diff --git a/app/models/manager_refresh/save_collection/saver/base.rb b/app/models/manager_refresh/save_collection/saver/base.rb
index 946b90f260d..4e56cada7ce 100644
--- a/app/models/manager_refresh/save_collection/saver/base.rb
+++ b/app/models/manager_refresh/save_collection/saver/base.rb
@@ -37,21 +37,30 @@ def initialize(inventory_collection)
                                                 .try(:[], "sql_type")
         end
 
-        @serializable_keys = @model_class.attribute_names.each_with_object({}) do |key, obj|
+        @serializable_keys = {}
+        @deserializable_keys = {}
+        @model_class.attribute_names.each do |key|
           attribute_type = @model_class.type_for_attribute(key.to_s)
           pg_type        = @pg_types[key.to_sym]
 
           if inventory_collection.use_ar_object?
             # When using AR object, lets make sure we type.serialize(value) every value, so we have a slow but always
             # working way driven by a configuration
-            obj[key.to_sym] = attribute_type
+            @serializable_keys[key.to_sym] = attribute_type
+            @deserializable_keys[key.to_sym] = attribute_type
           elsif attribute_type.respond_to?(:coder) ||
                 attribute_type.type == :int4range ||
                 pg_type == "text[]" ||
                 pg_type == "character varying[]"
             # Identify columns that needs to be encoded by type.serialize(value), it's a costy operations so lets do
             # do it only for columns we need it for.
-            obj[key.to_sym] = attribute_type
+            # TODO: should these set @deserializable_keys too?
+            @serializable_keys[key.to_sym] = attribute_type
+          elsif attribute_type.type == :decimal
+            # Postgres formats decimal columns with fixed number of digits e.g. '0.100'
+            # Need to parse and let Ruby format the value to have a comparable string.
+            @serializable_keys[key.to_sym] = attribute_type
+            @deserializable_keys[key.to_sym] = attribute_type
           end
         end
       end
@@ -85,7 +94,7 @@ def values_for_database!(all_attribute_keys, attributes)
 
       attr_reader :unique_index_keys, :unique_index_keys_to_s, :select_keys, :unique_db_primary_keys, :unique_db_indexes,
                   :primary_key, :arel_primary_key, :record_key_method, :pure_sql_records_fetching, :select_keys_indexes,
-                  :batch_size, :batch_size_for_persisting, :model_class, :serializable_keys, :pg_types, :table_name
+                  :batch_size, :batch_size_for_persisting, :model_class, :serializable_keys, :deserializable_keys, :pg_types, :table_name
 
       def save!(association)
         attributes_index        = {}
diff --git a/app/models/manager_refresh/save_collection/saver/concurrent_safe_batch.rb b/app/models/manager_refresh/save_collection/saver/concurrent_safe_batch.rb
index 96f92b3899c..2c98b2152a2 100644
--- a/app/models/manager_refresh/save_collection/saver/concurrent_safe_batch.rb
+++ b/app/models/manager_refresh/save_collection/saver/concurrent_safe_batch.rb
@@ -130,15 +130,20 @@ def update_or_destroy_records!(records_batch_iterator, inventory_objects_index,
 
             next unless assert_distinct_relation(primary_key_value)
 
+            # Incoming values are in SQL string form.
             # TODO(lsmola) unify this behavior with object_index_with_keys method in InventoryCollection
             # TODO(lsmola) maybe we can drop the whole pure sql fetching, since everything will be targeted refresh
             # with streaming refresh? Maybe just metrics and events will not be, but those should be upsert only
             index = unique_index_keys_to_s.map do |attribute|
+              value = record_key(record, attribute)
               if attribute == "timestamp"
+                # TODO: can this be covered by @deserializable_keys?
                 type = model_class.type_for_attribute(attribute)
-                type.cast(record_key(record, attribute)).utc.iso8601.to_s
+                type.cast(value).utc.iso8601.to_s
+              elsif (type = deserializable_keys[attribute.to_sym])
+                type.deserialize(value).to_s
               else
-                record_key(record, attribute).to_s
+                value.to_s
               end
             end.join("__")
 
@@ -303,7 +308,11 @@ def map_ids_to_inventory_objects(indexed_inventory_objects, all_attribute_keys,
           end
         elsif !supports_remote_data_timestamp?(all_attribute_keys) || result.count == batch_size_for_persisting
           result.each do |inserted_record|
-            key                 = unique_index_columns.map { |x| inserted_record[x.to_s] }
+            key = unique_index_columns.map do |x|
+              value = inserted_record[x.to_s]
+              type = deserializable_keys[x]
+              type ? type.deserialize(value) : value
+            end
             inventory_object    = indexed_inventory_objects[key]
             inventory_object.id = inserted_record[primary_key] if inventory_object
           end
diff --git a/spec/models/manager_refresh/helpers/spec_parsed_data.rb b/spec/models/manager_refresh/helpers/spec_parsed_data.rb
index fbfc7fff11f..61560855004 100644
--- a/spec/models/manager_refresh/helpers/spec_parsed_data.rb
+++ b/spec/models/manager_refresh/helpers/spec_parsed_data.rb
@@ -1,3 +1,5 @@
+require 'bigdecimal'
+
 module SpecParsedData
   def vm_data(i, data = {})
     {
@@ -100,4 +102,17 @@ def network_port_data(i, data = {})
       :mac_address           => "network_port_mac_#{i}",
     }.merge(data)
   end
+
+  def container_quota_items_data(i, data = {})
+    {
+      :quota_desired => BigDecimal("#{i}.#{i}"),
+    }.merge(data)
+  end
+
+  def container_quota_items_attrs_data(i, data = {})
+    {
+      :name          => "container_quota_items_attrs_#{i}",
+      :resource_type => "ContainerQuotaItem",
+    }.merge(data)
+  end
 end
diff --git a/spec/models/manager_refresh/save_inventory/init_data_helper.rb b/spec/models/manager_refresh/save_inventory/init_data_helper.rb
index e70b539ea86..8a6a0da40c7 100644
--- a/spec/models/manager_refresh/save_inventory/init_data_helper.rb
+++ b/spec/models/manager_refresh/save_inventory/init_data_helper.rb
@@ -56,6 +56,25 @@ def network_ports_init_data(extra_attributes = {})
     init_data(network.network_ports(extra_attributes))
   end
 
+  # Following 2 are fictional, not like this in practice.
+  def container_quota_items_init_data(extra_attributes = {})
+    init_data(extra_attributes).merge(
+      :model_class => ContainerQuotaItem,
+      :arel        => ContainerQuotaItem.all,
+      :manager_ref => [:quota_desired], # a decimal column
+    )
+  end
+
+  # Quota items don't even have custom attrs; this is just to have a dependent
+  # for quota items collection to test their .id are set correctly.
+  def container_quota_items_attrs_init_data(extra_attributes = {})
+    init_data(extra_attributes).merge(
+      :model_class => CustomAttribute,
+      :arel        => CustomAttribute.where(:resource_type => 'ContainerQuotaItem'),
+      :manager_ref => [:name],
+    )
+  end
+
   def cloud
     ManagerRefresh::InventoryCollectionDefault::CloudManager
   end
diff --git a/spec/models/manager_refresh/save_inventory/saver_strategies_spec.rb b/spec/models/manager_refresh/save_inventory/saver_strategies_spec.rb
index e18dacbb2c7..7253d0c603c 100644
--- a/spec/models/manager_refresh/save_inventory/saver_strategies_spec.rb
+++ b/spec/models/manager_refresh/save_inventory/saver_strategies_spec.rb
@@ -171,6 +171,12 @@
                 )
               )
             )
+            @data[:container_quota_items] = ::ManagerRefresh::InventoryCollection.new(
+              container_quota_items_init_data(inventory_collection_options(options))
+            )
+            @data[:container_quota_items_attrs] = ::ManagerRefresh::InventoryCollection.new(
+              container_quota_items_attrs_init_data(inventory_collection_options(options))
+            )
 
             # Parse data for InventoryCollections
             @network_port_data_1  = network_port_data(1).merge(
@@ -211,6 +217,16 @@
             @image_data_2 = image_data(2).merge(:name => "image_changed_name_2")
             @image_data_3 = image_data(3).merge(:name => "image_changed_name_3")
 
+            @container_quota_items_data_1 = container_quota_items_data(1)
+            @container_quota_items_data_2 = container_quota_items_data(2)
+
+            @container_quota_items_attrs_data_1 = container_quota_items_attrs_data(1).merge(
+              :resource => @data[:container_quota_items].lazy_find(container_quota_items_data(1)[:quota_desired])
+            )
+            @container_quota_items_attrs_data_2 = container_quota_items_attrs_data(2).merge(
+              :resource => @data[:container_quota_items].lazy_find(container_quota_items_data(2)[:quota_desired])
+            )
+
             # Fill InventoryCollections with data
             add_data_to_inventory_collection(@data[:network_ports],
                                              @network_port_data_1,
@@ -227,6 +243,12 @@
             add_data_to_inventory_collection(@data[:miq_templates],
                                              @image_data_2,
                                              @image_data_3)
+            add_data_to_inventory_collection(@data[:container_quota_items],
+                                             @container_quota_items_data_1,
+                                             @container_quota_items_data_2)
+            add_data_to_inventory_collection(@data[:container_quota_items_attrs],
+                                             @container_quota_items_attrs_data_1,
+                                             @container_quota_items_attrs_data_2)
             # Assert data before save
             expect(@network_port1.device).to eq @vm1
             expect(@network_port1.name).to eq "network_port_name_1"
@@ -253,6 +275,11 @@
 
             @image2 = MiqTemplate.find(@image2.id)
 
+            @quota_item_1 = ContainerQuotaItem.find_by(:quota_desired => container_quota_items_data(1)[:quota_desired])
+            @quota_item_2 = ContainerQuotaItem.find_by(:quota_desired => container_quota_items_data(2)[:quota_desired])
+            @quota_attr_1 = CustomAttribute.find_by(:name => container_quota_items_attrs_data(1)[:name])
+            @quota_attr_2 = CustomAttribute.find_by(:name => container_quota_items_attrs_data(2)[:name])
+
             # Check ICs stats
             expect(@data[:vms].created_records).to match_array(record_stats([@vm3, @vm31]))
             expect(@data[:vms].deleted_records).to match_array(record_stats([@vm1, @vm12, @vm4]))
@@ -391,6 +418,19 @@
             )
 
             expect(::ManageIQ::Providers::CloudManager::AuthKeyPair.all).to eq([])
+
+            assert_all_records_match_hashes(
+              [CustomAttribute.where(:resource_type => 'ContainerQuotaItem')],
+              {
+                :id          => @quota_attr_1.id,
+                :name        => @quota_attr_1.name,
+                :resource_id => @quota_item_1.id,
+              }, {
+                :id          => @quota_attr_2.id,
+                :name        => @quota_attr_2.name,
+                :resource_id => @quota_item_2.id,
+              }
+            )
           end
         end
       end