create org model and schema manager

app/models/current.rb

@@ -1,4 +1,5 @@
 class Current < ActiveSupport::CurrentAttributes
   attribute :session
   delegate :user, to: :session, allow_nil: true
+  attribute :organization, :user
 end

app/models/organization.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class Organization < ApplicationRecord
+  validates :name, presence: true
+  validates :subdomain, presence: true, uniqueness: true
+  
+  after_create :create_schema
+  before_destroy :drop_schema
+  
+  def schema_name
+    "org_#{id.to_s.gsub('-', '_')}"
+  end
+  
+  def with_schema(&block)
+    SchemaManager.with_schema(id, &block)
+  end
+  
+  private
+  
+  def create_schema
+    SchemaManager.create_schema(id)
+  end
+  
+  def drop_schema
+    SchemaManager.drop_schema(id)
+  end
+end

app/models/schema_manager.rb

@@ -0,0 +1,67 @@
+# app/models/schema_manager.rb
+class SchemaManager
+  class << self
+    def create_schema(organization_id)
+      schema_name = schema_name_for(organization_id)
+      
+      ActiveRecord::Base.connection.execute("CREATE SCHEMA IF NOT EXISTS #{schema_name}")
+      
+      with_schema(organization_id) do
+        # Run all existing migrations in this schema
+        migration_context = ActiveRecord::MigrationContext.new(Rails.application.paths["db/migrate"].first)
+        migration_context.migrate
+      end
+    end
+    
+    def drop_schema(organization_id)
+      schema_name = schema_name_for(organization_id)
+      ActiveRecord::Base.connection.execute("DROP SCHEMA IF EXISTS #{schema_name} CASCADE")
+    end
+    
+    def with_schema(organization_id)
+      schema_name = schema_name_for(organization_id)
+      original_schema = ActiveRecord::Base.connection.schema_search_path
+      
+      begin
+        ActiveRecord::Base.connection.schema_search_path = schema_name
+        yield
+      ensure
+        ActiveRecord::Base.connection.schema_search_path = original_schema
+      end
+    end
+    
+    def schema_name_for(organization_id)
+      "org_#{organization_id.to_s.gsub('-', '_')}"
+    end
+    
+    # Migrate all existing organization schemas
+    def migrate_all_schemas
+      migration_context = ActiveRecord::MigrationContext.new(Rails.application.paths["db/migrate"].first)
+      
+      Organization.find_each do |org|
+        puts "Migrating schema for #{org.name}..."
+        org.with_schema do
+          migration_context.migrate
+        end
+      end
+    end
+    
+    # List all organization schemas
+    def list_schemas
+      result = ActiveRecord::Base.connection.execute(
+        "SELECT schema_name FROM information_schema.schemata 
+         WHERE schema_name LIKE 'org_%'"
+      )
+      result.map { |row| row['schema_name'] }
+    end
+    
+    # Check if schema exists
+    def schema_exists?(organization_id)
+      schema_name = schema_name_for(organization_id)
+      result = ActiveRecord::Base.connection.execute(
+        "SELECT EXISTS(SELECT 1 FROM information_schema.schemata WHERE schema_name = '#{schema_name}')"
+      )
+      result.first['exists']
+    end
+  end
+end