refactor(deleteReferences): Remove restriction for subcollection

Author: michaelprichardson

src/common.ts

@@ -18,13 +18,6 @@ export function isConfig(arg: Rule | Config): arg is Config {
   return (arg as Config).config !== undefined;
 }
 
-export function isSubCollection(collection: string): boolean {
-  const filteredCollections = collection.split('/').filter(c => c.length > 0);
-  const numCollections = filteredCollections.length;
-  // Return false is equal to 1 or an even number
-  return numCollections !== 1 && numCollections % 2 === 1;
-}
-
 enum Key {
   Primary = '{(.*?)}',
   Foreign = '([$][^/]*|$)',

src/rules/deleteReferences.ts

@@ -1,10 +1,4 @@
-import {
-  Config,
-  Rule,
-  replaceReferencesWith,
-  getPrimaryKey,
-  isSubCollection,
-} from '../common';
+import { Config, Rule, replaceReferencesWith, getPrimaryKey } from '../common';
 
 export interface DeleteReferencesRule extends Rule {
   source: {
@@ -80,10 +74,6 @@ export function integrifyDeleteReferences(
           throw new Error(
             `integrify: missing foreign key or set deleteAll to true`
           );
-        } else if (target.deleteAll && !isSubCollection(target.collection)) {
-          throw new Error(
-            `integrify: [${target.collection}] is an invalid sub-collection`
-          );
         }
 
         // Replace the context.params in the target collection