diff options
Diffstat (limited to 'actionview/lib/action_view/renderer')
5 files changed, 122 insertions, 40 deletions
diff --git a/actionview/lib/action_view/renderer/partial_renderer.rb b/actionview/lib/action_view/renderer/partial_renderer.rb index 0407632435..39c8658ffe 100644 --- a/actionview/lib/action_view/renderer/partial_renderer.rb +++ b/actionview/lib/action_view/renderer/partial_renderer.rb @@ -1,4 +1,5 @@ -require 'thread_safe' +require 'action_view/renderer/partial_renderer/collection_caching' +require 'concurrent' module ActionView class PartialIteration @@ -73,7 +74,7 @@ module ActionView # # <%= render partial: "account", locals: { user: @buyer } %> # - # == Rendering a collection of partials + # == \Rendering a collection of partials # # The example of partial use describes a familiar pattern where a template needs to iterate over an array and # render a sub template for each of the elements. This pattern has been implemented as a single method that @@ -105,7 +106,7 @@ module ActionView # NOTE: Due to backwards compatibility concerns, the collection can't be one of hashes. Normally you'd also # just keep domain objects, like Active Records, in there. # - # == Rendering shared partials + # == \Rendering shared partials # # Two controllers can share a set of partials and render them like this: # @@ -113,7 +114,7 @@ module ActionView # # This will render the partial "advertisement/_ad.html.erb" regardless of which controller this is being called from. # - # == Rendering objects that respond to `to_partial_path` + # == \Rendering objects that respond to `to_partial_path` # # Instead of explicitly naming the location of a partial, you can also let PartialRenderer do the work # and pick the proper path by checking `to_partial_path` method. @@ -127,7 +128,7 @@ module ActionView # # <%= render partial: "posts/post", collection: @posts %> # <%= render partial: @posts %> # - # == Rendering the default case + # == \Rendering the default case # # If you're not going to be using any of the options like collections or layouts, you can also use the short-hand # defaults of render to render partials. Examples: @@ -147,29 +148,29 @@ module ActionView # # <%= render partial: "posts/post", collection: @posts %> # <%= render @posts %> # - # == Rendering partials with layouts + # == \Rendering partials with layouts # # Partials can have their own layouts applied to them. These layouts are different than the ones that are # specified globally for the entire action, but they work in a similar fashion. Imagine a list with two types # of users: # - # <%# app/views/users/index.html.erb &> + # <%# app/views/users/index.html.erb %> # Here's the administrator: # <%= render partial: "user", layout: "administrator", locals: { user: administrator } %> # # Here's the editor: # <%= render partial: "user", layout: "editor", locals: { user: editor } %> # - # <%# app/views/users/_user.html.erb &> + # <%# app/views/users/_user.html.erb %> # Name: <%= user.name %> # - # <%# app/views/users/_administrator.html.erb &> + # <%# app/views/users/_administrator.html.erb %> # <div id="administrator"> # Budget: $<%= user.budget %> # <%= yield %> # </div> # - # <%# app/views/users/_editor.html.erb &> + # <%# app/views/users/_editor.html.erb %> # <div id="editor"> # Deadline: <%= user.deadline %> # <%= yield %> @@ -232,7 +233,7 @@ module ActionView # # You can also apply a layout to a block within any template: # - # <%# app/views/users/_chief.html.erb &> + # <%# app/views/users/_chief.html.erb %> # <%= render(layout: "administrator", locals: { user: chief }) do %> # Title: <%= chief.title %> # <% end %> @@ -249,13 +250,13 @@ module ActionView # If you pass arguments to "yield" then this will be passed to the block. One way to use this is to pass # an array to layout and treat it as an enumerable. # - # <%# app/views/users/_user.html.erb &> + # <%# app/views/users/_user.html.erb %> # <div class="user"> # Budget: $<%= user.budget %> # <%= yield user %> # </div> # - # <%# app/views/users/index.html.erb &> + # <%# app/views/users/index.html.erb %> # <%= render layout: @users do |user| %> # Title: <%= user.title %> # <% end %> @@ -264,14 +265,14 @@ module ActionView # # You can also yield multiple times in one layout and use block arguments to differentiate the sections. # - # <%# app/views/users/_user.html.erb &> + # <%# app/views/users/_user.html.erb %> # <div class="user"> # <%= yield user, :header %> # Budget: $<%= user.budget %> # <%= yield user, :footer %> # </div> # - # <%# app/views/users/index.html.erb &> + # <%# app/views/users/index.html.erb %> # <%= render layout: @users do |user, section| %> # <%- case section when :header -%> # Title: <%= user.title %> @@ -280,8 +281,10 @@ module ActionView # <%- end -%> # <% end %> class PartialRenderer < AbstractRenderer - PREFIXED_PARTIAL_NAMES = ThreadSafe::Cache.new do |h, k| - h[k] = ThreadSafe::Cache.new + include CollectionCaching + + PREFIXED_PARTIAL_NAMES = Concurrent::Map.new do |h, k| + h[k] = Concurrent::Map.new end def initialize(*) @@ -321,8 +324,9 @@ module ActionView spacer = find_template(@options[:spacer_template], @locals.keys).render(@view, @locals) end - result = @template ? collection_with_template : collection_without_template - result.join(spacer).html_safe + cache_collection_render do + @template ? collection_with_template : collection_without_template + end.join(spacer).html_safe end def render_partial @@ -334,7 +338,7 @@ module ActionView end object ||= locals[as] - locals[as] = object + locals[as] = object if @has_object content = @template.render(view, locals) do |*name| view._layout_for(*name, &block) @@ -344,8 +348,6 @@ module ActionView content end - private - # Sets up instance variables needed for rendering a partial. This method # finds the options and details and extracts them. The method also contains # logic that handles the type of object passed in as the partial. @@ -366,10 +368,12 @@ module ActionView partial = options[:partial] if String === partial + @has_object = options.key?(:object) @object = options[:object] @collection = collection_from_options @path = partial else + @has_object = true @object = partial @collection = collection_from_object || collection_from_options @@ -382,7 +386,7 @@ module ActionView end if as = options[:as] - raise_invalid_identifier(as) unless as.to_s =~ /\A[a-z_]\w*\z/ + raise_invalid_option_as(as) unless as.to_s =~ /\A[a-z_]\w*\z/ as = as.to_sym end @@ -506,7 +510,7 @@ module ActionView def retrieve_template_keys keys = @locals.keys - keys << @variable if @object || @collection + keys << @variable if @has_object || @collection if @collection keys << @variable_counter keys << @variable_iteration @@ -516,8 +520,8 @@ module ActionView def retrieve_variable(path, as) variable = as || begin - base = path[-1] == "/" ? "" : File.basename(path) - raise_invalid_identifier(path) unless base =~ /\A_?([a-z]\w*)(\.\w+)*\z/ + base = path[-1] == "/".freeze ? "".freeze : File.basename(path) + raise_invalid_identifier(path) unless base =~ /\A_?(.*)(?:\.\w+)*\z/ $1.to_sym end if @collection @@ -528,11 +532,18 @@ module ActionView end IDENTIFIER_ERROR_MESSAGE = "The partial name (%s) is not a valid Ruby identifier; " + - "make sure your partial name starts with a lowercase letter or underscore, " + + "make sure your partial name starts with underscore." + + OPTION_AS_ERROR_MESSAGE = "The value (%s) of the option `as` is not a valid Ruby identifier; " + + "make sure it starts with lowercase letter, " + "and is followed by any combination of letters, numbers and underscores." def raise_invalid_identifier(path) raise ArgumentError.new(IDENTIFIER_ERROR_MESSAGE % (path)) end + + def raise_invalid_option_as(as) + raise ArgumentError.new(OPTION_AS_ERROR_MESSAGE % (as)) + end end end diff --git a/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb b/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb new file mode 100644 index 0000000000..1147963882 --- /dev/null +++ b/actionview/lib/action_view/renderer/partial_renderer/collection_caching.rb @@ -0,0 +1,70 @@ +require 'active_support/core_ext/object/try' + +module ActionView + module CollectionCaching # :nodoc: + extend ActiveSupport::Concern + + included do + # Fallback cache store if Action View is used without Rails. + # Otherwise overridden in Railtie to use Rails.cache. + mattr_accessor(:collection_cache) { ActiveSupport::Cache::MemoryStore.new } + end + + private + def cache_collection_render + return yield unless cache_collection? + + keyed_collection = collection_by_cache_keys + partial_cache = collection_cache.read_multi(*keyed_collection.keys) + + @collection = keyed_collection.reject { |key, _| partial_cache.key?(key) }.values + rendered_partials = @collection.any? ? yield.dup : [] + + fetch_or_cache_partial(partial_cache, order_by: keyed_collection.each_key) do + rendered_partials.shift + end + end + + def cache_collection? + @options.fetch(:cache, automatic_cache_eligible?) + end + + def automatic_cache_eligible? + single_template_render? && !callable_cache_key? && + @template.eligible_for_collection_caching?(as: @options[:as]) + end + + def single_template_render? + @template # Template is only set when a collection renders one template. + end + + def callable_cache_key? + @options[:cache].respond_to?(:call) + end + + def collection_by_cache_keys + seed = callable_cache_key? ? @options[:cache] : ->(i) { i } + + @collection.each_with_object({}) do |item, hash| + hash[expanded_cache_key(seed.call(item))] = item + end + end + + def expanded_cache_key(key) + key = @view.fragment_cache_key(@view.cache_fragment_name(key, virtual_path: @template.virtual_path)) + key.frozen? ? key.dup : key # #read_multi & #write may require mutability, Dalli 2.6.0. + end + + def fetch_or_cache_partial(cached_partials, order_by:) + cache_options = @options[:cache_options] || @locals[:cache_options] || {} + + order_by.map do |key| + cached_partials.fetch(key) do + yield.tap do |rendered_partial| + collection_cache.write(key, rendered_partial, cache_options) + end + end + end + end + end +end diff --git a/actionview/lib/action_view/renderer/renderer.rb b/actionview/lib/action_view/renderer/renderer.rb index 964b18337e..1bee35d80d 100644 --- a/actionview/lib/action_view/renderer/renderer.rb +++ b/actionview/lib/action_view/renderer/renderer.rb @@ -37,7 +37,7 @@ module ActionView end end - # Direct accessor to template rendering. + # Direct access to template rendering. def render_template(context, options) #:nodoc: TemplateRenderer.new(@lookup_context).render(context, options) end diff --git a/actionview/lib/action_view/renderer/streaming_template_renderer.rb b/actionview/lib/action_view/renderer/streaming_template_renderer.rb index 3ab2cd36fc..f38e2764d0 100644 --- a/actionview/lib/action_view/renderer/streaming_template_renderer.rb +++ b/actionview/lib/action_view/renderer/streaming_template_renderer.rb @@ -47,7 +47,7 @@ module ActionView return [super] unless layout_name && template.supports_streaming? locals ||= {} - layout = layout_name && find_layout(layout_name, locals.keys) + layout = layout_name && find_layout(layout_name, locals.keys, [formats.first]) Body.new do |buffer| delayed_render(buffer, template, layout, @view, locals) diff --git a/actionview/lib/action_view/renderer/template_renderer.rb b/actionview/lib/action_view/renderer/template_renderer.rb index f3a48ecfa0..75217e1630 100644 --- a/actionview/lib/action_view/renderer/template_renderer.rb +++ b/actionview/lib/action_view/renderer/template_renderer.rb @@ -18,7 +18,7 @@ module ActionView # Determine the template to be rendered using the given options. def determine_template(options) - keys = options.fetch(:locals, {}).keys + keys = options.has_key?(:locals) ? options[:locals].keys : [] if options.key?(:body) Template::Text.new(options[:body]) @@ -40,7 +40,7 @@ module ActionView find_template(options[:template], options[:prefixes], false, keys, @details) end else - raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file, :plain, :text or :body option." + raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file, :plain, :html, :text or :body option." end end @@ -57,7 +57,7 @@ module ActionView end def render_with_layout(path, locals) #:nodoc: - layout = path && find_layout(path, locals.keys) + layout = path && find_layout(path, locals.keys, [formats.first]) content = yield(layout) if layout @@ -72,27 +72,28 @@ module ActionView # This is the method which actually finds the layout using details in the lookup # context object. If no layout is found, it checks if at least a layout with # the given name exists across all details before raising the error. - def find_layout(layout, keys) - with_layout_format { resolve_layout(layout, keys) } + def find_layout(layout, keys, formats) + resolve_layout(layout, keys, formats) end - def resolve_layout(layout, keys) + def resolve_layout(layout, keys, formats) + details = @details.dup + details[:formats] = formats + case layout when String begin if layout =~ /^\// - with_fallbacks { find_template(layout, nil, false, keys, @details) } + with_fallbacks { find_template(layout, nil, false, keys, details) } else - find_template(layout, nil, false, keys, @details) + find_template(layout, nil, false, keys, details) end rescue ActionView::MissingTemplate all_details = @details.merge(:formats => @lookup_context.default_formats) raise unless template_exists?(layout, nil, false, keys, all_details) end when Proc - resolve_layout(layout.call, keys) - when FalseClass - nil + resolve_layout(layout.call(formats), keys, formats) else layout end |