{"action":"created","comment":{"url":"https://api.github.com/repos/Coursemology/coursemology2/pulls/comments/64372010","id":64372010,"diff_hunk":"@@ -1,32 +1,120 @@\n # frozen_string_literal: true\n module Extensions::Attachable::ActiveRecord::Base\n   module ClassMethods\n-    # This function should be declared in model, to it have attachments.\n-    def has_many_attachments # rubocop:disable Style/PredicateName\n+    # This method should be declared in model, to let it have attachments.\n+    #\n+    # @param [Hash] options\n+    # @option options [Symbol|Array<Symbol>] :on The column which is associated with attachments,\n+    #   the column type should be string or text.\n+    #   This can be a symbol or an array of symbols.\n+    #   An attribute named `column_name_attachment_references` will be defined, you can override it\n+    #   to customise the way to retrieve the attachment_references for the specific column.\n+    # @example Has many attachments on a column\n+    #   has_many_attachments on: :description #=> description is associated with the attachments\n+    #   of the model, updating description will result in attachments changing.\n+    def has_many_attachments(options = {}) # rubocop:disable Style/PredicateName\n+      class_attribute :attachable_columns","path":"lib/extensions/attachable/active_record/base.rb","position":18,"original_position":18,"commit_id":"dc30bd6c9cadc251633971b5b5a9d0a3c3575d99","original_commit_id":"dc30bd6c9cadc251633971b5b5a9d0a3c3575d99","user":{"login":"lowjoel","id":2505070,"avatar_url":"https://avatars.githubusercontent.com/u/2505070?v=3","gravatar_id":"","url":"https://api.github.com/users/lowjoel","html_url":"https://github.com/lowjoel","followers_url":"https://api.github.com/users/lowjoel/followers","following_url":"https://api.github.com/users/lowjoel/following{/other_user}","gists_url":"https://api.github.com/users/lowjoel/gists{/gist_id}","starred_url":"https://api.github.com/users/lowjoel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lowjoel/subscriptions","organizations_url":"https://api.github.com/users/lowjoel/orgs","repos_url":"https://api.github.com/users/lowjoel/repos","events_url":"https://api.github.com/users/lowjoel/events{/privacy}","received_events_url":"https://api.github.com/users/lowjoel/received_events","type":"User","site_admin":false},"body":"should these things be part of the included callback block below instead?","created_at":"2016-05-24T11:16:00Z","updated_at":"2016-05-24T11:16:00Z","html_url":"https://github.com/Coursemology/coursemology2/pull/1039#discussion_r64372010","pull_request_url":"https://api.github.com/repos/Coursemology/coursemology2/pulls/1039","_links":{"self":{"href":"https://api.github.com/repos/Coursemology/coursemology2/pulls/comments/64372010"},"html":{"href":"https://github.com/Coursemology/coursemology2/pull/1039#discussion_r64372010"},"pull_request":{"href":"https://api.github.com/repos/Coursemology/coursemology2/pulls/1039"}}},"pull_request":{"url":"https://api.github.com/repos/Coursemology/coursemology2/pulls/1039","id":68390788,"html_url":"https://github.com/Coursemology/coursemology2/pull/1039","diff_url":"https://github.com/Coursemology/coursemology2/pull/1039.diff","patch_url":"https://github.com/Coursemology/coursemology2/pull/1039.patch","issue_url":"https://api.github.com/repos/Coursemology/coursemology2/issues/1039","number":1039,"state":"open","locked":false,"title":"Allow client code to specify callbacks to update attachments after content changed","user":{"login":"allenwq","id":4983239,"avatar_url":"https://avatars.githubusercontent.com/u/4983239?v=3","gravatar_id":"","url":"https://api.github.com/users/allenwq","html_url":"https://github.com/allenwq","followers_url":"https://api.github.com/users/allenwq/followers","following_url":"https://api.github.com/users/allenwq/following{/other_user}","gists_url":"https://api.github.com/users/allenwq/gists{/gist_id}","starred_url":"https://api.github.com/users/allenwq/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/allenwq/subscriptions","organizations_url":"https://api.github.com/users/allenwq/orgs","repos_url":"https://api.github.com/users/allenwq/repos","events_url":"https://api.github.com/users/allenwq/events{/privacy}","received_events_url":"https://api.github.com/users/allenwq/received_events","type":"User","site_admin":false},"body":"This implements #1025 \r\n\r\nAdded a option to the attachable api #has_many_attachments to specify the column associated with the attachments.\r\n\r\ne.g. If client code says `has_many_attachments  on: :content`, the attachment_references will change after content changing. 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