diff --git a/lib/active_force/active_query.rb b/lib/active_force/active_query.rb
index ad00cca..cb54a7a 100644
--- a/lib/active_force/active_query.rb
+++ b/lib/active_force/active_query.rb
@@ -84,7 +84,7 @@ def select *selected_fields
     end
 
     def ids
-      clone_and_set_instance_variables(query_fields: ["Id"])
+      super.pluck(:id)
     end
 
     def find!(id)
diff --git a/lib/active_force/query.rb b/lib/active_force/query.rb
index aa0072e..fcaf35c 100644
--- a/lib/active_force/query.rb
+++ b/lib/active_force/query.rb
@@ -107,6 +107,10 @@ def sum field
       clone_and_set_instance_variables(query_fields: ["sum(#{field})"])
     end
 
+    def ids
+      clone_and_set_instance_variables(query_fields: ["Id"])
+    end
+
     protected
       def and_conditions
         "(#{@conditions.join(') AND (')})" unless @conditions.empty?
diff --git a/spec/active_force/active_query_spec.rb b/spec/active_force/active_query_spec.rb
index 763e880..f35bb2c 100644
--- a/spec/active_force/active_query_spec.rb
+++ b/spec/active_force/active_query_spec.rb
@@ -117,12 +117,6 @@ def self.decorate(records)
     end
   end
 
-  describe '#ids' do
-    it 'returns a query that selects only the Id field' do
-      expect(active_query.where(field: 123).ids.to_s).to eq "SELECT Id FROM table_name WHERE (Field__c = 123)"
-    end
-  end
-
   describe "condition mapping" do
     it "maps conditions for a .where" do
       new_query = active_query.where(field: 123)
@@ -577,4 +571,18 @@ def check_ranges(base_query, start, finish, &format_block)
       expect(active_query.first.id).to eq("0000000000AAAAABBB")
     end
   end
+
+  describe "#ids" do
+    before do
+      allow(client).to receive(:query).and_return(api_result)
+      api_result.each do |instance|
+        allow(active_query).to receive(:build).with(instance, {}).and_return(build_restforce_sobject(id: instance['Id']))
+      end
+    end
+
+    it "should return an array of id strings" do
+      expect(active_query.ids).to be_a Array
+      expect(active_query.ids).to eq api_result.map { |r| r['Id'] }
+    end
+  end
 end
diff --git a/spec/active_force/query_spec.rb b/spec/active_force/query_spec.rb
index 0345ab7..0180186 100644
--- a/spec/active_force/query_spec.rb
+++ b/spec/active_force/query_spec.rb
@@ -236,4 +236,14 @@
       expect(query.where("name = 'cool'").sum(:field1).to_s).to eq "SELECT sum(field1) FROM table_name WHERE (name = 'cool')"
     end
   end
+
+  describe ".ids" do
+    it "should return the query for selecting Id" do
+      expect(query.ids.to_s).to eq 'SELECT Id FROM table_name'
+    end
+
+    it "should work with a condition" do
+      expect(query.where("name = 'cool'").ids.to_s).to eq "SELECT Id FROM table_name WHERE (name = 'cool')"
+    end
+  end
 end