support loop, loopfix, prefix and postfix for refer type sub field

src/gen/generator.go

@@ -85,6 +85,10 @@ func GenerateForField(field *model.Field,  total int) []string {
 		referField := constant.LoadedFields[arr[0]]
 		referField.Filter = field.Range
 		referField.Format = field.Format
+		referField.Prefix = field.Prefix
+		referField.Postfix = field.Postfix
+		referField.Loop = field.Loop
+		referField.Loopfix = field.Loopfix
 
 		values = GenerateFieldItemsFromDefinition(&referField, total)
 	}

xdoc/data.yaml

@@ -85,11 +85,12 @@ fields:
     fields:
       - name: prefix
         type: list
-        range: "["
+        range: "="
       - name: first_name
         type: address.city
         format: ${seq}-${name}(${state})
         range: select * from address.city where state like '%山东%'
-      - name: postfix
-        type: list
-        range: "]"
+        prefix: '['
+        postfix: "]"
+        loop: 3
+        loopfix: "|"