feat: add json support

lib/staging_table/bulk_inserter.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require "json"
+
 module StagingTable
   class BulkInserter
     attr_reader :model, :batch_size
@@ -37,7 +39,12 @@ def connection
     end
 
     def quote(value)
-      connection.quote(value)
+      case value
+      when Array, Hash
+        connection.quote(value.to_json)
+      else
+        connection.quote(value)
+      end
     end
   end
 end

spec/staging_table/bulk_inserter_spec.rb

@@ -88,12 +88,40 @@
     end
   end
 
+  shared_examples "bulk inserter with JSON support" do
+    describe "#insert with JSON" do
+      it "handles array values for JSON/JSONB columns" do
+        records = [
+          {name: "John", email: "john@example.com", tags: %w[admin user]}
+        ]
+
+        inserter.insert(records)
+
+        user = staging_model.first
+        expect(user.tags).to eq(%w[admin user])
+      end
+
+      it "handles hash values for JSON/JSONB columns" do
+        records = [
+          {name: "John", email: "john@example.com", metadata: {role: "admin", level: 5}}
+        ]
+
+        inserter.insert(records)
+
+        user = staging_model.first
+        expect(user.metadata).to eq({"role" => "admin", "level" => 5})
+      end
+    end
+  end
+
   context "with PostgreSQL", :postgresql do
     include_examples "bulk inserter"
+    include_examples "bulk inserter with JSON support"
   end
 
   context "with MySQL", :mysql do
     include_examples "bulk inserter"
+    include_examples "bulk inserter with JSON support"
   end
 
   context "with SQLite", :sqlite do

spec/support/database_helper.rb

@@ -187,13 +187,17 @@ def create_test_tables
         DROP TABLE IF EXISTS test_users
       SQL
 
+      json_type = /postgresql/.match?(ActiveRecord::Base.connection.adapter_name.downcase) ? "JSONB" : "JSON"
+
       ActiveRecord::Base.connection.execute(<<~SQL)
         CREATE TABLE test_users (
           id SERIAL PRIMARY KEY,
           name VARCHAR(255),
           email VARCHAR(255),
           age INTEGER,
           active BOOLEAN DEFAULT true,
+          tags #{json_type},
+          metadata #{json_type},
           created_at TIMESTAMP,
           updated_at TIMESTAMP
         )
@@ -219,6 +223,8 @@ def create_sqlite_test_tables
           email VARCHAR(255),
           age INTEGER,
           active BOOLEAN DEFAULT 1,
+          tags TEXT,
+          metadata TEXT,
           created_at DATETIME,
           updated_at DATETIME
         )