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// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2025 Weaviate B.V. All rights reserved.
//
// CONTACT: hello@weaviate.io
//
package objects
import (
"context"
"errors"
"fmt"
"slices"
"github.com/weaviate/weaviate/entities/schema"
"github.com/weaviate/weaviate/usecases/auth/authorization"
"github.com/go-openapi/strfmt"
"github.com/weaviate/weaviate/entities/additional"
"github.com/weaviate/weaviate/entities/classcache"
"github.com/weaviate/weaviate/entities/dto"
"github.com/weaviate/weaviate/entities/models"
"github.com/weaviate/weaviate/entities/schema/crossref"
)
// DeleteReferenceInput represents required inputs to delete a reference from an existing object.
type DeleteReferenceInput struct {
// Class name
Class string
// ID of an object
ID strfmt.UUID
// Property name
Property string
// Reference cross reference
Reference models.SingleRef
}
func (m *Manager) DeleteObjectReference(ctx context.Context, principal *models.Principal,
input *DeleteReferenceInput, repl *additional.ReplicationProperties, tenant string,
) *Error {
m.metrics.DeleteReferenceInc()
defer m.metrics.DeleteReferenceDec()
ctx = classcache.ContextWithClassCache(ctx)
input.Class = schema.UppercaseClassName(input.Class)
input.Class, _ = m.resolveAlias(input.Class)
// We are fetching the existing object and get to know if the UUID exists
if err := m.authorizer.Authorize(ctx, principal, authorization.READ, authorization.ShardsData(input.Class, tenant)...); err != nil {
return &Error{err.Error(), StatusForbidden, err}
}
if err := m.authorizer.Authorize(ctx, principal, authorization.UPDATE, authorization.ShardsData(input.Class, tenant)...); err != nil {
return &Error{err.Error(), StatusForbidden, err}
}
deprecatedEndpoint := input.Class == ""
// we need to know which collection an object belongs to, so for the deprecated case we first need to fetch the
// object from any collection, to then know its collection to check for the correct permissions after wards
if deprecatedEndpoint {
if err := m.authorizer.Authorize(ctx, principal, authorization.READ, authorization.CollectionsData()...); err != nil {
return &Error{err.Error(), StatusForbidden, err}
}
res, err := m.getObjectFromRepo(ctx, input.Class, input.ID, additional.Properties{}, nil, tenant)
if err != nil {
errnf := ErrNotFound{}
if errors.As(err, &errnf) {
return &Error{"source object", StatusNotFound, err}
} else if errors.As(err, &ErrMultiTenancy{}) {
return &Error{"source object", StatusUnprocessableEntity, err}
}
return &Error{"source object", StatusInternalServerError, err}
}
input.Class = res.ClassName
}
if err := validateReferenceName(input.Class, input.Property); err != nil {
return &Error{err.Error(), StatusBadRequest, err}
}
class, schemaVersion, _, typedErr := m.getAuthorizedFromClass(ctx, principal, input.Class)
if typedErr != nil {
return typedErr
}
res, err := m.getObjectFromRepo(ctx, input.Class, input.ID, additional.Properties{}, nil, tenant)
if err != nil {
errnf := ErrNotFound{}
if errors.As(err, &errnf) {
return &Error{"source object", StatusNotFound, err}
} else if errors.As(err, &ErrMultiTenancy{}) {
return &Error{"source object", StatusUnprocessableEntity, err}
}
return &Error{"source object", StatusInternalServerError, err}
}
beacon, err := crossref.Parse(input.Reference.Beacon.String())
if err != nil {
return &Error{"cannot parse beacon", StatusBadRequest, err}
}
if input.Class != "" && beacon.Class == "" {
toClass, toBeacon, replace, err := m.autodetectToClass(class, input.Property, beacon)
if err != nil {
return err
}
if replace {
input.Reference.Class = toClass
input.Reference.Beacon = toBeacon
}
}
if err := input.validateSchema(class); err != nil {
if deprecatedEndpoint { // for backward comp reasons
return &Error{"bad inputs deprecated", StatusNotFound, err}
}
if errors.As(err, &ErrMultiTenancy{}) {
return &Error{"bad inputs", StatusUnprocessableEntity, err}
}
return &Error{"bad inputs", StatusBadRequest, err}
}
obj := res.Object()
obj.Tenant = tenant
ok, errmsg := removeReference(obj, input.Property, &input.Reference)
if errmsg != "" {
return &Error{errmsg, StatusInternalServerError, nil}
}
if !ok {
return nil
}
obj.LastUpdateTimeUnix = m.timeSource.Now()
// Ensure that the local schema has caught up to the version we used to validate
if err := m.schemaManager.WaitForUpdate(ctx, schemaVersion); err != nil {
return &Error{
Msg: fmt.Sprintf("error waiting for local schema to catch up to version %d", schemaVersion),
Code: StatusInternalServerError,
Err: err,
}
}
vectors, multiVectors, err := dto.GetVectors(res.Vectors)
if err != nil {
return &Error{"repo.putobject", StatusInternalServerError, fmt.Errorf("cannot get vectors: %w", err)}
}
err = m.vectorRepo.PutObject(ctx, obj, res.Vector, vectors, multiVectors, repl, schemaVersion)
if err != nil {
return &Error{"repo.putobject", StatusInternalServerError, err}
}
if err := m.updateRefVector(ctx, principal, input.Class, input.ID, tenant, class, schemaVersion); err != nil {
return &Error{"update ref vector", StatusInternalServerError, err}
}
return nil
}
func (req *DeleteReferenceInput) validateSchema(class *models.Class) error {
return validateReferenceSchema(class, req.Property)
}
// removeReference removes ref from object obj with property prop.
// It returns ok (removal took place) and an error message
func removeReference(obj *models.Object, prop string, remove *models.SingleRef) (ok bool, errmsg string) {
properties := obj.Properties.(map[string]interface{})
if properties == nil || properties[prop] == nil {
return false, ""
}
refs, ok := properties[prop].(models.MultipleRef)
if !ok {
return false, fmt.Sprintf("property %s of type %T is not a valid cross-reference", prop, refs)
}
var removed bool
properties[prop] = slices.DeleteFunc(refs, func(ref *models.SingleRef) bool {
if ref.Beacon == remove.Beacon {
removed = removed || true
return true
}
return false
})
return removed, ""
}
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