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rails--rails/actionview/lib/action_view/unbound_template.rb
John Hawthorn 1fc735e5f5 De-dup Templates, introduce UnboundTemplate
Previously it's possible to have multiple copies of the "same" Template.
For example, if index.html.erb is found both the :en and :fr locale, it
will return a different Template object for each. The same can happen
with formats, variants, and handlers.

This commit de-duplicates templates, there will now only be one template
per file/virtual_path/locals tuple.

We need to consider virtual_path because both `render "index"`, and
`render "index.html"` can both find the same file but will have
different virtual_paths. IMO this is rare and should be
deprecated/removed, but it exists now so we need to consider it in order
to cache correctly.

This commit introduces a new UnboundTemplate class, which represents a
template with unknown locals. Template objects can be built from it by
using `#with_locals`. Currently, this is just a convenience around
caching templates, but I hope it's a helpful concept that could have
more utility in the future.
2019-04-12 12:30:26 -07:00

32 lines
642 B
Ruby

# frozen_string_literal: true
require "concurrent/map"
module ActionView
class UnboundTemplate
def initialize(source, identifer, handler, options)
@source = source
@identifer = identifer
@handler = handler
@options = options
@templates = Concurrent::Map.new(initial_capacity: 2)
end
def bind_locals(locals)
@templates[locals] ||= build_template(locals)
end
private
def build_template(locals)
options = @options.merge(locals: locals)
Template.new(
@source,
@identifer,
@handler,
options
)
end
end
end