Merge branch 'master' of git://github.com/lifo/docrails

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -364,6 +364,13 @@ def root(options = {})
         #     match 'path' => 'c#a', :defaults => { :format => 'jpg' }
         #
         #   See <tt>Scoping#defaults</tt> for its scope equivalent.
+        #
+        # [:anchor]
+        #   Boolean to anchor a #match pattern. Default is true. When set to
+        #   false, the pattern matches any request prefixed with the given path.
+        #
+        #     # Matches any request starting with 'path'
+        #     match 'path' => 'c#a', :anchor => false
         def match(path, options=nil)
           mapping = Mapping.new(@set, @scope, path, options || {})
           app, conditions, requirements, defaults, as, anchor = mapping.to_route

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -237,7 +237,6 @@ def rollback_db_transaction() end
       #  add_limit_offset!('SELECT * FROM suppliers', {:limit => 10, :offset => 50})
       # generates
       #  SELECT * FROM suppliers LIMIT 10 OFFSET 50
-
       def add_limit_offset!(sql, options)
         if limit = options[:limit]
           sql << " LIMIT #{sanitize_limit(limit)}"

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -279,12 +279,11 @@ def change_column(table_name, column_name, type, options = {})
         raise NotImplementedError, "change_column is not implemented"
       end
 
-      # Sets a new default value for a column.  If you want to set the default
-      # value to +NULL+, you are out of luck.  You need to
-      # DatabaseStatements#execute the appropriate SQL statement yourself.
+      # Sets a new default value for a column.
       # ===== Examples
       #  change_column_default(:suppliers, :qualification, 'new')
       #  change_column_default(:accounts, :authorized, 1)
+      #  change_column_default(:users, :email, nil)
       def change_column_default(table_name, column_name, default)
         raise NotImplementedError, "change_column_default is not implemented"
       end

railties/guides/source/active_record_querying.textile

@@ -747,6 +747,22 @@ h4. Specifying Conditions on Eager Loaded Associations
 
 Even though Active Record lets you specify conditions on the eager loaded associations just like +joins+, the recommended way is to use "joins":#joining-tables instead.
 
+However if you must do this, you may use +where+ as you would normally.
+
+<ruby>
+Post.includes(:comments).where("comments.visible", true)
+</ruby>
+
+This would generate a query which contains a +LEFT OUTER JOIN+ whereas the +joins+ method would generate one using the +INNER JOIN+ function instead.
+
+<ruby>
+  SELECT "posts"."id" AS t0_r0, ... "comments"."updated_at" AS t1_r5 FROM "posts" LEFT OUTER JOIN "comments" ON "comments"."post_id" = "posts"."id" WHERE (comments.visible)
+</ruby>
+
+If there was no +where+ condition, this would generate the normal set of two queries.
+
+If, in the case of this +includes+ query, there were no comments for any posts, all the posts would still be loaded. By using +joins+ (an INNER JOIN), the join conditions *must* match, otherwise no records will be returned.
+
 h3. Scopes
 
 Scoping allows you to specify commonly-used ARel queries which can be referenced as method calls on the association objects or models. With these scopes, you can use every method previously covered such as +where+, +joins+ and +includes+. All scope methods will return an +ActiveRecord::Relation+ object which will allow for further methods (such as other scopes) to be called on it.

railties/guides/source/caching_with_rails.textile

@@ -65,7 +65,7 @@ end
 
 If you want a more complicated expiration scheme, you can use cache sweepers to expire cached objects when things change. This is covered in the section on Sweepers.
 
-Note: Page caching ignores all parameters. For example +/products?page=1+ will be written out to the filesystem as +products.html+ with no reference to the +page+ parameter. Thus, if someone requests +/products?page=2+ later, they will get the cached first page. Be careful when page caching GET parameters in the URL!
+NOTE: Page caching ignores all parameters. For example +/products?page=1+ will be written out to the filesystem as +products.html+ with no reference to the +page+ parameter. Thus, if someone requests +/products?page=2+ later, they will get the cached first page. Be careful when page caching GET parameters in the URL!
 
 INFO: Page caching runs in an after filter. Thus, invalid requests won't generate spurious cache entries as long as you halt them. Typically, a redirection in some before filter that checks request preconditions does the job.
 

railties/guides/source/contributing_to_ruby_on_rails.textile

@@ -371,7 +371,7 @@ Now create a ticket with your patch. Go to the "new ticket":http://rails.lightho
 
 h4. Get Some Feedback
 
-Now you need to get other people to look at your patch, just as you've looked at other people's patches. You can use the rubyonrails-core mailing list or the #rails-contrib channel on IRC freenode for this. You might also try just talking to Rails developers that you know.
+Now you need to get other people to look at your patch, just as you've looked at other people's patches. You can use the "rubyonrails-core mailing list":http://groups.google.com/group/rubyonrails-core/ or the #rails-contrib channel on IRC freenode for this. You might also try just talking to Rails developers that you know.
 
 h4. Iterate as Necessary
 

railties/guides/source/getting_started.textile

@@ -149,7 +149,7 @@ Usually run this as the root user:
 # gem install rails
 </shell>
 
-TIP. If you're working on Windows, you should be aware that the vast majority of Rails development is done in Unix environments. While Ruby and Rails themselves install easily using for example "Ruby Installer":http://rubyinstaller.org/, the supporting ecosystem often assumes you are able to build C-based rubygems and work in a command window. If at all possible, we suggest that you install a Linux virtual machine and use that for Rails development, instead of using Windows.
+TIP. If you're working on Windows, you can quickly install Ruby and Rails with "Rails Installer":http://railsinstaller.org.
 
 h4. Creating the Blog Application
 

railties/lib/rails/railtie/configuration.rb

@@ -31,26 +31,34 @@ def generators(&block) #:nodoc
         app_generators(&block)
       end
 
+      # First configurable block to run. Called before any initializers are run.
       def before_configuration(&block)
         ActiveSupport.on_load(:before_configuration, :yield => true, &block)
       end
 
+      # Third configurable block to run. Does not run if config.cache_classes
+      # set to false.
       def before_eager_load(&block)
         ActiveSupport.on_load(:before_eager_load, :yield => true, &block)
       end
 
+      # Second configurable block to run. Called before frameworks initialize.
       def before_initialize(&block)
         ActiveSupport.on_load(:before_initialize, :yield => true, &block)
       end
 
+      # Last configurable block to run. Called after frameworks initialize.
       def after_initialize(&block)
         ActiveSupport.on_load(:after_initialize, :yield => true, &block)
       end
 
+      # Array of callbacks defined by #to_prepare.
       def to_prepare_blocks
         @@to_prepare_blocks ||= []
       end
 
+      # Defines generic callbacks to run before #after_initialize. Useful for
+      # Rails::Railtie subclasses.
       def to_prepare(&blk)
         to_prepare_blocks << blk if blk
       end