diff --git a/lib/staging_table/session.rb b/lib/staging_table/session.rb
index c620d38..cd2ad71 100644
--- a/lib/staging_table/session.rb
+++ b/lib/staging_table/session.rb
@@ -172,15 +172,15 @@ def ensure_table_created!
     end
 
     def normalize_records(records)
-      if records.is_a?(ActiveRecord::Relation)
-        records.map(&:attributes)
-      elsif records.respond_to?(:to_a)
-        records.to_a.map do |record|
-          record.is_a?(ActiveRecord::Base) ? record.attributes : record
-        end
-      else
-        records
-      end
+      return records unless records.is_a?(ActiveRecord::Relation) || records.is_a?(Array)
+
+      records.map { |record| normalize_record(record) }
+    end
+
+    def normalize_record(record)
+      return record unless record.is_a?(ActiveRecord::Base)
+
+      record.attributes_for_database
     end
   end
 end
diff --git a/rbs_collection.yaml b/rbs_collection.yaml
index 31c6319..d329757 100644
--- a/rbs_collection.yaml
+++ b/rbs_collection.yaml
@@ -13,6 +13,4 @@ path: .gem_rbs_collection
 gems:
   - name: activerecord
   - name: activesupport
-  # Ignore gems without RBS definitions in the collection
   - name: prism
-    ignore: true
diff --git a/spec/staging_table/enum_attributes_spec.rb b/spec/staging_table/enum_attributes_spec.rb
new file mode 100644
index 0000000..78b32d5
--- /dev/null
+++ b/spec/staging_table/enum_attributes_spec.rb
@@ -0,0 +1,127 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+class EnumTestRecord < ActiveRecord::Base
+  self.table_name = "enum_test_records"
+
+  if ActiveRecord.gem_version >= Gem::Version.new("7.0")
+    enum :foo, {bar: 2, baz: 3}
+  else
+    enum foo: {bar: 2, baz: 3}
+  end
+end
+
+# Regression coverage for the bug where `Session#normalize_records` calls
+# `attributes_before_type_cast` on AR objects, returning the *enum label*
+# (e.g. "bar") instead of the underlying database integer (e.g. 2).
+RSpec.describe "StagingTable with enum attributes" do
+  shared_examples "preserves enum integer values" do
+    let(:enum_values) do
+      EnumTestRecord.defined_enums.fetch("foo").transform_values(&:to_i)
+    end
+
+    let(:session) do
+      StagingTable::Session.new(EnumTestRecord)
+    end
+
+    before do
+      ActiveRecord::Base.connection.create_table(EnumTestRecord.table_name, force: true) do |t|
+        t.string :name
+        t.string :email
+        t.integer :foo
+        t.timestamps null: true
+      end
+      EnumTestRecord.reset_column_information
+    end
+
+    after do
+      session.drop_table
+      ActiveRecord::Base.connection.drop_table(EnumTestRecord.table_name, if_exists: true)
+    end
+
+    it "stages the enum's database integer, not the label, when given AR objects" do
+      record = EnumTestRecord.new(
+        id: 1,
+        name: "Alice",
+        email: "alice@example.com",
+        foo: :bar
+      )
+
+      session.create_table
+
+      expect { session.insert([record]) }.not_to raise_error
+
+      raw_value = session.staging_model.connection.select_value(
+        "SELECT foo FROM #{session.staging_model.table_name}"
+      )
+
+      expect(Integer(raw_value)).to eq(enum_values.fetch("bar"))
+    end
+
+    it "round-trips an enum value from AR object through staging into the source table" do
+      original = EnumTestRecord.new(
+        id: 2,
+        name: "Bob",
+        email: "bob@example.com",
+        foo: :bar
+      )
+
+      session.create_table
+      session.insert([original])
+      result = session.transfer
+
+      expect(result.inserted).to eq(1)
+      expect(EnumTestRecord.count).to eq(1)
+      expect(EnumTestRecord.first.foo).to eq("bar")
+    end
+
+    it "stages the enum integer when given an ActiveRecord::Relation" do
+      EnumTestRecord.create!(name: "Carol", email: "carol@example.com", foo: :bar)
+      EnumTestRecord.create!(name: "Dave", email: "dave@example.com", foo: :baz)
+
+      session.create_table
+
+      expect { session.insert(EnumTestRecord.all) }.not_to raise_error
+
+      staged_values = session.staging_model.connection.select_values(
+        "SELECT foo FROM #{session.staging_model.table_name} ORDER BY foo"
+      ).map { |value| Integer(value) }
+
+      expect(staged_values).to eq([
+        enum_values.fetch("bar"),
+        enum_values.fetch("baz")
+      ])
+    end
+
+    it "still accepts plain hashes with the integer value" do
+      session.create_table
+
+      expect {
+        session.insert([{
+          name: "Eve",
+          email: "eve@example.com",
+          foo: enum_values.fetch("bar")
+        }])
+      }.not_to raise_error
+
+      raw_value = session.staging_model.connection.select_value(
+        "SELECT foo FROM #{session.staging_model.table_name}"
+      )
+
+      expect(Integer(raw_value)).to eq(enum_values.fetch("bar"))
+    end
+  end
+
+  context "with PostgreSQL", :postgresql do
+    include_examples "preserves enum integer values"
+  end
+
+  context "with MySQL", :mysql do
+    include_examples "preserves enum integer values"
+  end
+
+  context "with SQLite", :sqlite do
+    include_examples "preserves enum integer values"
+  end
+end