Issue #2628230 by Lendude, mohit_aghera, wadmiraal, usrsbn, cilefen, dawehner, nubeli: Adding File Usage "File" relationship results in broken/missing handler

core/modules/file/src/FileViewsData.php

@@ -121,6 +121,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('Content'),
         'label' => $this->t('Content'),
         'base' => 'node_field_data',
@@ -137,6 +138,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['file_managed', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'fid',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
@@ -154,6 +156,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('User'),
         'label' => $this->t('User'),
         'base' => 'users',
@@ -170,6 +173,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['file_managed', 'node_field_data', 'node_field_revision', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'fid',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
@@ -187,6 +191,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('Comment'),
         'label' => $this->t('Comment'),
         'base' => 'comment_field_data',
@@ -203,6 +208,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['file_managed', 'node_field_data', 'node_field_revision', 'users_field_data', 'taxonomy_term_field_data'],
       'real field' => 'fid',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',
@@ -220,6 +226,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data', 'taxonomy_term_field_data'],
       'real field' => 'id',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('Taxonomy Term'),
         'label' => $this->t('Taxonomy Term'),
         'base' => 'taxonomy_term_data',
@@ -236,6 +243,7 @@ class FileViewsData extends EntityViewsData {
       'skip base' => ['file_managed', 'node_field_data', 'node_field_revision', 'users_field_data', 'comment_field_data'],
       'real field' => 'fid',
       'relationship' => [
+        'id' => 'standard',
         'title' => $this->t('File'),
         'label' => $this->t('File'),
         'base' => 'file_managed',

core/modules/file/tests/modules/file_test_views/config/optional/node.type.file_test.yml

@@ -0,0 +1,9 @@
+type: file_test
+name: File test
+description: 'Bundle for testing file relationships.'
+help: ''
+new_revision: true
+display_submitted: true
+preview_mode: 1
+status: true
+langcode: en

core/modules/file/tests/modules/file_test_views/config/optional/views.view.test_file_to_node.yml

@@ -0,0 +1,217 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - node
+    - user
+id: test_file_to_node
+label: test_file_to_node
+module: views
+description: ''
+tag: ''
+base_table: file_managed
+base_field: fid
+core: 8.x
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      access:
+        type: perm
+        options:
+          perm: 'access content'
+      cache:
+        type: tag
+        options: {  }
+      query:
+        type: views_query
+        options:
+          disable_sql_rewrite: false
+          distinct: false
+          replica: false
+          query_comment: ''
+          query_tags: {  }
+      exposed_form:
+        type: basic
+        options:
+          submit_button: Apply
+          reset_button: false
+          reset_button_label: Reset
+          exposed_sorts_label: 'Sort by'
+          expose_sort_order: true
+          sort_asc_label: Asc
+          sort_desc_label: Desc
+      pager:
+        type: mini
+        options:
+          items_per_page: 10
+          offset: 0
+          id: 0
+          total_pages: null
+          expose:
+            items_per_page: false
+            items_per_page_label: 'Items per page'
+            items_per_page_options: '5, 10, 25, 50'
+            items_per_page_options_all: false
+            items_per_page_options_all_label: '- All -'
+            offset: false
+            offset_label: Offset
+          tags:
+            previous: ‹‹
+            next: ››
+      style:
+        type: default
+        options:
+          grouping: {  }
+          row_class: ''
+          default_row_class: true
+          uses_fields: false
+      row:
+        type: fields
+        options:
+          inline: {  }
+          separator: ''
+          hide_empty: false
+          default_field_elements: true
+      fields:
+        filename:
+          id: filename
+          table: file_managed
+          field: filename
+          entity_type: file
+          entity_field: filename
+          label: ''
+          alter:
+            alter_text: false
+            make_link: false
+            absolute: false
+            trim: false
+            word_boundary: false
+            ellipsis: false
+            strip_tags: false
+            html: false
+          hide_empty: false
+          empty_zero: false
+          plugin_id: field
+          type: file_link
+          relationship: none
+          group_type: group
+          admin_label: ''
+          exclude: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: true
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_alter_empty: true
+          click_sort_column: value
+          settings: {  }
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+        nid:
+          id: nid
+          table: node_field_data
+          field: nid
+          relationship: file_to_node_1
+          group_type: group
+          admin_label: ''
+          label: ''
+          exclude: false
+          alter:
+            alter_text: false
+            text: ''
+            make_link: false
+            path: ''
+            absolute: false
+            external: false
+            replace_spaces: false
+            path_case: none
+            trim_whitespace: false
+            alt: ''
+            rel: ''
+            link_class: ''
+            prefix: ''
+            suffix: ''
+            target: ''
+            nl2br: false
+            max_length: 0
+            word_boundary: true
+            ellipsis: true
+            more_link: false
+            more_link_text: ''
+            more_link_path: ''
+            strip_tags: false
+            trim: false
+            preserve_tags: ''
+            html: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: false
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          click_sort_column: value
+          type: number_integer
+          settings:
+            thousand_separator: ''
+            prefix_suffix: true
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+          entity_type: node
+          entity_field: nid
+          plugin_id: field
+      filters: {  }
+      sorts: {  }
+      header: {  }
+      footer: {  }
+      empty: {  }
+      relationships:
+        file_to_node_1:
+          id: file_to_node_1
+          table: file_usage
+          field: file_to_node
+          relationship: none
+          group_type: group
+          admin_label: Content
+          required: true
+          plugin_id: standard
+      arguments: {  }
+      display_extenders: {  }
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - 'languages:language_content'
+        - 'languages:language_interface'
+        - url.query_args
+        - user.permissions
+      tags: {  }

core/modules/file/tests/modules/file_test_views/config/optional/views.view.test_file_to_user.yml

@@ -0,0 +1,214 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - user
+id: test_file_to_user
+label: test_file_to_user
+module: views
+description: ''
+tag: ''
+base_table: file_managed
+base_field: fid
+core: 8.x
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      access:
+        type: perm
+        options:
+          perm: 'access content'
+      cache:
+        type: tag
+        options: {  }
+      query:
+        type: views_query
+        options:
+          disable_sql_rewrite: false
+          distinct: false
+          replica: false
+          query_comment: ''
+          query_tags: {  }
+      exposed_form:
+        type: basic
+        options:
+          submit_button: Apply
+          reset_button: false
+          reset_button_label: Reset
+          exposed_sorts_label: 'Sort by'
+          expose_sort_order: true
+          sort_asc_label: Asc
+          sort_desc_label: Desc
+      pager:
+        type: mini
+        options:
+          items_per_page: 10
+          offset: 0
+          id: 0
+          total_pages: null
+          expose:
+            items_per_page: false
+            items_per_page_label: 'Items per page'
+            items_per_page_options: '5, 10, 25, 50'
+            items_per_page_options_all: false
+            items_per_page_options_all_label: '- All -'
+            offset: false
+            offset_label: Offset
+          tags:
+            previous: ‹‹
+            next: ››
+      style:
+        type: default
+        options:
+          grouping: {  }
+          row_class: ''
+          default_row_class: true
+          uses_fields: false
+      row:
+        type: fields
+        options:
+          inline: {  }
+          separator: ''
+          hide_empty: false
+          default_field_elements: true
+      fields:
+        filename:
+          id: filename
+          table: file_managed
+          field: filename
+          entity_type: file
+          entity_field: filename
+          label: ''
+          alter:
+            alter_text: false
+            make_link: false
+            absolute: false
+            trim: false
+            word_boundary: false
+            ellipsis: false
+            strip_tags: false
+            html: false
+          hide_empty: false
+          empty_zero: false
+          plugin_id: field
+          type: file_link
+          relationship: none
+          group_type: group
+          admin_label: ''
+          exclude: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: true
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_alter_empty: true
+          click_sort_column: value
+          settings: {  }
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+        uuid:
+          id: uuid
+          table: users
+          field: uuid
+          relationship: file_to_user
+          group_type: group
+          admin_label: ''
+          label: ''
+          exclude: false
+          alter:
+            alter_text: false
+            text: ''
+            make_link: false
+            path: ''
+            absolute: false
+            external: false
+            replace_spaces: false
+            path_case: none
+            trim_whitespace: false
+            alt: ''
+            rel: ''
+            link_class: ''
+            prefix: ''
+            suffix: ''
+            target: ''
+            nl2br: false
+            max_length: 0
+            word_boundary: true
+            ellipsis: true
+            more_link: false
+            more_link_text: ''
+            more_link_path: ''
+            strip_tags: false
+            trim: false
+            preserve_tags: ''
+            html: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: false
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          click_sort_column: value
+          type: string
+          settings:
+            link_to_entity: false
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+          entity_type: user
+          entity_field: uuid
+          plugin_id: field
+      filters: {  }
+      sorts: {  }
+      header: {  }
+      footer: {  }
+      empty: {  }
+      relationships:
+        file_to_user:
+          id: file_to_user
+          table: file_usage
+          field: file_to_user
+          relationship: none
+          group_type: group
+          admin_label: User
+          required: true
+      arguments: {  }
+      display_extenders: {  }
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - 'languages:language_content'
+        - 'languages:language_interface'
+        - url.query_args
+        - user.permissions
+      tags: {  }

core/modules/file/tests/modules/file_test_views/config/optional/views.view.test_node_to_file.yml

@@ -0,0 +1,219 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - node
+    - user
+id: test_node_to_file
+label: test_node_to_file
+module: views
+description: ''
+tag: ''
+base_table: node_field_data
+base_field: nid
+core: 8.x
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      access:
+        type: perm
+        options:
+          perm: 'access content'
+      cache:
+        type: tag
+        options: {  }
+      query:
+        type: views_query
+        options:
+          disable_sql_rewrite: false
+          distinct: false
+          replica: false
+          query_comment: ''
+          query_tags: {  }
+      exposed_form:
+        type: basic
+        options:
+          submit_button: Apply
+          reset_button: false
+          reset_button_label: Reset
+          exposed_sorts_label: 'Sort by'
+          expose_sort_order: true
+          sort_asc_label: Asc
+          sort_desc_label: Desc
+      pager:
+        type: mini
+        options:
+          items_per_page: 10
+          offset: 0
+          id: 0
+          total_pages: null
+          expose:
+            items_per_page: false
+            items_per_page_label: 'Items per page'
+            items_per_page_options: '5, 10, 25, 50'
+            items_per_page_options_all: false
+            items_per_page_options_all_label: '- All -'
+            offset: false
+            offset_label: Offset
+          tags:
+            previous: ‹‹
+            next: ››
+      style:
+        type: default
+        options:
+          grouping: {  }
+          row_class: ''
+          default_row_class: true
+          uses_fields: false
+      row:
+        type: fields
+        options:
+          inline: {  }
+          separator: ''
+          hide_empty: false
+          default_field_elements: true
+      fields:
+        title:
+          id: title
+          table: node_field_data
+          field: title
+          entity_type: node
+          entity_field: title
+          label: ''
+          alter:
+            alter_text: false
+            make_link: false
+            absolute: false
+            trim: false
+            word_boundary: false
+            ellipsis: false
+            strip_tags: false
+            html: false
+          hide_empty: false
+          empty_zero: false
+          settings:
+            link_to_entity: true
+          plugin_id: field
+          relationship: none
+          group_type: group
+          admin_label: ''
+          exclude: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: true
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_alter_empty: true
+          click_sort_column: value
+          type: string
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+        fid:
+          id: fid
+          table: file_managed
+          field: fid
+          relationship: node_to_file
+          group_type: group
+          admin_label: ''
+          label: ''
+          exclude: false
+          alter:
+            alter_text: false
+            text: ''
+            make_link: false
+            path: ''
+            absolute: false
+            external: false
+            replace_spaces: false
+            path_case: none
+            trim_whitespace: false
+            alt: ''
+            rel: ''
+            link_class: ''
+            prefix: ''
+            suffix: ''
+            target: ''
+            nl2br: false
+            max_length: 0
+            word_boundary: true
+            ellipsis: true
+            more_link: false
+            more_link_text: ''
+            more_link_path: ''
+            strip_tags: false
+            trim: false
+            preserve_tags: ''
+            html: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: false
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          click_sort_column: value
+          type: number_integer
+          settings:
+            thousand_separator: ''
+            prefix_suffix: true
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+          entity_type: file
+          entity_field: fid
+          plugin_id: field
+      filters: {  }
+      sorts: {  }
+      header: {  }
+      footer: {  }
+      empty: {  }
+      relationships:
+        node_to_file:
+          id: node_to_file
+          table: file_usage
+          field: node_to_file
+          relationship: none
+          group_type: group
+          admin_label: File
+          required: true
+          plugin_id: standard
+      arguments: {  }
+      display_extenders: {  }
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - 'languages:language_content'
+        - 'languages:language_interface'
+        - url.query_args
+        - 'user.node_grants:view'
+        - user.permissions
+      tags: {  }

core/modules/file/tests/modules/file_test_views/config/optional/views.view.test_user_to_file.yml

@@ -0,0 +1,233 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - user
+id: test_user_to_file
+label: test_user_to_file
+module: views
+description: ''
+tag: ''
+base_table: users_field_data
+base_field: uid
+core: 8.x
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      access:
+        type: perm
+        options:
+          perm: 'access user profiles'
+      cache:
+        type: tag
+        options: {  }
+      query:
+        type: views_query
+        options:
+          disable_sql_rewrite: false
+          distinct: false
+          replica: false
+          query_comment: ''
+          query_tags: {  }
+      exposed_form:
+        type: basic
+        options:
+          submit_button: Apply
+          reset_button: false
+          reset_button_label: Reset
+          exposed_sorts_label: 'Sort by'
+          expose_sort_order: true
+          sort_asc_label: Asc
+          sort_desc_label: Desc
+      pager:
+        type: mini
+        options:
+          items_per_page: 10
+          offset: 0
+          id: 0
+          total_pages: null
+          expose:
+            items_per_page: false
+            items_per_page_label: 'Items per page'
+            items_per_page_options: '5, 10, 25, 50'
+            items_per_page_options_all: false
+            items_per_page_options_all_label: '- All -'
+            offset: false
+            offset_label: Offset
+          tags:
+            previous: ‹‹
+            next: ››
+      style:
+        type: default
+        options:
+          grouping: {  }
+          row_class: ''
+          default_row_class: true
+          uses_fields: false
+      row:
+        type: fields
+        options:
+          inline: {  }
+          separator: ''
+          hide_empty: false
+          default_field_elements: true
+      fields:
+        fid:
+          id: fid
+          table: file_managed
+          field: fid
+          relationship: user_to_file
+          group_type: group
+          admin_label: ''
+          label: ''
+          exclude: false
+          alter:
+            alter_text: false
+            text: ''
+            make_link: false
+            path: ''
+            absolute: false
+            external: false
+            replace_spaces: false
+            path_case: none
+            trim_whitespace: false
+            alt: ''
+            rel: ''
+            link_class: ''
+            prefix: ''
+            suffix: ''
+            target: ''
+            nl2br: false
+            max_length: 0
+            word_boundary: true
+            ellipsis: true
+            more_link: false
+            more_link_text: ''
+            more_link_path: ''
+            strip_tags: false
+            trim: false
+            preserve_tags: ''
+            html: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: false
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          click_sort_column: value
+          type: number_integer
+          settings:
+            thousand_separator: ''
+            prefix_suffix: true
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+          entity_type: file
+          entity_field: fid
+          plugin_id: field
+        uuid:
+          id: uuid
+          table: users
+          field: uuid
+          relationship: none
+          group_type: group
+          admin_label: ''
+          label: ''
+          exclude: false
+          alter:
+            alter_text: false
+            text: ''
+            make_link: false
+            path: ''
+            absolute: false
+            external: false
+            replace_spaces: false
+            path_case: none
+            trim_whitespace: false
+            alt: ''
+            rel: ''
+            link_class: ''
+            prefix: ''
+            suffix: ''
+            target: ''
+            nl2br: false
+            max_length: 0
+            word_boundary: true
+            ellipsis: true
+            more_link: false
+            more_link_text: ''
+            more_link_path: ''
+            strip_tags: false
+            trim: false
+            preserve_tags: ''
+            html: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: false
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          click_sort_column: value
+          type: string
+          settings:
+            link_to_entity: false
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+          entity_type: user
+          entity_field: uuid
+          plugin_id: field
+      filters: {  }
+      sorts: {  }
+      header: {  }
+      footer: {  }
+      empty: {  }
+      relationships:
+        user_to_file:
+          id: user_to_file
+          table: file_usage
+          field: user_to_file
+          relationship: none
+          group_type: group
+          admin_label: File
+          required: true
+          plugin_id: standard
+      arguments: {  }
+      display_extenders: {  }
+    cache_metadata:
+      max-age: -1
+      contexts:
+        - url.query_args
+        - user.permissions
+      tags: {  }

core/modules/file/tests/src/Kernel/Views/RelationshipNodeFileDataTest.php

@@ -0,0 +1,191 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\file\Kernel\Views;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\file\Entity\File;
+use Drupal\file\FileInterface;
+use Drupal\node\Entity\Node;
+use Drupal\node\NodeInterface;
+use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
+use Drupal\views\Tests\ViewTestData;
+use Drupal\views\Views;
+use Drupal\field\Entity\FieldStorageConfig;
+
+/**
+ * Tests file on node relationship handler.
+ *
+ * @group file
+ */
+class RelationshipNodeFileDataTest extends ViewsKernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['field', 'file', 'file_test_views', 'node', 'text'];
+
+  /**
+   * Views used by this test.
+   *
+   * @var array
+   */
+  public static $testViews = ['test_file_to_node', 'test_node_to_file'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp($import_test_views = TRUE): void {
+    parent::setUp($import_test_views);
+
+    $this->installSchema('file', 'file_usage');
+    $this->installEntitySchema('node');
+    $this->installEntitySchema('file');
+    $this->installEntitySchema('user');
+    $this->installConfig(['node', 'field', 'file_test_views']);
+
+    // Create the node file field and instance.
+    FieldStorageConfig::create([
+      'entity_type' => 'node',
+      'field_name' => 'node_file',
+      'type' => 'file',
+      'translatable' => '0',
+    ])->save();
+    FieldConfig::create([
+      'label' => 'Node File',
+      'description' => '',
+      'field_name' => 'node_file',
+      'entity_type' => 'node',
+      'bundle' => 'file_test',
+      'required' => 0,
+    ])->save();
+
+    ViewTestData::createTestViews(static::class, ['file_test_views']);
+  }
+
+  /**
+   * Tests using the views file_to_node relationship.
+   */
+  public function testViewsHandlerRelationshipFileToNode(): void {
+    $file1 = File::create([
+      'filename' => 'image-test.jpg',
+      'uri' => "public://image-test.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file1->enforceIsNew();
+    file_put_contents($file1->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file1->save();
+
+    $file2 = File::create([
+      'filename' => 'image-test-2.jpg',
+      'uri' => "public://image-test-2.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file2->enforceIsNew();
+    file_put_contents($file2->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file2->save();
+
+    $node1 = Node::create([
+      'type' => 'file_test',
+      'title' => $this->randomMachineName(8),
+      'created' => 1,
+      'changed' => 1,
+      'status' => NodeInterface::PUBLISHED,
+    ]);
+    $node1->save();
+
+    $node2 = Node::create([
+      'type' => 'file_test',
+      'title' => $this->randomMachineName(8),
+      'created' => 1,
+      'changed' => 1,
+      'status' => NodeInterface::PUBLISHED,
+      'node_file' => ['target_id' => $file2->id()],
+    ]);
+    $node2->save();
+
+    $view = Views::getView('test_file_to_node');
+    $this->executeView($view);
+    // We should only see a single file, the one on the user account. The other
+    // account's UUID, nor the other unlinked file, should appear in the
+    // results.
+    $expected_result = [
+      [
+        'fid' => $file2->id(),
+        'nid' => $node2->id(),
+      ],
+    ];
+    $column_map = ['fid' => 'fid', 'nid' => 'nid'];
+    $this->assertIdenticalResultset($view, $expected_result, $column_map);
+  }
+
+  /**
+   * Tests using the views node_to_file relationship.
+   */
+  public function testViewsHandlerRelationshipNodeToFile(): void {
+    $file1 = File::create([
+      'filename' => 'image-test.jpg',
+      'uri' => "public://image-test.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file1->enforceIsNew();
+    file_put_contents($file1->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file1->save();
+
+    $file2 = File::create([
+      'filename' => 'image-test-2.jpg',
+      'uri' => "public://image-test-2.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file2->enforceIsNew();
+    file_put_contents($file2->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file2->save();
+
+    $node1 = Node::create([
+      'type' => 'file_test',
+      'title' => $this->randomMachineName(8),
+      'created' => 1,
+      'changed' => 1,
+      'status' => NodeInterface::PUBLISHED,
+    ]);
+    $node1->save();
+
+    $node2 = Node::create([
+      'type' => 'file_test',
+      'title' => $this->randomMachineName(8),
+      'created' => 1,
+      'changed' => 1,
+      'status' => NodeInterface::PUBLISHED,
+      'node_file' => ['target_id' => $file2->id()],
+    ]);
+    $node2->save();
+
+    $view = Views::getView('test_node_to_file');
+    $this->executeView($view);
+    // We should only see a single file, the one on the user account. The other
+    // account's UUID, nor the other unlinked file, should appear in the
+    // results.
+    $expected_result = [
+      [
+        'fid' => $file2->id(),
+        'nid' => $node2->id(),
+      ],
+    ];
+    $column_map = ['fid' => 'fid', 'nid' => 'nid'];
+    $this->assertIdenticalResultset($view, $expected_result, $column_map);
+  }
+
+}

core/modules/file/tests/src/Kernel/Views/RelationshipUserFileDataTest.php

@@ -1,12 +1,16 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Drupal\Tests\file\Kernel\Views;
 
 use Drupal\field\Entity\FieldConfig;
 use Drupal\field\Entity\FieldStorageConfig;
 use Drupal\file\Entity\File;
-use Drupal\KernelTests\KernelTestBase;
+use Drupal\file\FileInterface;
 use Drupal\Tests\user\Traits\UserCreationTrait;
+use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
+use Drupal\user\Entity\User;
 use Drupal\views\Tests\ViewResultAssertionTrait;
 use Drupal\views\Views;
 use Drupal\views\Tests\ViewTestData;
@@ -16,7 +20,7 @@ use Drupal\views\Tests\ViewTestData;
  *
  * @group file
  */
-class RelationshipUserFileDataTest extends KernelTestBase {
+class RelationshipUserFileDataTest extends ViewsKernelTestBase {
 
   use UserCreationTrait;
   use ViewResultAssertionTrait;
@@ -38,15 +42,14 @@ class RelationshipUserFileDataTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $testViews = ['test_file_user_file_data'];
+  public static $testViews = ['test_file_user_file_data', 'test_user_to_file', 'test_file_to_user'];
 
   /**
    * {@inheritdoc}
    */
-  protected function setUp(): void {
+  protected function setUp($import_test_views = TRUE): void {
-    parent::setUp();
+    parent::setUp($import_test_views);
 
-    $this->installSchema('system', ['sequences']);
     $this->installSchema('file', ['file_usage']);
     $this->installEntitySchema('user');
     $this->installEntitySchema('file');
@@ -68,12 +71,13 @@ class RelationshipUserFileDataTest extends KernelTestBase {
     ])->save();
 
     ViewTestData::createTestViews(static::class, ['file_test_views']);
+    $this->installConfig(['field', 'file_test_views']);
   }
 
   /**
    * Tests using the views file relationship.
    */
-  public function testViewsHandlerRelationshipUserFileData() {
+  public function testViewsHandlerRelationshipUserFileData(): void {
     $file = File::create([
       'fid' => 2,
       'uid' => 2,
@@ -110,4 +114,114 @@ class RelationshipUserFileDataTest extends KernelTestBase {
     $this->assertIdenticalResultset($view, $expected_result, $column_map);
   }
 
+  /**
+   * Tests using the views user_to_file relationship.
+   */
+  public function testViewsHandlerRelationshipUserToFile(): void {
+    $file1 = File::create([
+      'filename' => 'image-test.jpg',
+      'uri' => "public://image-test.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file1->enforceIsNew();
+    file_put_contents($file1->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file1->save();
+
+    $file2 = File::create([
+      'filename' => 'image-test-2.jpg',
+      'uri' => "public://image-test-2.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file2->enforceIsNew();
+    file_put_contents($file2->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file2->save();
+
+    User::create([
+      'name' => $this->randomMachineName(8),
+      'mail' => $this->randomMachineName(4) . '@' . $this->randomMachineName(4) . '.com',
+    ])->save();
+
+    $account = User::create([
+      'name' => $this->randomMachineName(8),
+      'mail' => $this->randomMachineName(4) . '@' . $this->randomMachineName(4) . '.com',
+      'user_file' => ['target_id' => $file2->id()],
+    ]);
+    $account->save();
+
+    $view = Views::getView('test_user_to_file');
+    $this->executeView($view);
+    // We should only see a single file, the one on the user account. The other
+    // account's UUID, nor the other unlinked file, should appear in the
+    // results.
+    $expected_result = [
+      [
+        'fid' => $file2->id(),
+        'uuid' => $account->uuid(),
+      ],
+    ];
+    $column_map = ['fid' => 'fid', 'uuid' => 'uuid'];
+    $this->assertIdenticalResultset($view, $expected_result, $column_map);
+  }
+
+  /**
+   * Tests using the views file_to_user relationship.
+   */
+  public function testViewsHandlerRelationshipFileToUser(): void {
+    $file1 = File::create([
+      'filename' => 'image-test.jpg',
+      'uri' => "public://image-test.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file1->enforceIsNew();
+    file_put_contents($file1->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file1->save();
+
+    $file2 = File::create([
+      'filename' => 'image-test-2.jpg',
+      'uri' => "public://image-test-2.jpg",
+      'filemime' => 'image/jpeg',
+      'created' => 1,
+      'changed' => 1,
+      'status' => FileInterface::STATUS_PERMANENT,
+    ]);
+    $file2->enforceIsNew();
+    file_put_contents($file2->getFileUri(), file_get_contents('core/tests/fixtures/files/image-1.png'));
+    $file2->save();
+
+    User::create([
+      'name' => $this->randomMachineName(8),
+      'mail' => $this->randomMachineName(4) . '@' . $this->randomMachineName(4) . '.com',
+    ])->save();
+
+    $account = User::create([
+      'name' => $this->randomMachineName(8),
+      'mail' => $this->randomMachineName(4) . '@' . $this->randomMachineName(4) . '.com',
+      'user_file' => ['target_id' => $file2->id()],
+    ]);
+    $account->save();
+
+    $view = Views::getView('test_file_to_user');
+    $this->executeView($view);
+    // We should only see a single file, the one on the user account. The other
+    // account's UUID, nor the other unlinked file, should appear in the
+    // results.
+    $expected_result = [
+      [
+        'fid' => $file2->id(),
+        'uuid' => $account->uuid(),
+      ],
+    ];
+    $column_map = ['fid' => 'fid', 'uuid' => 'uuid'];
+    $this->assertIdenticalResultset($view, $expected_result, $column_map);
+  }
+
 }