class ActionView::Template
Action View Template
Attributes
Public Class Methods
# 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
# 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
# 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
# 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.
# File actionview/lib/action_view/template.rb, line 165 def formats; Array(format); end
# File actionview/lib/action_view/template.rb, line 164 def formats=(_); end
# File actionview/lib/action_view/template.rb, line 199 def inspect "#<#{self.class.name} #{short_identifier} locals=#{@locals.inspect}>" end
# 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"
# File actionview/lib/action_view/template.rb, line 163 def locals=(_); end
# File actionview/lib/action_view/template.rb, line 168 def refresh(_); self; end
# 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.
# File actionview/lib/action_view/template.rb, line 195 def short_identifier @short_identifier ||= defined?(Rails.root) ? identifier.sub("#{Rails.root}/", "") : identifier end
# File actionview/lib/action_view/template.rb, line 203 def source @source.to_s end
# 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.
# File actionview/lib/action_view/template.rb, line 191 def type @type ||= Types[format] end
# File actionview/lib/action_view/template.rb, line 167 def variants; [variant]; end
# File actionview/lib/action_view/template.rb, line 166 def variants=(_); end
# File actionview/lib/action_view/template.rb, line 162 def virtual_path=(_); end
© 2004–2019 David Heinemeier Hansson
Licensed under the MIT License.