diff --git a/database/accessor/accessor-json-bytes.go b/database/accessor/accessor-json-bytes.go
index 3115bf6..f8a6923 100644
--- a/database/accessor/accessor-json-bytes.go
+++ b/database/accessor/accessor-json-bytes.go
@@ -1,8 +1,6 @@
 package accessor
 
 import (
-	"fmt"
-
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
 )
@@ -23,23 +21,9 @@ func NewJSONBytesAccessor(json *[]byte) *JSONBytesAccessor {
 func (ja *JSONBytesAccessor) Set(key string, value interface{}) error {
 	result := gjson.GetBytes(*ja.json, key)
 	if result.Exists() {
-		switch value.(type) {
-		case string:
-			if result.Type != gjson.String {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
-		case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64:
-			if result.Type != gjson.Number {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
-		case bool:
-			if result.Type != gjson.True && result.Type != gjson.False {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
-		case []string:
-			if !result.IsArray() {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
+		err := checkJSONValueType(result, key, value)
+		if err != nil {
+			return err
 		}
 	}
 
diff --git a/database/accessor/accessor-json-string.go b/database/accessor/accessor-json-string.go
index c5c215d..b6e8025 100644
--- a/database/accessor/accessor-json-string.go
+++ b/database/accessor/accessor-json-string.go
@@ -23,23 +23,9 @@ func NewJSONAccessor(json *string) *JSONAccessor {
 func (ja *JSONAccessor) Set(key string, value interface{}) error {
 	result := gjson.Get(*ja.json, key)
 	if result.Exists() {
-		switch value.(type) {
-		case string:
-			if result.Type != gjson.String {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
-		case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64:
-			if result.Type != gjson.Number {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
-		case bool:
-			if result.Type != gjson.True && result.Type != gjson.False {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
-		case []string:
-			if !result.IsArray() {
-				return fmt.Errorf("tried to set field %s (%s) to a %T value", key, result.Type.String(), value)
-			}
+		err := checkJSONValueType(result, key, value)
+		if err != nil {
+			return err
 		}
 	}
 
@@ -51,6 +37,28 @@ func (ja *JSONAccessor) Set(key string, value interface{}) error {
 	return nil
 }
 
+func checkJSONValueType(jsonValue gjson.Result, key string, value interface{}) error {
+	switch value.(type) {
+	case string:
+		if jsonValue.Type != gjson.String {
+			return fmt.Errorf("tried to set field %s (%s) to a %T value", key, jsonValue.Type.String(), value)
+		}
+	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, float32, float64:
+		if jsonValue.Type != gjson.Number {
+			return fmt.Errorf("tried to set field %s (%s) to a %T value", key, jsonValue.Type.String(), value)
+		}
+	case bool:
+		if jsonValue.Type != gjson.True && jsonValue.Type != gjson.False {
+			return fmt.Errorf("tried to set field %s (%s) to a %T value", key, jsonValue.Type.String(), value)
+		}
+	case []string:
+		if !jsonValue.IsArray() {
+			return fmt.Errorf("tried to set field %s (%s) to a %T value", key, jsonValue.Type.String(), value)
+		}
+	}
+	return nil
+}
+
 // Get returns the value found by the given json key and whether it could be successfully extracted.
 func (ja *JSONAccessor) Get(key string) (value interface{}, ok bool) {
 	result := gjson.Get(*ja.json, key)
diff --git a/database/accessor/accessor-struct.go b/database/accessor/accessor-struct.go
index 6f245aa..c13072b 100644
--- a/database/accessor/accessor-struct.go
+++ b/database/accessor/accessor-struct.go
@@ -160,10 +160,7 @@ func (sa *StructAccessor) GetBool(key string) (value bool, ok bool) {
 // Exists returns the whether the given key exists.
 func (sa *StructAccessor) Exists(key string) bool {
 	field := sa.object.FieldByName(key)
-	if field.IsValid() {
-		return true
-	}
-	return false
+	return field.IsValid()
 }
 
 // Type returns the accessor type as a string.
diff --git a/database/accessor/accessor_test.go b/database/accessor/accessor_test.go
index 9190818..3d6d5bb 100644
--- a/database/accessor/accessor_test.go
+++ b/database/accessor/accessor_test.go
@@ -1,3 +1,4 @@
+//nolint:maligned,unparam
 package accessor
 
 import (