fix: support json with prefix try_method

lib/tallty_import_export/export.rb

@@ -189,12 +189,10 @@ module TalltyImportExport
           send(header[:method], record, header)
         elsif header[:chain].present?
           try_chain(record, header[:chain])
-        elsif header[:json]
-          record.send(header[:json])[header[:key]]
         elsif header[:proc] && header[:proc].respond_to?(:call)
           header[:proc].call(record, context)
         else
-          try_method(record, header[:key])
+          try_method(record, header[:key], prefix: header[:json])
         end
       data = handle_format(data, header)
       data = handle_data_type(data)
@@ -207,9 +205,10 @@ module TalltyImportExport
       arr.reduce(record) { |r, m| r.try(:[], m) || r.try(:[], m.to_sym) || r.try(m)  }
     end
 
-    def try_method record, method
+    def try_method record, method, prefix: nil
       arr = method.to_s.split(/\./)
-      try_chain record, arr
+      prefix_arr = prefix.to_s.split(/\./)
+      try_chain record, arr + arr1
     end
 
     # 根据数据类型 attr_type 进行数据的格式化