ActiveRecord UnknownPrimaryKey class UnknownPrimaryKey Ruby on Rails 7.0.10 Since v3.1.12 Available in: v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2 Compare with: (choosing a version navigates to the comparison) Choose a version v3.1.12 · changed v3.2.22.5 · changed v4.0.13 · changed v4.1.16 · same v4.2.9 · same v5.2.8.1 · same v6.0.6 · same v6.1.7.10 · same v7.1.6 · same v7.2.3 · same v8.0.4 · same v8.1.2 · same Raised when a primary key is needed, but not specified in the schema or model. Inherits from ActiveRecord::ActiveRecordError Attributes ActiveRecord::UnknownPrimaryKey#model Methods (defined here) self. new On this page Attributes Methods Support Bug Reports can be filed for the Ruby on Rails project on GitHub. Feature requests should be discussed on the rubyonrails-core forum. License Released under the MIT license.