b1c544b1d1
ActiveStorage variants are processed on the fly when they are needed but
sometimes we're sure that they are accessed and want to processed them
upfront.
`preprocessed` option is added when declaring variants.
```
class User < ApplicationRecord
has_one_attached :avatar do |attachable|
attachable.variant :thumb, resize_to_limit: [100, 100], preprocessed: true
end
end
```
75 lines
2.0 KiB
Ruby
75 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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module ActiveStorage
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module Reflection
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class HasAttachedReflection < ActiveRecord::Reflection::MacroReflection # :nodoc:
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def variant(name, transformations)
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named_variants[name] = NamedVariant.new(transformations)
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end
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def named_variants
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@named_variants ||= {}
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end
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end
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# Holds all the metadata about a has_one_attached attachment as it was
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# specified in the Active Record class.
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class HasOneAttachedReflection < HasAttachedReflection # :nodoc:
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def macro
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:has_one_attached
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end
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end
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# Holds all the metadata about a has_many_attached attachment as it was
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# specified in the Active Record class.
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class HasManyAttachedReflection < HasAttachedReflection # :nodoc:
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def macro
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:has_many_attached
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end
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end
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module ReflectionExtension # :nodoc:
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def add_attachment_reflection(model, name, reflection)
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model.attachment_reflections = model.attachment_reflections.merge(name.to_s => reflection)
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end
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private
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def reflection_class_for(macro)
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case macro
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when :has_one_attached
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HasOneAttachedReflection
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when :has_many_attached
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HasManyAttachedReflection
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else
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super
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end
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end
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end
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module ActiveRecordExtensions
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extend ActiveSupport::Concern
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included do
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class_attribute :attachment_reflections, instance_writer: false, default: {}
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end
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module ClassMethods
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# Returns an array of reflection objects for all the attachments in the
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# class.
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def reflect_on_all_attachments
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attachment_reflections.values
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end
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# Returns the reflection object for the named +attachment+.
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#
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# User.reflect_on_attachment(:avatar)
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# # => the avatar reflection
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#
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def reflect_on_attachment(attachment)
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attachment_reflections[attachment.to_s]
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end
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end
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end
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end
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end
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