Merge branch 'master' into adequaterecord

* master: (26 commits)
  Avoid URI parsing
  Add missing require so requiring `active_support/cache` works again.
  depend_on_asset is not required anymore on sprockets-rails 2.1.2
  upgrading section for 4.1 is no longer WIP. [ci skip]
  Expand explanation of how to set secrets.yml. [ci skip]
  Guides: minor typo fixed [ci skip]
  Fixed problem where `1.day.eql?(1.day)` is false
  new CHANGELOGs entries are in the top [ci skip]
  Updates the maintenance policy with new Rails versions
  Dont abbreviate that which needs no abbreviation
  Dont encourage aliases now that we have variants
  Use short-form for the scaffold render calls and drop the needless test
  Drop in @jeremy's new database.yml template text
  Don't deprecate after all
  Less ambition, more deprecation
  Ensure we correctly and immediately load all ENV entries
  Give a deprecation message even when the lookup fails
  Rearrange the config merger some more
  entry is always a Hash
  Check env_url only once
  ...

Conflicts:
	Gemfile

4 files changed, 16 insertions, 36 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/connection_specification.rb b/activerecord/lib/active_record/connection_adapters/connection_specification.rb
index e0715f7ce9..a8ab52be74 100644
--- a/activerecord/lib/active_record/connection_adapters/connection_specification.rb
+++ b/activerecord/lib/active_record/connection_adapters/connection_specification.rb
@@ -33,7 +33,7 @@ module ActiveRecord
         def initialize(url)
           raise "Database URL cannot be empty" if url.blank?
           @uri     = URI.parse(url)
-          @adapter = @uri.scheme
+          @adapter = @uri.scheme.gsub('-', '_')
           @adapter = "postgresql" if @adapter == "postgres"
 
           if @uri.opaque
@@ -220,10 +220,10 @@ module ActiveRecord
           # an environment key or a URL spec, so we have deprecated
           # this ambiguous behaviour and in the future this function
           # can be removed in favor of resolve_url_connection.
-          if configurations.key?(spec)
+          if configurations.key?(spec) || spec !~ /:/
             ActiveSupport::Deprecation.warn "Passing a string to ActiveRecord::Base.establish_connection " \
               "for a configuration lookup is deprecated, please pass a symbol (#{spec.to_sym.inspect}) instead"
-            resolve_connection(configurations[spec])
+            resolve_symbol_connection(spec)
           else
             resolve_url_connection(spec)
           end
diff --git a/activerecord/lib/active_record/connection_handling.rb b/activerecord/lib/active_record/connection_handling.rb
index bbb866cedf..31e7390bf7 100644
--- a/activerecord/lib/active_record/connection_handling.rb
+++ b/activerecord/lib/active_record/connection_handling.rb
@@ -58,9 +58,9 @@ module ActiveRecord
     end
 
     class MergeAndResolveDefaultUrlConfig # :nodoc:
-      def initialize(raw_configurations, url = ENV['DATABASE_URL'])
+      def initialize(raw_configurations)
         @raw_config = raw_configurations.dup
-        @url        = url
+        @env = DEFAULT_ENV.call.to_s
       end
 
       # Returns fully resolved connection hashes.
@@ -71,33 +71,10 @@ module ActiveRecord
 
       private
         def config
-          if @url
-            raw_merged_into_default
-          else
-            @raw_config
-          end
-        end
-
-        def raw_merged_into_default
-          default = default_url_hash
-
-          @raw_config.each do |env, values|
-            default[env] = values || {}
-            default[env].merge!("url" => @url) { |h, v1, v2| v1 || v2 } if default[env].is_a?(Hash)
-          end
-          default
-        end
-
-        # When the raw configuration is not present and ENV['DATABASE_URL']
-        # is available we return a hash with the connection information in
-        # the connection URL. This hash responds to any string key with
-        # resolved connection information.
-        def default_url_hash
-          Hash.new do |hash, key|
-            hash[key] = if key.is_a? String
-               ActiveRecord::ConnectionAdapters::ConnectionSpecification::ConnectionUrlResolver.new(@url).to_hash
-            else
-              nil
+          @raw_config.dup.tap do |cfg|
+            if url = ENV['DATABASE_URL']
+              cfg[@env] ||= {}
+              cfg[@env]["url"] ||= url
             end
           end
         end
diff --git a/activerecord/lib/active_record/enum.rb b/activerecord/lib/active_record/enum.rb
index 167f8b7a49..18f1ca26de 100644
--- a/activerecord/lib/active_record/enum.rb
+++ b/activerecord/lib/active_record/enum.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/deep_dup'
+
 module ActiveRecord
   # Declare an enum attribute where the values map to integers in the database,
   # but can be queried by name. Example:
@@ -70,8 +72,9 @@ module ActiveRecord
       base.defined_enums = {}
     end
 
-    def enum_mapping_for(attr_name) # :nodoc:
-      defined_enums[attr_name.to_s]
+    def inherited(base)
+      base.defined_enums = defined_enums.deep_dup
+      super
     end
 
     def enum(definitions)
@@ -136,7 +139,7 @@ module ActiveRecord
           mod = Module.new do
             private
               def save_changed_attribute(attr_name, value)
-                if (mapping = self.class.enum_mapping_for(attr_name))
+                if (mapping = self.class.defined_enums[attr_name.to_s])
                   if attribute_changed?(attr_name)
                     old = changed_attributes[attr_name]
 
diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb
index 71c71cb4b1..ee080451a9 100644
--- a/activerecord/lib/active_record/validations/uniqueness.rb
+++ b/activerecord/lib/active_record/validations/uniqueness.rb
@@ -93,7 +93,7 @@ module ActiveRecord
       end
 
       def map_enum_attribute(klass, attribute, value)
-        mapping = klass.enum_mapping_for(attribute.to_s)
+        mapping = klass.defined_enums[attribute.to_s]
         value = mapping[value] if value && mapping
         value
       end