diff --git a/lib/typelizer.rb b/lib/typelizer.rb
index 46636cf..e91d3a7 100644
--- a/lib/typelizer.rb
+++ b/lib/typelizer.rb
@@ -18,6 +18,8 @@
 
 require_relative "typelizer/railtie" if defined?(Rails)
 
+require "logger"
+
 module Typelizer
   class << self
     def enabled?
diff --git a/lib/typelizer/config.rb b/lib/typelizer/config.rb
index 4b5b3f7..b5c634e 100644
--- a/lib/typelizer/config.rb
+++ b/lib/typelizer/config.rb
@@ -29,7 +29,11 @@ class Config < Struct.new(
     class << self
       def instance
         @instance ||= new(
-          serializer_name_mapper: ->(serializer) { serializer.name.ends_with?("Serializer") ? serializer.name.delete_suffix("Serializer") : serializer.name.delete_suffix("Resource") },
+          serializer_name_mapper: ->(serializer) do
+            return "" if serializer.name.nil?
+
+            serializer.name.ends_with?("Serializer") ? serializer.name&.delete_suffix("Serializer") : serializer.name&.delete_suffix("Resource")
+          end,
           serializer_model_mapper: ->(serializer) do
             base_class = serializer_name_mapper.call(serializer)
             Object.const_get(base_class) if Object.const_defined?(base_class)
diff --git a/lib/typelizer/generator.rb b/lib/typelizer/generator.rb
index 921775e..2cbb6aa 100644
--- a/lib/typelizer/generator.rb
+++ b/lib/typelizer/generator.rb
@@ -33,8 +33,9 @@ def target_serializers
         raise ArgumentError, "Please ensure all your serializers include Typelizer::DSL." if base_classes.none?
       end
 
-      (base_classes + base_classes.flat_map(&:descendants)).uniq.sort_by(&:name)
-        .reject { |serializer| Typelizer.reject_class.call(serializer: serializer) }
+      (base_classes + base_classes.flat_map(&:descendants)).uniq
+        .reject { |serializer| Typelizer.reject_class.call(serializer: serializer) || serializer.name.nil? }
+        .sort_by(&:name)
     end
 
     def read_serializers(files = nil)
diff --git a/lib/typelizer/inline_type.rb b/lib/typelizer/inline_type.rb
new file mode 100644
index 0000000..5f5f3f0
--- /dev/null
+++ b/lib/typelizer/inline_type.rb
@@ -0,0 +1,22 @@
+module Typelizer
+  # InlineType is mainly used with Alba plugin to represent inline associations.
+  # `name `method` is the same interface as `Interface` class.
+  class InlineType
+    TEMPLATE = <<~ERB.strip
+      {
+        <%- properties.each do |property| %>
+          <%= property %>;
+        <% end %>
+      }
+    ERB
+    def initialize(serializer:, config:)
+      @serializer = serializer
+      @config = config
+    end
+
+    def name
+      properties = SerializerPlugins::Alba.new(serializer: @serializer, config: @config).properties
+      ERB.new(TEMPLATE, trim_mode: "-").result_with_hash(properties: properties)
+    end
+  end
+end
diff --git a/lib/typelizer/interface.rb b/lib/typelizer/interface.rb
index 11d62a3..c0f7625 100644
--- a/lib/typelizer/interface.rb
+++ b/lib/typelizer/interface.rb
@@ -54,6 +54,7 @@ def imports
         .filter_map { |interface| interface.name if interface.name != name }
 
       custom_type_imports = attribute_types
+        .reject { |type| type.is_a?(InlineType) }
         .flat_map { |type| extract_typescript_types(type.to_s) }
         .uniq
         .reject { |type| global_type?(type) }
diff --git a/lib/typelizer/serializer_plugins/alba.rb b/lib/typelizer/serializer_plugins/alba.rb
index dfb4830..b61dd98 100644
--- a/lib/typelizer/serializer_plugins/alba.rb
+++ b/lib/typelizer/serializer_plugins/alba.rb
@@ -1,4 +1,5 @@
 require_relative "base"
+require_relative "../inline_type"
 
 module Typelizer
   module SerializerPlugins
@@ -74,9 +75,10 @@ def build_property(name, attr, **options)
           )
         when ::Alba::Association
           resource = attr.instance_variable_get(:@resource)
+          type = (resource.is_a?(Class) && !resource.name.nil?) ? Interface.new(serializer: resource) : InlineType.new(serializer: resource, config: {})
           Property.new(
             name: name,
-            type: Interface.new(serializer: resource),
+            type: type,
             optional: false,
             nullable: false,
             multi: false, # we override this in typelize_method_transform