fix(types): add isSoftDeleted to Model (#11628)

types/lib/model.d.ts

@@ -2728,6 +2728,15 @@ export abstract class Model<T = any, T2 = any> extends Hooks {
    * values gotten from the DB, and apply all custom getters.
    */
   public toJSON(): object;
+
+  /**
+   * Helper method to determine if a instance is "soft deleted". This is
+   * particularly useful if the implementer renamed the deletedAt attribute to
+   * something different. This method requires paranoid to be enabled.
+   *
+   * Throws an error if paranoid is not enabled.
+   */
+  public isSoftDeleted(): boolean;
 }
 
 export type ModelType = typeof Model;

types/test/models/User.ts

@@ -119,3 +119,6 @@ User.scope([
   'custom2',
   { method: [ 'custom', 32 ] }
 ])
+
+const instance = new User({ username: 'foo', firstName: 'bar', lastName: 'baz' });
+instance.isSoftDeleted()