
  # encode immediately to default_internal. This means
  # that if a handler doesn't handle encodings, it will
  # always get Strings in the default_internal
  elsif source.valid_encoding?
    source.encode!
  # Otherwise, since the String is invalid in the encoding
  # specified, raise an exception
  else
    raise WrongEncodingError.new(source, encoding)
  end
end

This method is responsible for properly setting the encoding of the source. Until this point, we assume that the source is BINARY data. If no additional information is supplied, we assume the encoding is the same as Encoding.default_external.

The user can also specify the encoding via a comment on the first line of the template (# encoding: NAME-OF-ENCODING). This will work with any template engine, as we process out the encoding comment before passing the source on to the template engine, leaving a blank line in its stead.

formats() Show source
# File actionview/lib/action_view/template.rb, line 165
def formats; Array(format); end
formats=(_) Show source
# File actionview/lib/action_view/template.rb, line 164
def formats=(_); end
inspect() Show source
# File actionview/lib/action_view/template.rb, line 199
def inspect
  "#<#{self.class.name} #{short_identifier} locals=#{@locals.inspect}>"
end
local_assigns() Show source
# File actionview/lib/action_view/template.rb, line 114
eager_autoload do
  autoload :Error
  autoload :RawFile
  autoload :Handlers
  autoload :HTML
  autoload :Inline
  autoload :Sources
  autoload :Text
  autoload :Types
end

Returns a hash with the defined local variables.

Given this sub template rendering:

<%= render "shared/header", { headline: "Welcome", person: person } %>

You can use local_assigns in the sub templates to access the local variables:

local_assigns[:headline] # => "Welcome"
locals=(_) Show source
# File actionview/lib/action_view/template.rb, line 163
def locals=(_); end
refresh(_) Show source
# File actionview/lib/action_view/template.rb, line 168
def refresh(_); self; end
render(view, locals, buffer = ActionView::OutputBuffer.new, &block) Show source
# File actionview/lib/action_view/template.rb, line 182
def render(view, locals, buffer = ActionView::OutputBuffer.new, &block)
  instrument_render_template do
    compile!(view)
    view._run(method_name, self, locals, buffer, &block)
  end
rescue => e
  handle_render_error(view, e)
end

Render a template. If the template was not compiled yet, it is done exactly before rendering.

This method is instrumented as “!render_template.action_view”. Notice that we use a bang in this instrumentation because you don't want to consume this in production. This is only slow if it's being listened to.

short_identifier() Show source
# File actionview/lib/action_view/template.rb, line 195
def short_identifier
  @short_identifier ||= defined?(Rails.root) ? identifier.sub("#{Rails.root}/", "") : identifier
end
source() Show source
# File actionview/lib/action_view/template.rb, line 203
def source
  @source.to_s
end
supports_streaming?() Show source
# File actionview/lib/action_view/template.rb, line 172
def supports_streaming?
  handler.respond_to?(:supports_streaming?) && handler.supports_streaming?
end

Returns whether the underlying handler supports streaming. If so, a streaming buffer may be passed when it starts rendering.

type() Show source
# File actionview/lib/action_view/template.rb, line 191
def type
  @type ||= Types[format]
end
variants() Show source
# File actionview/lib/action_view/template.rb, line 167
def variants; [variant]; end
variants=(_) Show source
# File actionview/lib/action_view/template.rb, line 166
def variants=(_); end
virtual_path=(_) Show source
# File actionview/lib/action_view/template.rb, line 162
def virtual_path=(_); end

© 2004–2019 David Heinemeier Hansson
Licensed under the MIT License.