# Get predecessors for screen view

- Operation ID: `screenview-predecessors-get`
- HTTP method: `GET`
- Path: `/schema-service/v2/screen-views/{screenViewId}/predecessors`
- [Human-readable API reference](https://hub.synerise.com/api-reference/loyalty-and-engagement#tag/Screen-views/operation/screenview-predecessors-get)

## Self-contained OpenAPI method

The fenced document below contains this method's documentation and all of its local references. It is self-contained; no category or master specification fetch is required.

```yaml
openapi: 3.0.0
info:
  title: Synerise Public API
  version: 1.9.1
paths:
  /schema-service/v2/screen-views/{screenViewId}/predecessors:
    get:
      tags:
        - Screen views
      summary: Get predecessors for screen view
      description: |
        Retrieve information about documents or screen views that refer **to** the requested screen view.

        ---

        **API consumers:** <a href="/api-reference/authorization?tag=Authorization&amp;operationId=profileLogin" target="_blank" rel="noopener">Workspace (Business Profile)</a>, <a href="/api-reference/authorization?tag=Authorization&amp;operationId=userLogin" target="_blank" rel="noopener">Synerise User</a>

        **API key permission required:** `SCHEMA_SERVICE_SCHEMA_READ`

        **User role permission required:** `assets_docs: read`
      security:
        - JWT: []
      parameters:
        - name: screenViewId
          in: path
          required: true
          description: UUID of the screen view
          schema:
            type: string
            format: uuid
      responses:
        "200":
          description: Entities which refer to the requested screen view
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  required:
                    - id
                    - type
                    - children
                  properties:
                    id:
                      type: string
                      description: UUID of the screen view or document
                    type:
                      type: string
                      description: Type of the entity
                      enum:
                        - document
                        - screenview
                    name:
                      type: string
                      description: Name of the screen view or document (not slug)
                    children:
                      type: array
                      description: Screen views or documents that refer to this entity
                      items:
                        $ref: "#/components/schemas/schema-service-GraphObject"
        "400":
          description: See error message for details
          content:
            application/json:
              schema:
                type: object
                properties:
                  timestamp:
                    type: string
                    format: date-time
                    description: Time when the error occurred
                  errorCode:
                    type: string
                    description: |
                      Code of the error, needed for troubleshooting

                      See error reference: [https://developers.synerise.com/errors.html](https://developers.synerise.com/errors.html)
                  status:
                    type: integer
                    description: Error's HTTP status code
                  message:
                    type: string
                    description: Description of the problem
        "401":
          description: "Unauthorized: wrong consumer scope; token missing/expired/invalid; invalid API key; etc."
          content:
            application/json:
              schema:
                type: object
                properties:
                  timestamp:
                    type: string
                    description: Time when the error occurred
                  error:
                    type: string
                    description: Summary of the error
                  message:
                    type: string
                    description: Description of the problem
                  status:
                    type: integer
                    format: int32
                    description: HTTP status code
        "403":
          description: Forbidden; insufficient permissions
          content:
            application/json:
              schema:
                type: object
                properties:
                  timestamp:
                    type: string
                    description: Time when the error occurred
                  error:
                    type: string
                    description: Summary of the error
                  message:
                    type: string
                    description: Description of the problem
                  status:
                    type: integer
                    format: int32
                    description: HTTP status code
        "404":
          description: Resource not found
          content:
            application/json:
              schema:
                type: object
                properties:
                  timestamp:
                    type: string
                    format: date-time
                    description: Time when the error occurred
                  errorCode:
                    type: string
                    description: |
                      Code of the error, needed for troubleshooting

                      See error reference: [https://developers.synerise.com/errors.html](https://developers.synerise.com/errors.html)
                  status:
                    type: integer
                    description: Error's HTTP status code
                  message:
                    type: string
                    description: Description of the problem
        "500":
          description: See error message for details
          content:
            application/json:
              schema:
                type: object
                properties:
                  timestamp:
                    type: string
                    format: date-time
                    description: Time when the error occurred
                  errorCode:
                    type: string
                    description: |
                      Code of the error, needed for troubleshooting

                      See error reference: [https://developers.synerise.com/errors.html](https://developers.synerise.com/errors.html)
                  status:
                    type: integer
                    description: Error's HTTP status code
                  message:
                    type: string
                    description: Description of the problem
      operationId: screenview-predecessors-get
      x-snr-doc-urls:
        - /api-reference/loyalty-and-engagement#tag/Screen-views/operation/screenview-predecessors-get
      x-codeSamples:
        - lang: cURL
          label: cURL
          source: |-
            curl --request GET \
              --url https://api.synerise.com/schema-service/v2/screen-views/%7BscreenViewId%7D/predecessors \
              --header 'Authorization: Bearer REPLACE_BEARER_TOKEN'
        - lang: Python
          label: Python
          source: |-
            import http.client

            conn = http.client.HTTPSConnection("api.synerise.com")

            headers = { 'Authorization': "Bearer REPLACE_BEARER_TOKEN" }

            conn.request("GET", "/schema-service/v2/screen-views/%7BscreenViewId%7D/predecessors", headers=headers)

            res = conn.getresponse()
            data = res.read()

            print(data.decode("utf-8"))
        - lang: JavaScript
          label: JavaScript
          source: |-
            const data = null;

            const xhr = new XMLHttpRequest();
            xhr.withCredentials = true;

            xhr.addEventListener("readystatechange", function () {
              if (this.readyState === this.DONE) {
                console.log(this.responseText);
              }
            });

            xhr.open("GET", "https://api.synerise.com/schema-service/v2/screen-views/%7BscreenViewId%7D/predecessors");
            xhr.setRequestHeader("Authorization", "Bearer REPLACE_BEARER_TOKEN");

            xhr.send(data);
        - lang: Node.js
          label: Node.js
          source: |-
            const http = require("https");

            const options = {
              "method": "GET",
              "hostname": "api.synerise.com",
              "port": null,
              "path": "/schema-service/v2/screen-views/%7BscreenViewId%7D/predecessors",
              "headers": {
                "Authorization": "Bearer REPLACE_BEARER_TOKEN"
              }
            };

            const req = http.request(options, function (res) {
              const chunks = [];

              res.on("data", function (chunk) {
                chunks.push(chunk);
              });

              res.on("end", function () {
                const body = Buffer.concat(chunks);
                console.log(body.toString());
              });
            });

            req.end();
        - lang: PHP
          label: PHP
          source: |-
            <?php

            $request = new HttpRequest();
            $request->setUrl('https://api.synerise.com/schema-service/v2/screen-views/%7BscreenViewId%7D/predecessors');
            $request->setMethod(HTTP_METH_GET);

            $request->setHeaders([
              'Authorization' => 'Bearer REPLACE_BEARER_TOKEN'
            ]);

            try {
              $response = $request->send();

              echo $response->getBody();
            } catch (HttpException $ex) {
              echo $ex;
            }
        - lang: Java
          label: Java
          source: |-
            HttpResponse<String> response = Unirest.get("https://api.synerise.com/schema-service/v2/screen-views/%7BscreenViewId%7D/predecessors")
              .header("Authorization", "Bearer REPLACE_BEARER_TOKEN")
              .asString();
servers:
  - description: Microsoft Azure EU
    url: https://api.synerise.com
  - description: Microsoft Azure USA
    url: https://api.azu.synerise.com
  - description: Google Cloud Platform
    url: https://api.geb.synerise.com
tags:
  - name: Screen views
components:
  schemas:
    schema-service-GraphObject:
      type: object
      required:
        - id
        - type
        - children
      properties:
        id:
          type: string
          description: UUID of the screen view or document
        type:
          type: string
          description: Type of the entity
          enum:
            - document
            - screenview
        name:
          type: string
          description: Name of the screen view or document (not slug)
        children:
          type: array
          description: Screen views or documents that refer to this entity
          items:
            $ref: "#/components/schemas/schema-service-GraphObject"
  securitySchemes:
    JWT:
      type: http
      scheme: bearer
      description: |-
        JWT Bearer token. The header looks like this: `Bearer {JWT}`

        Remember to include the space between 'Bearer' and the token.

        Generate a token via the **Authorization** endpoints.
```