Add support for removing custom field keys

graphql/schema/types/metadata.graphql

@@ -344,4 +344,6 @@ input CustomFieldsInput {
   full: Map
   "If populated, only the keys in this map will be updated"
   partial: Map
+  "Remove any keys in this list"
+  remove: [String!]
 }

internal/api/custom_fields.go

@@ -0,0 +1,12 @@
+package api
+
+import "github.com/stashapp/stash/pkg/models"
+
+func handleUpdateCustomFields(input models.CustomFieldsInput) models.CustomFieldsInput {
+	ret := input
+	// convert json.Numbers to int/float
+	ret.Full = convertMapJSONNumbers(ret.Full)
+	ret.Partial = convertMapJSONNumbers(ret.Partial)
+
+	return ret
+}

internal/api/resolver_mutation_performer.go

@@ -297,10 +297,7 @@ func (r *mutationResolver) PerformerUpdate(ctx context.Context, input models.Per
 		return nil, fmt.Errorf("converting tag ids: %w", err)
 	}
 
-	updatedPerformer.CustomFields = input.CustomFields
-	// convert json.Numbers to int/float
-	updatedPerformer.CustomFields.Full = convertMapJSONNumbers(updatedPerformer.CustomFields.Full)
-	updatedPerformer.CustomFields.Partial = convertMapJSONNumbers(updatedPerformer.CustomFields.Partial)
+	updatedPerformer.CustomFields = handleUpdateCustomFields(input.CustomFields)
 
 	var imageData []byte
 	imageIncluded := translator.hasField("image")
@@ -417,6 +414,10 @@ func (r *mutationResolver) BulkPerformerUpdate(ctx context.Context, input BulkPe
 		return nil, fmt.Errorf("converting tag ids: %w", err)
 	}
 
+	if input.CustomFields != nil {
+		updatedPerformer.CustomFields = handleUpdateCustomFields(*input.CustomFields)
+	}
+
 	ret := []*models.Performer{}
 
 	// Start the transaction and save the performers

pkg/models/custom_fields.go

@@ -9,6 +9,8 @@ type CustomFieldsInput struct {
 	Full map[string]interface{} `json:"full"`
 	// If populated, only the keys in this map will be updated
 	Partial map[string]interface{} `json:"partial"`
+	// Remove any keys in this list
+	Remove []string `json:"remove"`
 }
 
 type CustomFieldsReader interface {

pkg/sqlite/custom_fields.go

@@ -41,18 +41,31 @@ func (s *customFieldsStore) SetCustomFields(ctx context.Context, id int, values
 	case values.Partial != nil:
 		partial = true
 		valMap = values.Partial
-	default:
-		return nil
 	}
 
-	if err := s.validateCustomFields(valMap); err != nil {
+	if valMap != nil {
+		if err := s.validateCustomFields(valMap, values.Remove); err != nil {
+			return err
+		}
+
+		if err := s.setCustomFields(ctx, id, valMap, partial); err != nil {
+			return err
+		}
+	}
+
+	if err := s.deleteCustomFields(ctx, id, values.Remove); err != nil {
 		return err
 	}
 
-	return s.setCustomFields(ctx, id, valMap, partial)
+	return nil
 }
 
-func (s *customFieldsStore) validateCustomFields(values map[string]interface{}) error {
+func (s *customFieldsStore) validateCustomFields(values map[string]interface{}, deleteKeys []string) error {
+	// if values is nil, nothing to validate
+	if values == nil {
+		return nil
+	}
+
 	// ensure that custom field names are valid
 	// no leading or trailing whitespace, no empty strings
 	for k := range values {
@@ -61,6 +74,13 @@ func (s *customFieldsStore) validateCustomFields(values map[string]interface{})
 		}
 	}
 
+	// ensure delete keys are not also in values
+	for _, k := range deleteKeys {
+		if _, ok := values[k]; ok {
+			return fmt.Errorf("custom field name %q cannot be in both values and delete keys", k)
+		}
+	}
+
 	return nil
 }
 
@@ -130,6 +150,22 @@ func (s *customFieldsStore) setCustomFields(ctx context.Context, id int, values
 	return nil
 }
 
+func (s *customFieldsStore) deleteCustomFields(ctx context.Context, id int, keys []string) error {
+	if len(keys) == 0 {
+		return nil
+	}
+
+	q := dialect.Delete(s.table).
+		Where(s.fk.Eq(id)).
+		Where(goqu.I("field").In(keys))
+
+	if _, err := exec(ctx, q); err != nil {
+		return fmt.Errorf("deleting custom fields: %w", err)
+	}
+
+	return nil
+}
+
 func (s *customFieldsStore) GetCustomFields(ctx context.Context, id int) (map[string]interface{}, error) {
 	q := dialect.Select("field", "value").From(s.table).Where(s.fk.Eq(id))
 

pkg/sqlite/custom_fields_test.go

@@ -64,6 +64,18 @@ func TestSetCustomFields(t *testing.T) {
 			}),
 			false,
 		},
+		{
+			"valid remove",
+			models.CustomFieldsInput{
+				Remove: []string{"real"},
+			},
+			func() map[string]interface{} {
+				m := getPerformerCustomFields(performerIdx)
+				delete(m, "real")
+				return m
+			}(),
+			false,
+		},
 		{
 			"leading space full",
 			models.CustomFieldsInput{
@@ -144,16 +156,38 @@ func TestSetCustomFields(t *testing.T) {
 			nil,
 			true,
 		},
+		{
+			"invalid remove full",
+			models.CustomFieldsInput{
+				Full: map[string]interface{}{
+					"key": "value",
+				},
+				Remove: []string{"key"},
+			},
+			nil,
+			true,
+		},
+		{
+			"invalid remove partial",
+			models.CustomFieldsInput{
+				Partial: map[string]interface{}{
+					"real": float64(4.56),
+				},
+				Remove: []string{"real"},
+			},
+			nil,
+			true,
+		},
 	}
 
 	// use performer custom fields store
 	store := db.Performer
 	id := performerIDs[performerIdx]
 
-	assert := assert.New(t)
-
 	for _, tt := range tests {
 		runWithRollbackTxn(t, tt.name, func(t *testing.T, ctx context.Context) {
+			assert := assert.New(t)
+
 			err := store.SetCustomFields(ctx, id, tt.input)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("SetCustomFields() error = %v, wantErr %v", err, tt.wantErr)