Handle passing an array of ids to find

This improves the method signature to be closer to that of `ActiveRecord::Base#find`.

The return value of find is always an array when an array is passed
as an argument. e.g.:

    User.find(1)   # => #<User id=1>
    User.find([1]) # => [#<User id=1>]

lib/her/model/orm.rb

@@ -77,23 +77,19 @@ def invalid? # {{{
       #   # Fetched via GET "/users/1"
       #
       # @example
-      #   @users = User.find(1, 2)
+      #   @users = User.find([1, 2])
       #   # Fetched via GET "/users/1" and GET "/users/2"
       def find(*ids) # {{{
         params = ids.last.is_a?(Hash) ? ids.pop : {}
-        results = ids.map do |id|
-          request_params = params.merge(
-            :_method => :get,
-            :_path => "#{build_request_path(params.merge(:id => id))}"
-          )
-          request(request_params) do |parsed_data|
+        results = ids.flatten.compact.uniq.map do |id|
+          request(params.merge(:_method => :get, :_path => "#{build_request_path(params.merge(:id => id))}")) do |parsed_data|
             new(parsed_data[:data])
           end
         end
-        if ids.length == 1
-          results.first
-        else
+        if ids.length > 1 || ids.first.kind_of?(Array)
           results
+        else
+          results.first
         end
       end # }}}
 

spec/model/orm_spec.rb

@@ -186,6 +186,21 @@ def organization=(organization)
       @users[1].id.should == 2
     end # }}}
 
+    it "handles finding by an array of ids" do
+      @users = User.find([1, 2])
+      @users.should be_kind_of(Array)
+      @users.length.should == 2
+      @users[0].id.should == 1
+      @users[1].id.should == 2
+    end
+
+    it "handles finding by an array of ids of length 1" do
+      @users = User.find([1])
+      @users.should be_kind_of(Array)
+      @users.length.should == 1
+      @users[0].id.should == 1
+    end
+
     it "handles finding with other parameters" do # {{{
       @users = User.all(:age => 42)
       @users.should be_kind_of(Array)