Krzywda - Fearless Refactoring Rails Controllers
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This book is for sale at http://leanpub.com/railsrefactoringtest
This version was published on 2017-01-26
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This is a Leanpub book. Leanpub empowers authors and publishers with the Lean Publishing process. Lean Publishing is the act of publishing an in-progress ebook using lightweight tools and many iterations to get reader feedback, pivot until you have the right book and build traction once you do.
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Also by Andrzej Krzywda and Arkency
- Rails meets React.js
- Responsible Rails
- React.js by Example
- Blogging for busy programmers
- Developers Oriented Project Management
At the beginning they all start simple, as the one scaffolded with a generator:
1defcreate2@issue=Issue.new(issue_params)34respond_todo|format|5if@issue.save6format.html{redirect_to@issue,notice:Success.}7format.json{renderaction:'show',status::created,location:@issue}8else9format.html{renderaction:'new'}10format.json{renderjson:@issue.errors,status::unprocessable_entity}11end12end13endFor some resources the controllers and actions stay simple. In some of them, though, they start to grow. Its not unusual to see actions like this one:
1classIssuesController<ApplicationController2default_search_scope:issues34before_filter:find_issue,:only=>[:show,:edit,:update]5before_filter:find_issues,:only=>[:bulk_edit,:bulk_update,:destroy]6before_filter:find_project,:only=>[:new,:create,:update_form]7before_filter:authorize,:except=>[:index]8before_filter:find_optional_project,:only=>[:index]9before_filter:check_for_default_issue_status,:only=>[:new,:create]10before_filter:build_new_issue_from_params,:only=>[:new,:create,:update_form]11accept_rss_auth:index,:show12accept_api_auth:index,:show,:create,:update,:destroy1314rescue_fromQuery::StatementInvalid,:with=>:query_statement_invalid1516defbulk_update17@issues.sort!18@copy=params[:copy].present?19attributes=parse_params_for_bulk_issue_attributes(params)2021unsaved_issues=[]22saved_issues=[]2324if@copy&¶ms[:copy_subtasks].present?25# Descendant issues will be copied with the parent task26# Don't copy them twice27@issues.reject!{|issue|@issues.detect{|other|issue.is_descendant_of?(other)}}28end2930@issues.eachdo|orig_issue|31orig_issue.reload32if@copy33issue=orig_issue.copy({},34:attachments=>params[:copy_attachments].present?,35:subtasks=>params[:copy_subtasks].present?36)37else38issue=orig_issue39end40journal=issue.init_journal(User.current,params[:notes])41issue.safe_attributes=attributes42call_hook(:controller_issues_bulk_edit_before_saveFont size:
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