Model concerns organization into module namespaces (#28149)

app/models/concerns/status_safe_reblog_insert.rb

@@ -1,72 +0,0 @@
-# frozen_string_literal: true
-
-module StatusSafeReblogInsert
-  extend ActiveSupport::Concern
-
-  class_methods do
-    # This patch overwrites the built-in ActiveRecord `_insert_record` method to
-    # ensure that no reblogs of discarded statuses are created, as this cannot be
-    # enforced through DB constraints the same way as reblogs of deleted statuses
-    #
-    # We redefine the internal method responsible for issuing the `INSERT`
-    # statement and replace the `INSERT INTO ... VALUES ...` query with an `INSERT
-    # INTO ... SELECT ...` query with a `WHERE deleted_at IS NULL` clause on the
-    # reblogged status to ensure consistency at the database level.
-    #
-    # The code is kept similar to ActiveRecord::Persistence code and calls it
-    # directly when we are not handling a reblog.
-    def _insert_record(values, returning)
-      return super unless values.is_a?(Hash) && values['reblog_of_id']&.value.present?
-
-      primary_key = self.primary_key
-      primary_key_value = nil
-
-      if prefetch_primary_key? && primary_key
-        values[primary_key] ||= begin
-          primary_key_value = next_sequence_value
-          _default_attributes[primary_key].with_cast_value(primary_key_value)
-        end
-      end
-
-      # The following line departs from stock ActiveRecord
-      # Original code was:
-      # im.insert(values.transform_keys { |name| arel_table[name] })
-      # Instead, we use a custom builder when a reblog is happening:
-      im = _compile_reblog_insert(values)
-
-      connection.insert(im, "#{self} Create", primary_key || false, primary_key_value, returning: returning).tap do |result|
-        # Since we are using SELECT instead of VALUES, a non-error `nil` return is possible.
-        # For our purposes, it's equivalent to a foreign key constraint violation
-        raise ActiveRecord::InvalidForeignKey, "(reblog_of_id)=(#{values['reblog_of_id'].value}) is not present in table \"statuses\"" if result.nil?
-      end
-    end
-
-    def _compile_reblog_insert(values)
-      # This is somewhat equivalent to the following code of ActiveRecord::Persistence:
-      # `arel_table.compile_insert(_substitute_values(values))`
-      # The main difference is that we use a `SELECT` instead of a `VALUES` clause,
-      # which means we have to build the `SELECT` clause ourselves and do a bit more
-      # manual work.
-
-      # Instead of using Arel::InsertManager#values, we are going to use Arel::InsertManager#select
-      im = Arel::InsertManager.new
-      im.into(arel_table)
-
-      binds = []
-      reblog_bind = nil
-      values.each do |name, attribute|
-        attr = arel_table[name]
-        bind = predicate_builder.build_bind_attribute(attr.name, attribute.value)
-
-        im.columns << attr
-        binds << bind
-
-        reblog_bind = bind if name == 'reblog_of_id'
-      end
-
-      im.select(arel_table.where(arel_table[:id].eq(reblog_bind)).where(arel_table[:deleted_at].eq(nil)).project(*binds))
-
-      im
-    end
-  end
-end