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beginning of osm on rails

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0 parents commit 06f3473d1c64d2e0a1ecc6f1a9c4679a52bc4761 @SteveC SteveC committed Jul 28, 2006
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+== Welcome to Rails
+Rails is a web-application and persistence framework that includes everything
+needed to create database-backed web-applications according to the
+Model-View-Control pattern of separation. This pattern splits the view (also
+called the presentation) into "dumb" templates that are primarily responsible
+for inserting pre-built data in between HTML tags. The model contains the
+"smart" domain objects (such as Account, Product, Person, Post) that holds all
+the business logic and knows how to persist themselves to a database. The
+controller handles the incoming requests (such as Save New Account, Update
+Product, Show Post) by manipulating the model and directing data to the view.
+In Rails, the model is handled by what's called an object-relational mapping
+layer entitled Active Record. This layer allows you to present the data from
+database rows as objects and embellish these data objects with business logic
+methods. You can read more about Active Record in
+The controller and view are handled by the Action Pack, which handles both
+layers by its two parts: Action View and Action Controller. These two layers
+are bundled in a single package due to their heavy interdependence. This is
+unlike the relationship between the Active Record and Action Pack that is much
+more separate. Each of these packages can be used independently outside of
+Rails. You can read more about Action Pack in
+== Getting started
+1. Start the web server: <tt>ruby script/server</tt> (run with --help for options)
+2. Go to http://localhost:3000/ and get "Welcome aboard: You’re riding the Rails!"
+3. Follow the guidelines to start developing your application
+== Web servers
+Rails uses the built-in web server in Ruby called WEBrick by default, so you don't
+have to install or configure anything to play around.
+If you have lighttpd installed, though, it'll be used instead when running script/server.
+It's considerably faster than WEBrick and suited for production use, but requires additional
+installation and currently only works well on OS X/Unix (Windows users are encouraged
+to start with WEBrick). We recommend version 1.4.11 and higher. You can download it from
+If you want something that's halfway between WEBrick and lighttpd, we heartily recommend
+Mongrel. It's a Ruby-based web server with a C-component (so it requires compilation) that
+also works very well with Windows. See more at
+But of course its also possible to run Rails with the premiere open source web server Apache.
+To get decent performance, though, you'll need to install FastCGI. For Apache 1.3, you want
+to use mod_fastcgi. For Apache 2.0+, you want to use mod_fcgid.
+See for more information on FastCGI.
+== Example for Apache conf
+ <VirtualHost *:80>
+ ServerName rails
+ DocumentRoot /path/application/public/
+ ErrorLog /path/application/log/server.log
+ <Directory /path/application/public/>
+ Options ExecCGI FollowSymLinks
+ AllowOverride all
+ Allow from all
+ Order allow,deny
+ </Directory>
+ </VirtualHost>
+NOTE: Be sure that CGIs can be executed in that directory as well. So ExecCGI
+should be on and ".cgi" should respond. All requests from go
+through CGI, so no Apache restart is necessary for changes. All other requests
+go through FCGI (or mod_ruby), which requires a restart to show changes.
+== Debugging Rails
+Have "tail -f" commands running on both the server.log, production.log, and
+test.log files. Rails will automatically display debugging and runtime
+information to these files. Debugging info will also be shown in the browser
+on requests from
+== Breakpoints
+Breakpoint support is available through the script/breakpointer client. This
+means that you can break out of execution at any point in the code, investigate
+and change the model, AND then resume execution! Example:
+ class WeblogController < ActionController::Base
+ def index
+ @posts = Post.find_all
+ breakpoint "Breaking out from the list"
+ end
+ end
+So the controller will accept the action, run the first line, then present you
+with a IRB prompt in the breakpointer window. Here you can do things like:
+Executing breakpoint "Breaking out from the list" at .../webrick_server.rb:16 in 'breakpoint'
+ >> @posts.inspect
+ => "[#<Post:0x14a6be8 @attributes={\"title\"=>nil, \"body\"=>nil, \"id\"=>\"1\"}>,
+ #<Post:0x14a6620 @attributes={\"title\"=>\"Rails you know!\", \"body\"=>\"Only ten..\", \"id\"=>\"2\"}>]"
+ >> @posts.first.title = "hello from a breakpoint"
+ => "hello from a breakpoint"
+...and even better is that you can examine how your runtime objects actually work:
+ >> f = @posts.first
+ => #<Post:0x13630c4 @attributes={"title"=>nil, "body"=>nil, "id"=>"1"}>
+ >> f.
+ Display all 152 possibilities? (y or n)
+Finally, when you're ready to resume execution, you press CTRL-D
+== Console
+You can interact with the domain model by starting the console through script/console.
+Here you'll have all parts of the application configured, just like it is when the
+application is running. You can inspect domain models, change values, and save to the
+database. Starting the script without arguments will launch it in the development environment.
+Passing an argument will specify a different environment, like <tt>script/console production</tt>.
+== Description of contents
+ Holds all the code that's specific to this particular application.
+ Holds controllers that should be named like weblog_controller.rb for
+ automated URL mapping. All controllers should descend from
+ ActionController::Base.
+ Holds models that should be named like post.rb.
+ Most models will descend from ActiveRecord::Base.
+ Holds the template files for the view that should be named like
+ weblog/index.rhtml for the WeblogController#index action. All views use eRuby
+ syntax. This directory can also be used to keep stylesheets, images, and so on
+ that can be symlinked to public.
+ Holds view helpers that should be named like weblog_helper.rb.
+ Holds API classes for web services.
+ Configuration files for the Rails environment, the routing map, the database, and other dependencies.
+ Self-contained mini-applications that can bundle together controllers, models, and views.
+ Contains the database schema in schema.rb. db/migrate contains all
+ the sequence of Migrations for your schema.
+ Application specific libraries. Basically, any kind of custom code that doesn't
+ belong under controllers, models, or helpers. This directory is in the load path.
+ The directory available for the web server. Contains subdirectories for images, stylesheets,
+ and javascripts. Also contains the dispatchers and the default HTML files.
+ Helper scripts for automation and generation.
+ Unit and functional tests along with fixtures.
+ External libraries that the application depends on. Also includes the plugins subdirectory.
+ This directory is in the load path.
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+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+require(File.join(File.dirname(__FILE__), 'config', 'boot'))
+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+require 'tasks/rails'
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+you want to
+$ su
+# mysqladmin create openstreetmap
+# mysql
+> grant all privileges on openstreetmap.* to 'openstreetmap'@'localhost' identified by 'openstreetmap';
+> exit
+# exit
+$ mysql openstreetmap -u openstreetmap -p < db/create_database.sql
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