Mike Dalessio
ef6198d394
to avoid implicitly creating a variant during a GET to a read replica, which will raise an exception and cause the image to fail to load. This feels pretty brittle, to be honest, and we'll need to be careful in the future about creating and using new variants; we will probably need to backfill the new variant for existing images because we can't guarantee that they will be created implicitly/lazily if the GET lands on the replica. ref: https://fizzy.37signals.com/5986089/collections/7/cards/942
39 lines
1.4 KiB
Ruby
39 lines
1.4 KiB
Ruby
module Attachments
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extend ActiveSupport::Concern
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# The variants we use must all declared here so that we can preprocess them.
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#
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# If they are not preprocessed, then Rails will attempt to transform the image on-the-fly when
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# they are first viewed, which may be on the read replica where writing to the database is not
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# allowed. Chaos will ensue if that happens.
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#
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# These variants are patched into ActionText::RichText in config/initializers/action_text.rb
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VARIANTS = {
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# vipsthumbnail used to create sized image variants has a intent setting to manage colors during
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# resize. By setting an invalid intent value the gif-incompatible intent filtering is skipped and
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# the gif can be rendered with all its frame intact.
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#
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# Only `n` is accepted as an override, using the full parameter name `intent` doesn’t work.
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#
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# This was cargo-culted from know-it-all and I imagine it may be fixed at some point.
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small: { loader: { n: -1 }, resize_to_limit: [ 800, 600 ] },
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large: { loader: { n: -1 }, resize_to_limit: [ 1024, 768 ] }
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}
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def attachments
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rich_text_record&.embeds || []
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end
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def has_attachments?
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attachments.any?
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end
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private
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def rich_text_record
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@rich_text_record ||= begin
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association = self.class.reflect_on_all_associations(:has_one).find { it.klass == ActionText::RichText }
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public_send(association.name)
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end
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end
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end
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