diff --git a/kernel/av/table.go b/kernel/av/table.go
index 69b161efe..50f47e4d6 100644
--- a/kernel/av/table.go
+++ b/kernel/av/table.go
@@ -591,19 +591,31 @@ func (value *Value) CompareOperator(other *Value, operator FilterOperator) bool
 	if nil != value.Relation && nil != other.Relation {
 		switch operator {
 		case FilterOperatorContains:
-			if "" == strings.TrimSpace(other.Relation.Content) {
-				return true
+			contains := false
+			for _, c := range value.Relation.Contents {
+				for _, c1 := range other.Relation.Contents {
+					if c == c1 {
+						contains = true
+						break
+					}
+				}
 			}
-			return strings.Contains(value.Relation.Content, other.Relation.Content)
+			return contains
 		case FilterOperatorDoesNotContain:
-			if "" == strings.TrimSpace(other.Relation.Content) {
-				return true
+			contains := false
+			for _, c := range value.Relation.Contents {
+				for _, c2 := range other.Relation.Contents {
+					if c == c2 {
+						contains = true
+						break
+					}
+				}
 			}
-			return !strings.Contains(value.Relation.Content, other.Relation.Content)
+			return !contains
 		case FilterOperatorIsEmpty:
-			return "" == strings.TrimSpace(value.Relation.Content)
+			return 0 == len(value.Relation.Contents) || 1 == len(value.Relation.Contents) && "" == value.Relation.Contents[0]
 		case FilterOperatorIsNotEmpty:
-			return "" != strings.TrimSpace(value.Relation.Content)
+			return 0 != len(value.Relation.Contents) && !(1 == len(value.Relation.Contents) && "" == value.Relation.Contents[0])
 		}
 	}
 
diff --git a/kernel/av/value.go b/kernel/av/value.go
index d3f0cac44..73015cbda 100644
--- a/kernel/av/value.go
+++ b/kernel/av/value.go
@@ -142,10 +142,14 @@ func (value *Value) String() string {
 		}
 		return ""
 	case KeyTypeRelation:
-		if nil == value.Relation {
+		if 1 > len(value.Relation.Contents) {
 			return ""
 		}
-		return value.Relation.Content
+		var ret []string
+		for _, v := range value.Relation.Contents {
+			ret = append(ret, v)
+		}
+		return strings.Join(ret, " ")
 	case KeyTypeRollup:
 		if nil == value.Rollup {
 			return ""
@@ -463,7 +467,7 @@ type ValueCheckbox struct {
 }
 
 type ValueRelation struct {
-	Content  string   `json:"content"`
+	Contents []string `json:"contents"`
 	BlockIDs []string `json:"blockIDs"`
 }