fix(db-postgres): querying on array within a relationship field (#8153)

## Description

Fixes https://github.com/payloadcms/payload/issues/6037
2.0 port of https://github.com/payloadcms/payload/pull/8152

- [x] I have read and understand the
[CONTRIBUTING.md](https://github.com/payloadcms/payload/blob/main/CONTRIBUTING.md)
document in this repository.

## Type of change

<!-- Please delete options that are not relevant. -->

- [x] Bug fix (non-breaking change which fixes an issue)
## Checklist:

- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] Existing test suite passes locally with my changes

test/relationships/config.ts

@@ -281,6 +281,31 @@ export default buildConfigWithDefaults({
         },
       ],
     },
+    {
+      slug: 'pages',
+      fields: [
+        {
+          type: 'array',
+          name: 'menu',
+          fields: [
+            {
+              name: 'label',
+              type: 'text',
+            },
+          ],
+        },
+      ],
+    },
+    {
+      slug: 'rels-to-pages',
+      fields: [
+        {
+          name: 'page',
+          type: 'relationship',
+          relationTo: 'pages',
+        },
+      ],
+    },
   ],
   onInit: async (payload) => {
     await payload.create({

test/relationships/int.spec.ts

@@ -666,6 +666,37 @@ describe('Relationships', () => {
         expect(query.docs).toHaveLength(1)
         expect(query.docs[0].id).toStrictEqual(firstLevelID)
       })
+
+      it('should allow querying within array nesting', async () => {
+        const page = await payload.create({
+          collection: 'pages',
+          data: {
+            menu: [
+              {
+                label: 'hello',
+              },
+            ],
+          },
+        })
+
+        const rel = await payload.create({ collection: 'rels-to-pages', data: { page: page.id } })
+
+        const resEquals = await payload.find({
+          collection: 'rels-to-pages',
+          where: { 'page.menu.label': { equals: 'hello' } },
+        })
+
+        expect(resEquals.totalDocs).toBe(1)
+        expect(resEquals.docs[0].id).toBe(rel.id)
+
+        const resIn = await payload.find({
+          collection: 'rels-to-pages',
+          where: { 'page.menu.label': { in: ['hello'] } },
+        })
+
+        expect(resIn.totalDocs).toBe(1)
+        expect(resIn.docs[0].id).toBe(rel.id)
+      })
     })
 
     describe('Nested Querying Separate Collections', () => {

test/relationships/payload-types.ts

@@ -1,4 +1,5 @@
 /* tslint:disable */
+/* eslint-disable */
 /**
  * This file was automatically generated by Payload.
  * DO NOT MODIFY IT BY HAND. Instead, modify your source Payload config,
@@ -8,34 +9,102 @@
 export interface Config {
   collections: {
     posts: Post
-    relation: Relation
     postsLocalized: PostsLocalized
+    relation: Relation
     'strict-access': StrictAccess
-    'chained-relation': ChainedRelation
-    'custom-id-relation': CustomIdRelation
-    'custom-id-number-relation': CustomIdNumberRelation
+    chained: Chained
+    'custom-id': CustomId
+    'custom-id-number': CustomIdNumber
     screenings: Screening
     movies: Movie
     directors: Director
+    movieReviews: MovieReview
+    'polymorphic-relationships': PolymorphicRelationship
+    tree: Tree
+    pages: Page
+    'rels-to-pages': RelsToPage
     users: User
+    'payload-preferences': PayloadPreference
+    'payload-migrations': PayloadMigration
   }
   globals: {}
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "posts".
+ */
 export interface Post {
   id: string
-  title?: string
-  description?: string
-  number?: number
-  relationField?: string | Relation
-  defaultAccessRelation?: string | StrictAccess
-  chainedRelation?: string | ChainedRelation
-  maxDepthRelation?: string | Relation
-  customIdRelation?: string | CustomIdRelation
-  customIdNumberRelation?: number | CustomIdNumberRelation
-  filteredRelation?: string | Relation
+  title?: string | null
+  description?: string | null
+  number?: number | null
+  relationField?: (string | null) | Relation
+  defaultAccessRelation?: (string | null) | StrictAccess
+  chainedRelation?: (string | null) | Chained
+  maxDepthRelation?: (string | null) | Relation
+  customIdRelation?: (string | null) | CustomId
+  customIdNumberRelation?: (number | null) | CustomIdNumber
+  filteredRelation?: (string | null) | Relation
   updatedAt: string
   createdAt: string
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "relation".
+ */
+export interface Relation {
+  id: string
+  name?: string | null
+  disableRelation: boolean
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "strict-access".
+ */
+export interface StrictAccess {
+  id: string
+  name?: string | null
+  disableRelation: boolean
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "chained".
+ */
+export interface Chained {
+  id: string
+  name?: string | null
+  relation?: (string | null) | Chained
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "custom-id".
+ */
+export interface CustomId {
+  id: string
+  name?: string | null
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "custom-id-number".
+ */
+export interface CustomIdNumber {
+  id: number
+  name?: string | null
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "postsLocalized".
+ */
 export interface PostsLocalized {
   id: string
   title?: string | null
@@ -43,68 +112,152 @@ export interface PostsLocalized {
   updatedAt: string
   createdAt: string
 }
-export interface Relation {
-  id: string
-  name?: string
-  disableRelation: boolean
-  updatedAt: string
-  createdAt: string
-}
-export interface StrictAccess {
-  id: string
-  name?: string
-  disableRelation: boolean
-  updatedAt: string
-  createdAt: string
-}
-export interface ChainedRelation {
-  id: string
-  name?: string
-  relation?: string | ChainedRelation
-  updatedAt: string
-  createdAt: string
-}
-export interface CustomIdRelation {
-  id: string
-  name?: string
-  updatedAt: string
-  createdAt: string
-}
-export interface CustomIdNumberRelation {
-  id: number
-  name?: string
-  updatedAt: string
-  createdAt: string
-}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "screenings".
+ */
 export interface Screening {
   id: string
-  name?: string
-  movie?: string | Movie
+  name?: string | null
+  movie?: (string | null) | Movie
   updatedAt: string
   createdAt: string
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "movies".
+ */
 export interface Movie {
   id: string
-  name?: string
-  director?: string | Director
+  name?: string | null
+  director?: (string | null) | Director
   updatedAt: string
   createdAt: string
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "directors".
+ */
 export interface Director {
   id: string
-  name?: string
-  movies?: Array<string | Movie>
+  name?: string | null
+  movies?: (string | Movie)[] | null
   updatedAt: string
   createdAt: string
 }
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "movieReviews".
+ */
+export interface MovieReview {
+  id: string
+  movieReviewer: string | User
+  likes?: (string | User)[] | null
+  visibility: 'followers' | 'public'
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "users".
+ */
 export interface User {
   id: string
   updatedAt: string
   createdAt: string
-  email?: string
-  resetPasswordToken?: string
-  resetPasswordExpiration?: string
-  loginAttempts?: number
-  lockUntil?: string
-  password?: string
+  email: string
+  resetPasswordToken?: string | null
+  resetPasswordExpiration?: string | null
+  salt?: string | null
+  hash?: string | null
+  loginAttempts?: number | null
+  lockUntil?: string | null
+  password: string | null
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "polymorphic-relationships".
+ */
+export interface PolymorphicRelationship {
+  id: string
+  polymorphic?: {
+    relationTo: 'movies'
+    value: string | Movie
+  } | null
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "tree".
+ */
+export interface Tree {
+  id: string
+  text?: string | null
+  parent?: (string | null) | Tree
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "pages".
+ */
+export interface Page {
+  id: string
+  menu?:
+    | {
+        label?: string | null
+        id?: string | null
+      }[]
+    | null
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "rels-to-pages".
+ */
+export interface RelsToPage {
+  id: string
+  page?: (string | null) | Page
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "payload-preferences".
+ */
+export interface PayloadPreference {
+  id: string
+  user: {
+    relationTo: 'users'
+    value: string | User
+  }
+  key?: string | null
+  value?:
+    | {
+        [k: string]: unknown
+      }
+    | unknown[]
+    | string
+    | number
+    | boolean
+    | null
+  updatedAt: string
+  createdAt: string
+}
+/**
+ * This interface was referenced by `Config`'s JSON-Schema
+ * via the `definition` "payload-migrations".
+ */
+export interface PayloadMigration {
+  id: string
+  name?: string | null
+  batch?: number | null
+  updatedAt: string
+  createdAt: string
+}
+
+declare module 'payload' {
+  export interface GeneratedTypes extends Config {}
 }