307 lines
10 KiB
Ruby
307 lines
10 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module ImportExport
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class BaseRelationFactory
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include Gitlab::Utils::StrongMemoize
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IMPORTED_OBJECT_MAX_RETRIES = 5.freeze
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OVERRIDES = {}.freeze
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EXISTING_OBJECT_RELATIONS = %i[].freeze
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# This represents all relations that have unique key on `project_id` or `group_id`
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UNIQUE_RELATIONS = %i[].freeze
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USER_REFERENCES = %w[
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author_id
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assignee_id
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updated_by_id
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merged_by_id
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latest_closed_by_id
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user_id
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created_by_id
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last_edited_by_id
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merge_user_id
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resolved_by_id
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closed_by_id
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owner_id
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].freeze
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TOKEN_RESET_MODELS = %i[Project Namespace Group Ci::Trigger Ci::Build Ci::Runner ProjectHook].freeze
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def self.create(*args)
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new(*args).create
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end
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def self.relation_class(relation_name)
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# There are scenarios where the model is pluralized (e.g.
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# MergeRequest::Metrics), and we don't want to force it to singular
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# with #classify.
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relation_name.to_s.classify.constantize
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rescue NameError
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relation_name.to_s.constantize
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end
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def initialize(relation_sym:, relation_hash:, members_mapper:, object_builder:, user:, importable:, excluded_keys: [])
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@relation_name = self.class.overrides[relation_sym]&.to_sym || relation_sym
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@relation_hash = relation_hash.except('noteable_id')
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@members_mapper = members_mapper
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@object_builder = object_builder
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@user = user
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@importable = importable
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@imported_object_retries = 0
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@relation_hash[importable_column_name] = @importable.id
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# Remove excluded keys from relation_hash
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# We don't do this in the parsed_relation_hash because of the 'transformed attributes'
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# For example, MergeRequestDiffFiles exports its diff attribute as utf8_diff. Then,
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# in the create method that attribute is renamed to diff. And because diff is an excluded key,
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# if we clean the excluded keys in the parsed_relation_hash, it will be removed
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# from the object attributes and the export will fail.
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@relation_hash.except!(*excluded_keys)
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end
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# Creates an object from an actual model with name "relation_sym" with params from
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# the relation_hash, updating references with new object IDs, mapping users using
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# the "members_mapper" object, also updating notes if required.
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def create
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return if invalid_relation?
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setup_base_models
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setup_models
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generate_imported_object
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end
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def self.overrides
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self::OVERRIDES
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end
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def self.existing_object_relations
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self::EXISTING_OBJECT_RELATIONS
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end
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private
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def invalid_relation?
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false
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end
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def setup_models
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raise NotImplementedError
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end
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def unique_relations
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# define in sub-class if any
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self.class::UNIQUE_RELATIONS
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end
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def setup_base_models
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update_user_references
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remove_duplicate_assignees
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reset_tokens!
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remove_encrypted_attributes!
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end
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def update_user_references
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self.class::USER_REFERENCES.each do |reference|
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if @relation_hash[reference]
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@relation_hash[reference] = @members_mapper.map[@relation_hash[reference]]
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end
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end
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end
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def remove_duplicate_assignees
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return unless @relation_hash['issue_assignees']
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# When an assignee did not exist in the members mapper, the importer is
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# assigned. We only need to assign each user once.
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@relation_hash['issue_assignees'].uniq!(&:user_id)
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end
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def generate_imported_object
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imported_object
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end
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def reset_tokens!
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return unless Gitlab::ImportExport.reset_tokens? && self.class::TOKEN_RESET_MODELS.include?(@relation_name)
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# If we import/export to the same instance, tokens will have to be reset.
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# We also have to reset them to avoid issues when the gitlab secrets file cannot be copied across.
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relation_class.attribute_names.select { |name| name.include?('token') }.each do |token|
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@relation_hash[token] = nil
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end
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end
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def remove_encrypted_attributes!
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return unless relation_class.respond_to?(:encrypted_attributes) && relation_class.encrypted_attributes.any?
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relation_class.encrypted_attributes.each_key do |key|
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@relation_hash[key.to_s] = nil
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end
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end
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def relation_class
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@relation_class ||= self.class.relation_class(@relation_name)
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end
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def importable_column_name
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importable_class_name.concat('_id')
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end
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def importable_class_name
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@importable.class.to_s.downcase
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end
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def imported_object
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if existing_or_new_object.respond_to?(:importing)
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existing_or_new_object.importing = true
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end
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existing_or_new_object
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rescue ActiveRecord::RecordNotUnique
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# as the operation is not atomic, retry in the unlikely scenario an INSERT is
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# performed on the same object between the SELECT and the INSERT
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@imported_object_retries += 1
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retry if @imported_object_retries < IMPORTED_OBJECT_MAX_RETRIES
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end
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def parsed_relation_hash
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@parsed_relation_hash ||= Gitlab::ImportExport::AttributeCleaner.clean(relation_hash: @relation_hash,
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relation_class: relation_class)
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end
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def existing_or_new_object
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# Only find existing records to avoid mapping tables such as milestones
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# Otherwise always create the record, skipping the extra SELECT clause.
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@existing_or_new_object ||= begin
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if existing_object?
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attribute_hash = attribute_hash_for(['events'])
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existing_object.assign_attributes(attribute_hash) if attribute_hash.any?
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existing_object
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else
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# Because of single-type inheritance, we need to be careful to use the `type` field
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# See https://gitlab.com/gitlab-org/gitlab/issues/34860#note_235321497
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inheritance_column = relation_class.try(:inheritance_column)
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inheritance_attributes = parsed_relation_hash.slice(inheritance_column)
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object = relation_class.new(inheritance_attributes)
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object.assign_attributes(parsed_relation_hash)
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object
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end
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end
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end
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def attribute_hash_for(attributes)
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attributes.each_with_object({}) do |hash, value|
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hash[value] = parsed_relation_hash.delete(value) if parsed_relation_hash[value]
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hash
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end
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end
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def existing_object
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@existing_object ||= find_or_create_object!
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end
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def unique_relation_object
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unique_relation_object = relation_class.find_or_create_by(importable_column_name => @importable.id)
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unique_relation_object.assign_attributes(parsed_relation_hash)
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unique_relation_object
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end
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def find_or_create_object!
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return unique_relation_object if unique_relation?
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# Can't use IDs as validation exists calling `group` or `project` attributes
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finder_hash = parsed_relation_hash.tap do |hash|
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if relation_class.attribute_method?('group_id') && @importable.is_a?(Project)
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hash['group'] = @importable.group
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end
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hash[importable_class_name] = @importable if relation_class.reflect_on_association(importable_class_name.to_sym)
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hash.delete(importable_column_name)
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end
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@object_builder.build(relation_class, finder_hash)
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end
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def setup_note
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set_note_author
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# attachment is deprecated and note uploads are handled by Markdown uploader
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@relation_hash['attachment'] = nil
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end
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# Sets the author for a note. If the user importing the project
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# has admin access, an actual mapping with new project members
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# will be used. Otherwise, a note stating the original author name
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# is left.
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def set_note_author
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old_author_id = @relation_hash['author_id']
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author = @relation_hash.delete('author')
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update_note_for_missing_author(author['name']) unless has_author?(old_author_id)
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end
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def has_author?(old_author_id)
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admin_user? && @members_mapper.include?(old_author_id)
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end
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def missing_author_note(updated_at, author_name)
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timestamp = updated_at.split('.').first
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"\n\n *By #{author_name} on #{timestamp} (imported from GitLab project)*"
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end
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def update_note_for_missing_author(author_name)
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@relation_hash['note'] = '*Blank note*' if @relation_hash['note'].blank?
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@relation_hash['note'] = "#{@relation_hash['note']}#{missing_author_note(@relation_hash['updated_at'], author_name)}"
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end
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def admin_user?
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@user.admin?
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end
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def existing_object?
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strong_memoize(:_existing_object) do
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self.class.existing_object_relations.include?(@relation_name) || unique_relation?
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end
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end
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def unique_relation?
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strong_memoize(:unique_relation) do
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importable_foreign_key.present? &&
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(has_unique_index_on_importable_fk? || uses_importable_fk_as_primary_key?)
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end
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end
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def has_unique_index_on_importable_fk?
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cache = cached_has_unique_index_on_importable_fk
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table_name = relation_class.table_name
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return cache[table_name] if cache.has_key?(table_name)
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index_exists =
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ActiveRecord::Base.connection.index_exists?(
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relation_class.table_name,
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importable_foreign_key,
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unique: true)
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cache[table_name] = index_exists
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end
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# Avoid unnecessary DB requests
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def cached_has_unique_index_on_importable_fk
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Thread.current[:cached_has_unique_index_on_importable_fk] ||= {}
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end
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def uses_importable_fk_as_primary_key?
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relation_class.primary_key == importable_foreign_key
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end
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def importable_foreign_key
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relation_class.reflect_on_association(importable_class_name.to_sym)&.foreign_key
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end
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end
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end
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end
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