feat: attachments by id (#5008)

plugin/filter/common_converter.go

@@ -207,7 +207,7 @@ func (c *CommonSQLConverter) handleInOperator(ctx *ConvertContext, callExpr *exp
 		return err
 	}
 
-	if !slices.Contains([]string{"tag", "visibility", "content_id"}, identifier) {
+	if !slices.Contains([]string{"tag", "visibility", "content_id", "memo_id"}, identifier) {
 		return errors.Errorf("invalid identifier for %s", callExpr.Function)
 	}
 
@@ -226,6 +226,8 @@ func (c *CommonSQLConverter) handleInOperator(ctx *ConvertContext, callExpr *exp
 		return c.handleVisibilityInList(ctx, values)
 	} else if identifier == "content_id" {
 		return c.handleContentIDInList(ctx, values)
+	} else if identifier == "memo_id" {
+		return c.handleMemoIDInList(ctx, values)
 	}
 
 	return nil
@@ -333,6 +335,28 @@ func (c *CommonSQLConverter) handleContentIDInList(ctx *ConvertContext, values [
 	return nil
 }
 
+func (c *CommonSQLConverter) handleMemoIDInList(ctx *ConvertContext, values []any) error {
+	placeholders := []string{}
+	for range values {
+		placeholders = append(placeholders, c.dialect.GetParameterPlaceholder(c.paramIndex))
+		c.paramIndex++
+	}
+
+	tablePrefix := c.dialect.GetTablePrefix("resource")
+	if _, ok := c.dialect.(*PostgreSQLDialect); ok {
+		if _, err := ctx.Buffer.WriteString(fmt.Sprintf("%s.memo_id IN (%s)", tablePrefix, strings.Join(placeholders, ","))); err != nil {
+			return err
+		}
+	} else {
+		if _, err := ctx.Buffer.WriteString(fmt.Sprintf("%s.`memo_id` IN (%s)", tablePrefix, strings.Join(placeholders, ","))); err != nil {
+			return err
+		}
+	}
+
+	ctx.Args = append(ctx.Args, values...)
+	return nil
+}
+
 func (c *CommonSQLConverter) handleContainsOperator(ctx *ConvertContext, callExpr *exprv1.Expr_Call) error {
 	if len(callExpr.Args) != 1 {
 		return errors.Errorf("invalid number of arguments for %s", callExpr.Function)

plugin/filter/filter.go

@@ -46,6 +46,11 @@ var UserFilterCELAttributes = []cel.EnvOption{
 	cel.Variable("username", cel.StringType),
 }
 
+// AttachmentFilterCELAttributes are the CEL attributes for user.
+var AttachmentFilterCELAttributes = []cel.EnvOption{
+	cel.Variable("memo_id", cel.StringType),
+}
+
 // Parse parses the filter string and returns the parsed expression.
 // The filter string should be a CEL expression.
 func Parse(filter string, opts ...cel.EnvOption) (expr *exprv1.ParsedExpr, err error) {

server/router/api/v1/attachment_service.go

@@ -116,7 +116,7 @@ func (s *APIV1Service) CreateAttachment(ctx context.Context, request *v1pb.Creat
 		return nil, status.Errorf(codes.Internal, "failed to create attachment: %v", err)
 	}
 
-	return s.convertAttachmentFromStore(ctx, attachment), nil
+	return convertAttachmentFromStore(attachment), nil
 }
 
 func (s *APIV1Service) ListAttachments(ctx context.Context, request *v1pb.ListAttachmentsRequest) (*v1pb.ListAttachmentsResponse, error) {
@@ -182,7 +182,7 @@ func (s *APIV1Service) ListAttachments(ctx context.Context, request *v1pb.ListAt
 	response := &v1pb.ListAttachmentsResponse{}
 
 	for _, attachment := range attachments {
-		response.Attachments = append(response.Attachments, s.convertAttachmentFromStore(ctx, attachment))
+		response.Attachments = append(response.Attachments, convertAttachmentFromStore(attachment))
 	}
 
 	// For simplicity, set total size to the number of returned attachments.
@@ -209,7 +209,7 @@ func (s *APIV1Service) GetAttachment(ctx context.Context, request *v1pb.GetAttac
 	if attachment == nil {
 		return nil, status.Errorf(codes.NotFound, "attachment not found")
 	}
-	return s.convertAttachmentFromStore(ctx, attachment), nil
+	return convertAttachmentFromStore(attachment), nil
 }
 
 func (s *APIV1Service) GetAttachmentBinary(ctx context.Context, request *v1pb.GetAttachmentBinaryRequest) (*httpbody.HttpBody, error) {
@@ -383,7 +383,7 @@ func (s *APIV1Service) DeleteAttachment(ctx context.Context, request *v1pb.Delet
 	return &emptypb.Empty{}, nil
 }
 
-func (s *APIV1Service) convertAttachmentFromStore(ctx context.Context, attachment *store.Attachment) *v1pb.Attachment {
+func convertAttachmentFromStore(attachment *store.Attachment) *v1pb.Attachment {
 	attachmentMessage := &v1pb.Attachment{
 		Name:       fmt.Sprintf("%s%s", AttachmentNamePrefix, attachment.UID),
 		CreateTime: timestamppb.New(time.Unix(attachment.CreatedTs, 0)),
@@ -391,18 +391,13 @@ func (s *APIV1Service) convertAttachmentFromStore(ctx context.Context, attachmen
 		Type:       attachment.Type,
 		Size:       attachment.Size,
 	}
+	if attachment.MemoUID != nil && *attachment.MemoUID != "" {
+		memoName := fmt.Sprintf("%s%s", MemoNamePrefix, *attachment.MemoUID)
+		attachmentMessage.Memo = &memoName
+	}
 	if attachment.StorageType == storepb.AttachmentStorageType_EXTERNAL || attachment.StorageType == storepb.AttachmentStorageType_S3 {
 		attachmentMessage.ExternalLink = attachment.Reference
 	}
-	if attachment.MemoID != nil {
-		memo, _ := s.Store.GetMemo(ctx, &store.FindMemo{
-			ID: attachment.MemoID,
-		})
-		if memo != nil {
-			memoName := fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID)
-			attachmentMessage.Memo = &memoName
-		}
-	}
 
 	return attachmentMessage
 }

server/router/api/v1/memo_attachment_service.go

@@ -96,7 +96,7 @@ func (s *APIV1Service) ListMemoAttachments(ctx context.Context, request *v1pb.Li
 		Attachments: []*v1pb.Attachment{},
 	}
 	for _, attachment := range attachments {
-		response.Attachments = append(response.Attachments, s.convertAttachmentFromStore(ctx, attachment))
+		response.Attachments = append(response.Attachments, convertAttachmentFromStore(attachment))
 	}
 	return response, nil
 }

server/router/api/v1/memo_service.go

@@ -63,6 +63,9 @@ func (s *APIV1Service) CreateMemo(ctx context.Context, request *v1pb.CreateMemoR
 	if err != nil {
 		return nil, err
 	}
+
+	attachments := []*store.Attachment{}
+
 	if len(request.Memo.Attachments) > 0 {
 		_, err := s.SetMemoAttachments(ctx, &v1pb.SetMemoAttachmentsRequest{
 			Name:        fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID),
@@ -71,6 +74,14 @@ func (s *APIV1Service) CreateMemo(ctx context.Context, request *v1pb.CreateMemoR
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to set memo attachments")
 		}
+
+		a, err := s.Store.ListAttachments(ctx, &store.FindAttachment{
+			MemoID: &memo.ID,
+		})
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to get memo attachments")
+		}
+		attachments = a
 	}
 	if len(request.Memo.Relations) > 0 {
 		_, err := s.SetMemoRelations(ctx, &v1pb.SetMemoRelationsRequest{
@@ -82,7 +93,7 @@ func (s *APIV1Service) CreateMemo(ctx context.Context, request *v1pb.CreateMemoR
 		}
 	}
 
-	memoMessage, err := s.convertMemoFromStore(ctx, memo, []*store.Reaction{})
+	memoMessage, err := s.convertMemoFromStore(ctx, memo, nil, attachments)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to convert memo")
 	}
@@ -190,8 +201,12 @@ func (s *APIV1Service) ListMemos(ctx context.Context, request *v1pb.ListMemosReq
 	reactionMap := make(map[string][]*store.Reaction)
 	memoNames := make([]string, 0, len(memos))
 
+	attachmentMap := make(map[int32][]*store.Attachment)
+	memoIDs := make([]string, 0, len(memos))
+
 	for _, m := range memos {
 		memoNames = append(memoNames, fmt.Sprintf("'%s%s'", MemoNamePrefix, m.UID))
+		memoIDs = append(memoIDs, fmt.Sprintf("'%d'", m.ID))
 	}
 
 	// REACTIONS
@@ -205,9 +220,23 @@ func (s *APIV1Service) ListMemos(ctx context.Context, request *v1pb.ListMemosReq
 		reactionMap[reaction.ContentID] = append(reactionMap[reaction.ContentID], reaction)
 	}
 
+	// ATTACHMENTS
+	attachments, err := s.Store.ListAttachments(ctx, &store.FindAttachment{
+		Filters: []string{fmt.Sprintf("memo_id in [%s]", strings.Join(memoIDs, ", "))},
+	})
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to list attachments")
+	}
+	for _, attachment := range attachments {
+		attachmentMap[*attachment.MemoID] = append(attachmentMap[*attachment.MemoID], attachment)
+	}
+
 	for _, memo := range memos {
-		name := fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID)
-		memoMessage, err := s.convertMemoFromStore(ctx, memo, reactionMap[name])
+		memoName := fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID)
+		reactions := reactionMap[memoName]
+		attachments := attachmentMap[memo.ID]
+
+		memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions, attachments)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to convert memo")
 		}
@@ -256,7 +285,14 @@ func (s *APIV1Service) GetMemo(ctx context.Context, request *v1pb.GetMemoRequest
 		return nil, status.Errorf(codes.Internal, "failed to list reactions")
 	}
 
-	memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions)
+	attachments, err := s.Store.ListAttachments(ctx, &store.FindAttachment{
+		MemoID: &memo.ID,
+	})
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to list attachments")
+	}
+
+	memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions, attachments)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to convert memo")
 	}
@@ -381,8 +417,14 @@ func (s *APIV1Service) UpdateMemo(ctx context.Context, request *v1pb.UpdateMemoR
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to list reactions")
 	}
+	attachments, err := s.Store.ListAttachments(ctx, &store.FindAttachment{
+		MemoID: &memo.ID,
+	})
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to list attachments")
+	}
 
-	memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions)
+	memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions, attachments)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to convert memo")
 	}
@@ -425,7 +467,14 @@ func (s *APIV1Service) DeleteMemo(ctx context.Context, request *v1pb.DeleteMemoR
 		return nil, status.Errorf(codes.Internal, "failed to list reactions")
 	}
 
-	if memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions); err == nil {
+	attachments, err := s.Store.ListAttachments(ctx, &store.FindAttachment{
+		MemoID: &memo.ID,
+	})
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to list attachments")
+	}
+
+	if memoMessage, err := s.convertMemoFromStore(ctx, memo, reactions, attachments); err == nil {
 		// Try to dispatch webhook when memo is deleted.
 		if err := s.DispatchMemoDeletedWebhook(ctx, memoMessage); err != nil {
 			slog.Warn("Failed to dispatch memo deleted webhook", slog.Any("err", err))
@@ -442,10 +491,6 @@ func (s *APIV1Service) DeleteMemo(ctx context.Context, request *v1pb.DeleteMemoR
 	}
 
 	// Delete related attachments.
-	attachments, err := s.Store.ListAttachments(ctx, &store.FindAttachment{MemoID: &memo.ID})
-	if err != nil {
-		return nil, status.Errorf(codes.Internal, "failed to list attachments")
-	}
 	for _, attachment := range attachments {
 		if err := s.Store.DeleteAttachment(ctx, &store.DeleteAttachment{ID: attachment.ID}); err != nil {
 			return nil, status.Errorf(codes.Internal, "failed to delete attachment")
@@ -591,11 +636,13 @@ func (s *APIV1Service) ListMemoComments(ctx context.Context, request *v1pb.ListM
 
 	memoIDToNameMap := make(map[int32]string)
 	memoNamesForQuery := make([]string, 0, len(memos))
+	memoIDsForQuery := make([]string, 0, len(memos))
 
 	for _, memo := range memos {
 		memoName := fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID)
 		memoIDToNameMap[memo.ID] = memoName
 		memoNamesForQuery = append(memoNamesForQuery, fmt.Sprintf("'%s'", memoName))
+		memoIDsForQuery = append(memoIDsForQuery, fmt.Sprintf("'%d'", memo.ID))
 	}
 	reactions, err := s.Store.ListReactions(ctx, &store.FindReaction{
 		Filters: []string{fmt.Sprintf("content_id in [%s]", strings.Join(memoNamesForQuery, ", "))},
@@ -609,12 +656,24 @@ func (s *APIV1Service) ListMemoComments(ctx context.Context, request *v1pb.ListM
 		memoReactionsMap[reaction.ContentID] = append(memoReactionsMap[reaction.ContentID], reaction)
 	}
 
+	attachments, err := s.Store.ListAttachments(ctx, &store.FindAttachment{
+		Filters: []string{fmt.Sprintf("memo_id in [%s]", strings.Join(memoIDsForQuery, ", "))},
+	})
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to list attachments")
+	}
+	attachmentMap := make(map[int32][]*store.Attachment)
+	for _, attachment := range attachments {
+		attachmentMap[*attachment.MemoID] = append(attachmentMap[*attachment.MemoID], attachment)
+	}
+
 	var memosResponse []*v1pb.Memo
 	for _, m := range memos {
 		memoName := memoIDToNameMap[m.ID]
 		reactions := memoReactionsMap[memoName]
+		attachments := attachmentMap[m.ID]
 
-		memoMessage, err := s.convertMemoFromStore(ctx, m, reactions)
+		memoMessage, err := s.convertMemoFromStore(ctx, m, reactions, attachments)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to convert memo")
 		}

server/router/api/v1/memo_service_converter.go

@@ -16,7 +16,7 @@ import (
 	"github.com/usememos/memos/store"
 )
 
-func (s *APIV1Service) convertMemoFromStore(ctx context.Context, memo *store.Memo, reactions []*store.Reaction) (*v1pb.Memo, error) {
+func (s *APIV1Service) convertMemoFromStore(ctx context.Context, memo *store.Memo, reactions []*store.Reaction, attachments []*store.Attachment) (*v1pb.Memo, error) {
 	displayTs := memo.CreatedTs
 	workspaceMemoRelatedSetting, err := s.Store.GetWorkspaceMemoRelatedSetting(ctx)
 	if err != nil {
@@ -62,11 +62,12 @@ func (s *APIV1Service) convertMemoFromStore(ctx context.Context, memo *store.Mem
 	}
 	memoMessage.Relations = listMemoRelationsResponse.Relations
 
-	listMemoAttachmentsResponse, err := s.ListMemoAttachments(ctx, &v1pb.ListMemoAttachmentsRequest{Name: name})
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to list memo attachments")
+	memoMessage.Attachments = []*v1pb.Attachment{}
+
+	for _, attachment := range attachments {
+		attachmentResponse := convertAttachmentFromStore(attachment)
+		memoMessage.Attachments = append(memoMessage.Attachments, attachmentResponse)
 	}
-	memoMessage.Attachments = listMemoAttachmentsResponse.Attachments
 
 	nodes, err := parser.Parse(tokenizer.Tokenize(memo.Content))
 	if err != nil {

store/attachment.go

@@ -35,6 +35,9 @@ type Attachment struct {
 
 	// The related memo ID.
 	MemoID *int32
+
+	// Composed field
+	MemoUID *string
 }
 
 type FindAttachment struct {
@@ -49,6 +52,7 @@ type FindAttachment struct {
 	StorageType    *storepb.AttachmentStorageType
 	Limit          *int
 	Offset         *int
+	Filters        []string
 }
 
 type UpdateAttachment struct {

store/db/mysql/attachment.go

@@ -9,6 +9,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
+	"github.com/usememos/memos/plugin/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )
@@ -48,37 +49,74 @@ func (d *DB) CreateAttachment(ctx context.Context, create *store.Attachment) (*s
 func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([]*store.Attachment, error) {
 	where, args := []string{"1 = 1"}, []any{}
 
+	for _, filterStr := range find.Filters {
+		// Parse filter string and return the parsed expression.
+		// The filter string should be a CEL expression.
+		parsedExpr, err := filter.Parse(filterStr, filter.AttachmentFilterCELAttributes...)
+		if err != nil {
+			return nil, err
+		}
+		convertCtx := filter.NewConvertContext()
+		// ConvertExprToSQL converts the parsed expression to a SQL condition string.
+		converter := filter.NewCommonSQLConverter(&filter.MySQLDialect{})
+		if err := converter.ConvertExprToSQL(convertCtx, parsedExpr.GetExpr()); err != nil {
+			return nil, err
+		}
+		condition := convertCtx.Buffer.String()
+		if condition != "" {
+			where = append(where, fmt.Sprintf("(%s)", condition))
+			args = append(args, convertCtx.Args...)
+		}
+	}
+
 	if v := find.ID; v != nil {
-		where, args = append(where, "`id` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`id` = ?"), append(args, *v)
 	}
 	if v := find.UID; v != nil {
-		where, args = append(where, "`uid` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`uid` = ?"), append(args, *v)
 	}
 	if v := find.CreatorID; v != nil {
-		where, args = append(where, "`creator_id` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`creator_id` = ?"), append(args, *v)
 	}
 	if v := find.Filename; v != nil {
-		where, args = append(where, "`filename` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`filename` = ?"), append(args, *v)
 	}
 	if v := find.FilenameSearch; v != nil {
-		where, args = append(where, "`filename` LIKE ?"), append(args, "%"+*v+"%")
+		where, args = append(where, "`resource`.`filename` LIKE ?"), append(args, "%"+*v+"%")
 	}
 	if v := find.MemoID; v != nil {
-		where, args = append(where, "`memo_id` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`memo_id` = ?"), append(args, *v)
 	}
 	if find.HasRelatedMemo {
-		where = append(where, "`memo_id` IS NOT NULL")
+		where = append(where, "`resource`.`memo_id` IS NOT NULL")
 	}
 	if find.StorageType != nil {
-		where, args = append(where, "`storage_type` = ?"), append(args, find.StorageType.String())
+		where, args = append(where, "`resource`.`storage_type` = ?"), append(args, find.StorageType.String())
+	}
+
+	fields := []string{
+		"`resource`.`id` AS `id`",
+		"`resource`.`uid` AS `uid`",
+		"`resource`.`filename` AS `filename`",
+		"`resource`.`type` AS `type`",
+		"`resource`.`size` AS `size`",
+		"`resource`.`creator_id` AS `creator_id`",
+		"UNIX_TIMESTAMP(`resource`.`created_ts`) AS `created_ts`",
+		"UNIX_TIMESTAMP(`resource`.`updated_ts`) AS `updated_ts`",
+		"`resource`.`memo_id` AS `memo_id`",
+		"`resource`.`storage_type` AS `storage_type`",
+		"`resource`.`reference` AS `reference`",
+		"`resource`.`payload` AS `payload`",
+		"CASE WHEN `memo`.`uid` IS NOT NULL THEN `memo`.`uid` ELSE NULL END AS `memo_uid`",
 	}
-
-	fields := []string{"`id`", "`uid`", "`filename`", "`type`", "`size`", "`creator_id`", "UNIX_TIMESTAMP(`created_ts`)", "UNIX_TIMESTAMP(`updated_ts`)", "`memo_id`", "`storage_type`", "`reference`", "`payload`"}
 	if find.GetBlob {
-		fields = append(fields, "`blob`")
+		fields = append(fields, "`resource`.`blob` AS `blob`")
 	}
 
-	query := fmt.Sprintf("SELECT %s FROM `resource` WHERE %s ORDER BY `updated_ts` DESC", strings.Join(fields, ", "), strings.Join(where, " AND "))
+	query := "SELECT " + strings.Join(fields, ", ") + " FROM `resource`" + " " +
+		"LEFT JOIN `memo` ON `resource`.`memo_id` = `memo`.`id`" + " " +
+		"WHERE " + strings.Join(where, " AND ") + " " +
+		"ORDER BY `updated_ts` DESC"
 	if find.Limit != nil {
 		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
 		if find.Offset != nil {
@@ -111,6 +149,7 @@ func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([
 			&storageType,
 			&attachment.Reference,
 			&payloadBytes,
+			&attachment.MemoUID,
 		}
 		if find.GetBlob {
 			dests = append(dests, &attachment.Blob)

store/db/mysql/attachment_filter_test.go

@@ -0,0 +1,39 @@
+package mysql
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/usememos/memos/plugin/filter"
+)
+
+func TestAttachmentConvertExprToSQL(t *testing.T) {
+	tests := []struct {
+		filter string
+		want   string
+		args   []any
+	}{
+		{
+			filter: `memo_id in ["5atZAj8GcvkSuUA3X2KLaY"]`,
+			want:   "`resource`.`memo_id` IN (?)",
+			args:   []any{"5atZAj8GcvkSuUA3X2KLaY"},
+		},
+		{
+			filter: `memo_id in ["5atZAj8GcvkSuUA3X2KLaY", "4EN8aEpcJ3MaK4ExHTpiTE"]`,
+			want:   "`resource`.`memo_id` IN (?,?)",
+			args:   []any{"5atZAj8GcvkSuUA3X2KLaY", "4EN8aEpcJ3MaK4ExHTpiTE"},
+		},
+	}
+
+	for _, tt := range tests {
+		parsedExpr, err := filter.Parse(tt.filter, filter.AttachmentFilterCELAttributes...)
+		require.NoError(t, err)
+		convertCtx := filter.NewConvertContext()
+		converter := filter.NewCommonSQLConverter(&filter.MySQLDialect{})
+		err = converter.ConvertExprToSQL(convertCtx, parsedExpr.GetExpr())
+		require.NoError(t, err)
+		require.Equal(t, tt.want, convertCtx.Buffer.String())
+		require.Equal(t, tt.args, convertCtx.Args)
+	}
+}

store/db/postgres/attachment.go

@@ -9,6 +9,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
+	"github.com/usememos/memos/plugin/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )
@@ -39,42 +40,77 @@ func (d *DB) CreateAttachment(ctx context.Context, create *store.Attachment) (*s
 func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([]*store.Attachment, error) {
 	where, args := []string{"1 = 1"}, []any{}
 
+	for _, filterStr := range find.Filters {
+		// Parse filter string and return the parsed expression.
+		// The filter string should be a CEL expression.
+		parsedExpr, err := filter.Parse(filterStr, filter.AttachmentFilterCELAttributes...)
+		if err != nil {
+			return nil, err
+		}
+		convertCtx := filter.NewConvertContext()
+		// ConvertExprToSQL converts the parsed expression to a SQL condition string.
+		converter := filter.NewCommonSQLConverter(&filter.PostgreSQLDialect{})
+		if err := converter.ConvertExprToSQL(convertCtx, parsedExpr.GetExpr()); err != nil {
+			return nil, err
+		}
+		condition := convertCtx.Buffer.String()
+		if condition != "" {
+			where = append(where, fmt.Sprintf("(%s)", condition))
+			args = append(args, convertCtx.Args...)
+		}
+	}
+
 	if v := find.ID; v != nil {
-		where, args = append(where, "id = "+placeholder(len(args)+1)), append(args, *v)
+		where, args = append(where, "resource.id = "+placeholder(len(args)+1)), append(args, *v)
 	}
 	if v := find.UID; v != nil {
-		where, args = append(where, "uid = "+placeholder(len(args)+1)), append(args, *v)
+		where, args = append(where, "resource.uid = "+placeholder(len(args)+1)), append(args, *v)
 	}
 	if v := find.CreatorID; v != nil {
-		where, args = append(where, "creator_id = "+placeholder(len(args)+1)), append(args, *v)
+		where, args = append(where, "resource.creator_id = "+placeholder(len(args)+1)), append(args, *v)
 	}
 	if v := find.Filename; v != nil {
-		where, args = append(where, "filename = "+placeholder(len(args)+1)), append(args, *v)
+		where, args = append(where, "resource.filename = "+placeholder(len(args)+1)), append(args, *v)
 	}
 	if v := find.FilenameSearch; v != nil {
-		where, args = append(where, "filename LIKE "+placeholder(len(args)+1)), append(args, fmt.Sprintf("%%%s%%", *v))
+		where, args = append(where, "resource.filename LIKE "+placeholder(len(args)+1)), append(args, fmt.Sprintf("%%%s%%", *v))
 	}
 	if v := find.MemoID; v != nil {
-		where, args = append(where, "memo_id = "+placeholder(len(args)+1)), append(args, *v)
+		where, args = append(where, "resource.memo_id = "+placeholder(len(args)+1)), append(args, *v)
 	}
 	if find.HasRelatedMemo {
-		where = append(where, "memo_id IS NOT NULL")
+		where = append(where, "resource.memo_id IS NOT NULL")
 	}
 	if v := find.StorageType; v != nil {
-		where, args = append(where, "storage_type = "+placeholder(len(args)+1)), append(args, v.String())
+		where, args = append(where, "resource.storage_type = "+placeholder(len(args)+1)), append(args, v.String())
+	}
+
+	fields := []string{
+		"resource.id AS id",
+		"resource.uid AS uid",
+		"resource.filename AS filename",
+		"resource.type AS type",
+		"resource.size AS size",
+		"resource.creator_id AS creator_id",
+		"resource.created_ts AS created_ts",
+		"resource.updated_ts AS updated_ts",
+		"resource.memo_id AS memo_id",
+		"resource.storage_type AS storage_type",
+		"resource.reference AS reference",
+		"resource.payload AS payload",
+		"CASE WHEN memo.uid IS NOT NULL THEN memo.uid ELSE NULL END AS memo_uid",
 	}
-
-	fields := []string{"id", "uid", "filename", "type", "size", "creator_id", "created_ts", "updated_ts", "memo_id", "storage_type", "reference", "payload"}
 	if find.GetBlob {
-		fields = append(fields, "blob")
+		fields = append(fields, "resource.blob AS blob")
 	}
 
 	query := fmt.Sprintf(`
 		SELECT
 			%s
 		FROM resource
+		LEFT JOIN memo ON resource.memo_id = memo.id
 		WHERE %s
-		ORDER BY updated_ts DESC
+		ORDER BY resource.updated_ts DESC
 	`, strings.Join(fields, ", "), strings.Join(where, " AND "))
 	if find.Limit != nil {
 		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
@@ -108,6 +144,7 @@ func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([
 			&storageType,
 			&attachment.Reference,
 			&payloadBytes,
+			&attachment.MemoUID,
 		}
 		if find.GetBlob {
 			dests = append(dests, &attachment.Blob)

store/db/postgres/attachment_filter_test.go

@@ -0,0 +1,39 @@
+package postgres
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/usememos/memos/plugin/filter"
+)
+
+func TestAttachmentConvertExprToSQL(t *testing.T) {
+	tests := []struct {
+		filter string
+		want   string
+		args   []any
+	}{
+		{
+			filter: `memo_id in ["5atZAj8GcvkSuUA3X2KLaY"]`,
+			want:   "resource.memo_id IN ($1)",
+			args:   []any{"5atZAj8GcvkSuUA3X2KLaY"},
+		},
+		{
+			filter: `memo_id in ["5atZAj8GcvkSuUA3X2KLaY", "4EN8aEpcJ3MaK4ExHTpiTE"]`,
+			want:   "resource.memo_id IN ($1,$2)",
+			args:   []any{"5atZAj8GcvkSuUA3X2KLaY", "4EN8aEpcJ3MaK4ExHTpiTE"},
+		},
+	}
+
+	for _, tt := range tests {
+		parsedExpr, err := filter.Parse(tt.filter, filter.AttachmentFilterCELAttributes...)
+		require.NoError(t, err)
+		convertCtx := filter.NewConvertContext()
+		converter := filter.NewCommonSQLConverter(&filter.PostgreSQLDialect{})
+		err = converter.ConvertExprToSQL(convertCtx, parsedExpr.GetExpr())
+		require.NoError(t, err)
+		require.Equal(t, tt.want, convertCtx.Buffer.String())
+		require.Equal(t, tt.args, convertCtx.Args)
+	}
+}

store/db/sqlite/attachment.go

@@ -9,6 +9,7 @@ import (
 	"github.com/pkg/errors"
 	"google.golang.org/protobuf/encoding/protojson"
 
+	"github.com/usememos/memos/plugin/filter"
 	storepb "github.com/usememos/memos/proto/gen/store"
 	"github.com/usememos/memos/store"
 )
@@ -41,37 +42,74 @@ func (d *DB) CreateAttachment(ctx context.Context, create *store.Attachment) (*s
 func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([]*store.Attachment, error) {
 	where, args := []string{"1 = 1"}, []any{}
 
+	for _, filterStr := range find.Filters {
+		// Parse filter string and return the parsed expression.
+		// The filter string should be a CEL expression.
+		parsedExpr, err := filter.Parse(filterStr, filter.AttachmentFilterCELAttributes...)
+		if err != nil {
+			return nil, err
+		}
+		convertCtx := filter.NewConvertContext()
+		// ConvertExprToSQL converts the parsed expression to a SQL condition string.
+		converter := filter.NewCommonSQLConverter(&filter.SQLiteDialect{})
+		if err := converter.ConvertExprToSQL(convertCtx, parsedExpr.GetExpr()); err != nil {
+			return nil, err
+		}
+		condition := convertCtx.Buffer.String()
+		if condition != "" {
+			where = append(where, fmt.Sprintf("(%s)", condition))
+			args = append(args, convertCtx.Args...)
+		}
+	}
+
 	if v := find.ID; v != nil {
-		where, args = append(where, "`id` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`id` = ?"), append(args, *v)
 	}
 	if v := find.UID; v != nil {
-		where, args = append(where, "`uid` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`uid` = ?"), append(args, *v)
 	}
 	if v := find.CreatorID; v != nil {
-		where, args = append(where, "`creator_id` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`creator_id` = ?"), append(args, *v)
 	}
 	if v := find.Filename; v != nil {
-		where, args = append(where, "`filename` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`filename` = ?"), append(args, *v)
 	}
 	if v := find.FilenameSearch; v != nil {
-		where, args = append(where, "`filename` LIKE ?"), append(args, fmt.Sprintf("%%%s%%", *v))
+		where, args = append(where, "`resource`.`filename` LIKE ?"), append(args, fmt.Sprintf("%%%s%%", *v))
 	}
 	if v := find.MemoID; v != nil {
-		where, args = append(where, "`memo_id` = ?"), append(args, *v)
+		where, args = append(where, "`resource`.`memo_id` = ?"), append(args, *v)
 	}
 	if find.HasRelatedMemo {
-		where = append(where, "`memo_id` IS NOT NULL")
+		where = append(where, "`resource`.`memo_id` IS NOT NULL")
 	}
 	if find.StorageType != nil {
-		where, args = append(where, "`storage_type` = ?"), append(args, find.StorageType.String())
+		where, args = append(where, "`resource`.`storage_type` = ?"), append(args, find.StorageType.String())
+	}
+
+	fields := []string{
+		"`resource`.`id` AS `id`",
+		"`resource`.`uid` AS `uid`",
+		"`resource`.`filename` AS `filename`",
+		"`resource`.`type` AS `type`",
+		"`resource`.`size` AS `size`",
+		"`resource`.`creator_id` AS `creator_id`",
+		"`resource`.`created_ts` AS `created_ts`",
+		"`resource`.`updated_ts` AS `updated_ts`",
+		"`resource`.`memo_id` AS `memo_id`",
+		"`resource`.`storage_type` AS `storage_type`",
+		"`resource`.`reference` AS `reference`",
+		"`resource`.`payload` AS `payload`",
+		"CASE WHEN `memo`.`uid` IS NOT NULL THEN `memo`.`uid` ELSE NULL END AS `memo_uid`",
 	}
-
-	fields := []string{"`id`", "`uid`", "`filename`", "`type`", "`size`", "`creator_id`", "`created_ts`", "`updated_ts`", "`memo_id`", "`storage_type`", "`reference`", "`payload`"}
 	if find.GetBlob {
-		fields = append(fields, "`blob`")
+		fields = append(fields, "`resource`.`blob` AS `blob`")
 	}
 
-	query := fmt.Sprintf("SELECT %s FROM `resource` WHERE %s ORDER BY `updated_ts` DESC", strings.Join(fields, ", "), strings.Join(where, " AND "))
+	query := "SELECT " + strings.Join(fields, ", ") + " FROM `resource`" + " " +
+		"LEFT JOIN `memo` ON `resource`.`memo_id` = `memo`.`id`" + " " +
+		"WHERE " + strings.Join(where, " AND ") + " " +
+		"ORDER BY `resource`.`updated_ts` DESC"
 	if find.Limit != nil {
 		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
 		if find.Offset != nil {
@@ -104,6 +142,7 @@ func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([
 			&storageType,
 			&attachment.Reference,
 			&payloadBytes,
+			&attachment.MemoUID,
 		}
 		if find.GetBlob {
 			dests = append(dests, &attachment.Blob)

store/db/sqlite/attachment_filter_test.go

@@ -0,0 +1,39 @@
+package sqlite
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/usememos/memos/plugin/filter"
+)
+
+func TestAttachmentConvertExprToSQL(t *testing.T) {
+	tests := []struct {
+		filter string
+		want   string
+		args   []any
+	}{
+		{
+			filter: `memo_id in ["5atZAj8GcvkSuUA3X2KLaY"]`,
+			want:   "`resource`.`memo_id` IN (?)",
+			args:   []any{"5atZAj8GcvkSuUA3X2KLaY"},
+		},
+		{
+			filter: `memo_id in ["5atZAj8GcvkSuUA3X2KLaY", "4EN8aEpcJ3MaK4ExHTpiTE"]`,
+			want:   "`resource`.`memo_id` IN (?,?)",
+			args:   []any{"5atZAj8GcvkSuUA3X2KLaY", "4EN8aEpcJ3MaK4ExHTpiTE"},
+		},
+	}
+
+	for _, tt := range tests {
+		parsedExpr, err := filter.Parse(tt.filter, filter.AttachmentFilterCELAttributes...)
+		require.NoError(t, err)
+		convertCtx := filter.NewConvertContext()
+		converter := filter.NewCommonSQLConverter(&filter.SQLiteDialect{})
+		err = converter.ConvertExprToSQL(convertCtx, parsedExpr.GetExpr())
+		require.NoError(t, err)
+		require.Equal(t, tt.want, convertCtx.Buffer.String())
+		require.Equal(t, tt.args, convertCtx.Args)
+	}
+}