Add global_records_identifier configuration

CHANGELOG.md

@@ -16,6 +16,16 @@ ActsAsTenant.configure do |config|
 end
 ```
 
+* Add `config.global_records_identifier` configuration. [#332](https://github.com/ErwinM/acts_as_tenant/pull/332)
+
+This is helpful when you want to use a different global records identifier instead of `nil`:
+
+```ruby
+ActsAsTenant.configure do |config|
+  config.global_records_identifier = 1
+end
+```
+
 1.0.1
 -----
 

README.md

@@ -253,6 +253,7 @@ are shown below with sample overrides following. In `config/initializers/acts_as
 ```ruby
 ActsAsTenant.configure do |config|
   config.require_tenant = false # true
+  config.global_records_identifier = nil
 
   # Customize the query for loading the tenant in background jobs
   config.job_scope = ->{ all }

lib/acts_as_tenant.rb

@@ -58,6 +58,10 @@ def self.add_global_record_model model
     @@models_with_global_records.push(model)
   end
 
+  def self.global_records_identifier
+    ActsAsTenant.configuration.global_records_identifier
+  end
+
   def self.fkey
     "#{@@tenant_klass}_id"
   end

lib/acts_as_tenant/configuration.rb

@@ -1,6 +1,6 @@
 module ActsAsTenant
   class Configuration
-    attr_writer :require_tenant, :pkey
+    attr_writer :require_tenant, :pkey, :global_records_identifier
     attr_reader :tenant_change_hook
 
     def require_tenant
@@ -11,6 +11,10 @@ def pkey
       @pkey ||= :id
     end
 
+    def global_records_identifier
+      @global_records_identifier ||= nil
+    end
+
     def job_scope
       @job_scope || ->(relation) { relation.all }
     end

lib/acts_as_tenant/model_extensions.rb

@@ -23,7 +23,7 @@ def acts_as_tenant(tenant = :account, scope = nil, **options)
 
           if ActsAsTenant.current_tenant
             keys = [ActsAsTenant.current_tenant.send(pkey)].compact
-            keys.push(nil) if options[:has_global_records]
+            keys.push(ActsAsTenant.global_records_identifier) if options[:has_global_records]
 
             if options[:through]
               query_criteria = {options[:through] => {fkey.to_sym => keys}}