fill in other collection methods on ec2 models

lib/fog/aws/models/ec2/instances.rb

@@ -8,9 +8,14 @@ module Fog
 
       class Instances < Fog::Collection
 
+        attribute :instance_id
+
         def all(instance_id = [])
           data = connection.describe_instances(instance_id)
-          instances = Fog::AWS::EC2::Instances.new(:connection => connection)
+          instances = Fog::AWS::EC2::Instances.new(
+            :connection   => connection,
+            :instance_id  => instance_id
+          )
           data['instancesSet'].each do |instance|
             instances << Fog::AWS::EC2::Instances.new({
               :connection => connection,
@@ -26,6 +31,12 @@ module Fog
           instance
         end
 
+        def get(instance_id)
+          all(instance_id).first
+        rescue Fog::Errors::BadRequest
+          nil
+        end
+
         def new(attributes = {})
           Fog::AWS::EC2::Instance.new(
             attributes.merge!(
@@ -35,6 +46,10 @@ module Fog
           )
         end
 
+        def reload
+          all(instance_id)
+        end
+
       end
 
     end

lib/fog/aws/models/ec2/key_pairs.rb

@@ -8,9 +8,14 @@ module Fog
 
       class KeyPairs < Fog::Collection
 
+        attribute :key_name
+
         def all(key_name = [])
           data = connection.describe_key_pairs(key_name).body
-          key_pairs = Fog::AWS::EC2::KeyPairs.new(:connection => connection)
+          key_pairs = Fog::AWS::EC2::KeyPairs.new(
+            :connection => connection,
+            :key_name   => key_name
+          )
           data['keySet'].each do |key|
             key_pairs << Fog::AWS::EC2::KeyPair.new({
               :connection => connection,
@@ -26,6 +31,12 @@ module Fog
           bucket
         end
 
+        def get(key_name)
+          all(key_name).first
+        rescue Fog::Errors::BadRequest
+          nil
+        end
+
         def new(attributes = {})
           Fog::AWS::EC2::KeyPair.new(
             attributes.merge!(
@@ -35,6 +46,10 @@ module Fog
           )
         end
 
+        def reload
+          all(key_name)
+        end
+
       end
 
     end

lib/fog/aws/models/ec2/security_groups.rb

@@ -8,9 +8,14 @@ module Fog
 
       class SecurityGroups < Fog::Collection
 
+        attribute :group_name
+
         def all(group_name = [])
           data = connection.describe_security_groups(group_name)
-          security_groups = Fog::AWS::EC2::SecurityGroups.new(:connection => connection)
+          security_groups = Fog::AWS::EC2::SecurityGroups.new(
+            :connection => connection,
+            :group_name => group_name
+          )
           data['securityGroupInfo'].each do |security_group|
             security_groups << Fog::AWS::EC2::SecurityGroup.new({
               :connection       => connection,
@@ -26,6 +31,12 @@ module Fog
           security_group
         end
 
+        def get(group_name)
+          all(group_name).first
+        rescue Fog::Errors::BadRequest
+          nil
+        end
+
         def new(attributes = {})
           Fog::AWS::EC2::SecurityGroup.new(
             attributes.merge!(
@@ -35,6 +46,10 @@ module Fog
           )
         end
 
+        def reload
+          all(group_name)
+        end
+
       end
 
     end