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# File 'lib/activerecord-multi-tenant/model_extensions.rb', line 5
def multi_tenant(tenant_name, options = {})
if to_s.underscore.to_sym == tenant_name
unless MultiTenant.with_write_only_mode_enabled?
before_create -> { self.id ||= self.class.connection.select_value("SELECT nextval('" + [self.class.table_name, self.class.primary_key, 'seq'].join('_') + "'::regclass)") }
end
else
class << self
def scoped_by_tenant?
true
end
def partition_key
@partition_key ||= ancestors.detect{ |k| k.instance_variable_get(:@partition_key) }
.try(:instance_variable_get, :@partition_key)
end
def primary_key
return @primary_key if @primary_key
return @primary_key = super || DEFAULT_ID_FIELD if ActiveRecord::VERSION::MAJOR < 5
primary_object_keys = Array.wrap(connection.schema_cache.primary_keys(table_name)) - [partition_key]
if primary_object_keys.size == 1
@primary_key = primary_object_keys.first
else
@primary_key = DEFAULT_ID_FIELD
end
end
end
MultiTenant.register_multi_tenant_model(table_name, self)
@partition_key = options[:partition_key] || MultiTenant.partition_key(tenant_name)
partition_key = @partition_key
if MultiTenant.tenant_klass_defined?(tenant_name)
belongs_to tenant_name, options.slice(:class_name, :inverse_of).merge(foreign_key: partition_key)
end
after_initialize Proc.new { |record|
if MultiTenant.current_tenant_id && record.public_send(partition_key.to_sym).nil?
record.public_send("#{partition_key}=".to_sym, MultiTenant.current_tenant_id)
end
}
to_include = Module.new do
define_method "#{partition_key}=" do |tenant_id|
write_attribute("#{partition_key}", tenant_id)
raise MultiTenant::TenantIsImmutable if send("#{partition_key}_changed?") && persisted? && !send("#{partition_key}_was").nil?
tenant_id
end
if MultiTenant.tenant_klass_defined?(tenant_name)
define_method "#{tenant_name}=" do |model|
super(model)
raise MultiTenant::TenantIsImmutable if send("#{partition_key}_changed?") && persisted? && !send("#{partition_key}_was").nil?
model
end
define_method "#{tenant_name}" do
if !MultiTenant.current_tenant_is_id? && MultiTenant.current_tenant_id && public_send(partition_key) == MultiTenant.current_tenant_id
return MultiTenant.current_tenant
else
super()
end
end
end
end
include to_include
around_save -> (record, block) {
if persisted? && MultiTenant.current_tenant_id.nil?
MultiTenant.with(record.public_send(partition_key)) { block.call }
else
block.call
end
}
around_update -> (record, block) {
if MultiTenant.current_tenant_id.nil?
MultiTenant.with(record.public_send(partition_key)) { block.call }
else
block.call
end
}
around_destroy -> (record, block) {
if MultiTenant.current_tenant_id.nil?
MultiTenant.with(record.public_send(partition_key)) { block.call }
else
block.call
end
}
end
end
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