Class: Tapioca::Compilers::Dsl::IdentityCache

Inherits:
Base
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/tapioca/compilers/dsl/identity_cache.rb

Overview

‘Tapioca::Compilers::DSL::IdentityCache` generates RBI files for Active Record models

that use `include IdentityCache`.

[‘IdentityCache`](github.com/Shopify/identity_cache) is a blob level caching solution to plug into Active Record.

For example, with the following Active Record class:

~~~rb # post.rb class Post < ApplicationRecord

include IdentityCache

cache_index :blog_id
cache_index :title, unique: true
cache_index :title, :review_date, unique: true

end ~~~

this generator will produce the RBI file ‘post.rbi` with the following content:

~~~rbi # post.rbi # typed: true class Post

sig { params(blog_id: T.untyped, includes: T.untyped).returns(T::Array[::Post])
def fetch_by_blog_id(blog_id, includes: nil); end

sig { params(blog_ids: T.untyped, includes: T.untyped).returns(T::Array[::Post])
def fetch_multi_by_blog_id(index_values, includes: nil); end

sig { params(title: T.untyped, includes: T.untyped).returns(::Post) }
def fetch_by_title!(title, includes: nil); end

sig { params(title: T.untyped, includes: T.untyped).returns(T.nilable(::Post)) }
def fetch_by_title(title, includes: nil); end

sig { params(index_values: T.untyped, includes: T.untyped).returns(T::Array[::Post]) }
def fetch_multi_by_title(index_values, includes: nil); end

sig { params(title: T.untyped, review_date: T.untyped, includes: T.untyped).returns(T::Array[::Post]) }
def fetch_by_title_and_review_date!(title, review_date, includes: nil); end

sig { params(title: T.untyped, review_date: T.untyped, includes: T.untyped).returns(T::Array[::Post]) }
def fetch_by_title_and_review_date(title, review_date, includes: nil); end

end ~~~

Constant Summary collapse

COLLECTION_TYPE = 
T.let(
  ->(type) { "T::Array[::#{type}]" },
  T.proc.params(type: Module).returns(String)
)

Instance Attribute Summary

Attributes inherited from Base

#processable_constants

Instance Method Summary collapse

Methods inherited from Base

#handles?, #initialize

Constructor Details

This class inherits a constructor from Tapioca::Compilers::Dsl::Base

Instance Method Details

#decorate(root, constant) ⇒ Object 



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# File 'lib/tapioca/compilers/dsl/identity_cache.rb', line 81

def decorate(root, constant)
  caches = constant.send(:all_cached_associations)
  cache_indexes = constant.send(:cache_indexes)
  return if caches.empty? && cache_indexes.empty?

  root.path(constant) do |model|
    cache_manys = constant.send(:cached_has_manys)
    cache_ones = constant.send(:cached_has_ones)
    cache_belongs = constant.send(:cached_belongs_tos)

    cache_indexes.each do |field|
      create_fetch_by_methods(field, model, constant)
    end

    cache_manys.values.each do |field|
      create_fetch_field_methods(field, model, returns_collection: true)
    end

    cache_ones.values.each do |field|
      create_fetch_field_methods(field, model, returns_collection: false)
    end

    cache_belongs.values.each do |field|
      create_fetch_field_methods(field, model, returns_collection: false)
    end
  end
end

#gather_constants ⇒ Object 



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# File 'lib/tapioca/compilers/dsl/identity_cache.rb', line 110

def gather_constants
  ::ActiveRecord::Base.descendants.select do |klass|
    klass < ::IdentityCache::WithoutPrimaryIndex
  end
end