Spring Data Rest: Wrong response schema for collection relations

[mathias-ewald]

Describe the bug
Schema for collection relations are wrongly detected. In the example of a Doctor entity holding a relation to a set of Clinics the api-doc returns RepresentationModelDoctor for /doctors/{id}/clinics instead of a collection model holding Clinics.

To Reproduce

• Spring Boot 2.4.3
• Springdocs 1.5.4 (springdoc-openapi-ui, springdoc-openapi-data-rest)

Doctor Entity

@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode(callSuper = false)
@Builder
public class Doctor extends BaseEntity {
	...
	@ManyToMany
	@Size(min = 1)
	@ArraySchema(
		schema = @Schema(
			implementation = String.class,
			accessMode = AccessMode.WRITE_ONLY
	))
	private Set<Clinic> clinics;
}

Clinic Entity

@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode(callSuper = false)
@Builder
public class Clinic extends BaseEntity {
	@NotNull
	@NotBlank
	private String name;

	@ElementCollection
	@Size(min = 1)
	private Set<Address> addresses;
}

Doctor repository:

@CrossOrigin
public interface DoctorRepo extends CrudRepository<Doctor, UUID> {
}

Clinic Repository:

@CrossOrigin
public interface ClinicRepo extends CrudRepository<Clinic, UUID> {
}

Generated api-doc for access to the relation:

  /doctors/{id}/clinics:
    get:
      tags:
      - doctor
      description: get-doctor
      operationId: followPropertyReference-doctor-get_1
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      responses:
        "200":
          description: OK
          content:
            application/hal+json:
              schema:
                $ref: '#/components/schemas/RepresentationModelDoctor'
            text/uri-list:
              schema:
                $ref: '#/components/schemas/RepresentationModelDoctor'
        "404":
          description: Not Found
...
components:
  schemas:
    RepresentationModelDoctor:
      type: object
      properties:
        _links:
          $ref: '#/components/schemas/Links'

Expected behavior

• A clear and concise description of what you expected to happen.
• What is the expected result using OpenAPI Description (yml or json)?

The response schema should be generated as a CollectionModel of the Clinic type.

[bnasslahsen]

Thank you for your clear description @mathias-ewald.
The fix is now available within the latest snapshot.