Added new Base.find API and deprecated find_all, find_first. Added preliminary support for eager loading of associations

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1077 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 41 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/deprecated_finders.rb b/activerecord/lib/active_record/deprecated_finders.rb
new file mode 100644
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+++ b/activerecord/lib/active_record/deprecated_finders.rb
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+module ActiveRecord
+  class Base # :nodoc:
+    class << self
+      # This method is deprecated in favor of find with the :conditions option.
+      #
+      # Works like find, but the record matching +id+ must also meet the +conditions+.
+      # +RecordNotFound+ is raised if no record can be found matching the +id+ or meeting the condition.
+      # Example:
+      #   Person.find_on_conditions 5, "first_name LIKE '%dav%' AND last_name = 'heinemeier'"
+      def find_on_conditions(ids, conditions)
+        find(ids, :conditions => conditions)
+      end
+
+      # This method is deprecated in favor of find(:first, options).
+      #
+      # Returns the object for the first record responding to the conditions in +conditions+, 
+      # such as "group = 'master'". If more than one record is returned from the query, it's the first that'll
+      # be used to create the object. In such cases, it might be beneficial to also specify 
+      # +orderings+, like "income DESC, name", to control exactly which record is to be used. Example: 
+      #   Employee.find_first "income > 50000", "income DESC, name"
+      def find_first(conditions = nil, orderings = nil, joins = nil)
+        find(:first, :conditions => conditions, :order => orderings, :joins => joins)
+      end
+
+      # This method is deprecated in favor of find(:all, options).
+      #
+      # Returns an array of all the objects that could be instantiated from the associated
+      # table in the database. The +conditions+ can be used to narrow the selection of objects (WHERE-part),
+      # such as by "color = 'red'", and arrangement of the selection can be done through +orderings+ (ORDER BY-part),
+      # such as by "last_name, first_name DESC". A maximum of returned objects and their offset can be specified in 
+      # +limit+ with either just a single integer as the limit or as an array with the first element as the limit, 
+      # the second as the offset. Examples:
+      #   Project.find_all "category = 'accounts'", "last_accessed DESC", 15
+      #   Project.find_all ["category = ?", category_name], "created ASC", [15, 20]
+      def find_all(conditions = nil, orderings = nil, limit = nil, joins = nil)
+        limit, offset = limit.is_a?(Array) ? limit : [ limit, nil ]
+        find(:all, { :conditions => conditions, :order => orderings, :joins => joins, :limit => limit, :offset => offset})
+      end
+    end
+  end
+end
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