fix: 解决each_method的逻辑错误

lib/tallty_import_export/export.rb

@@ -65,7 +65,7 @@ module TalltyImportExport
       end
     end
 
-    def export_workbook workbook, records
+    def export_workbook workbook, association_records
       # excel导出样式
       alignment = { vertical: :center, horizontal: :center }
       border    = { color: '969696', style: :thin }
@@ -89,10 +89,13 @@ module TalltyImportExport
         merge_column_hash = {}
         first_content_row_index = respond_to?(:first_header) ? 2 : 1
 
-        each_method = @each_method || :each
-        records.try_method(each_method).with_index do |record, index|
+        index = 0
+        association_records.each do |association_record|
           row = []
           headers.each_with_index do |header, col_index|
+            records = @each_method.present? ? association_record.try_method(@each_method) : [association_record]
+            records.each do |record|
+              index += 1
               _data = handle_data(record, header, index)
               if header[:merge].present? && last_row.present? && _data == last_row[col_index]
                 # 这里使用二维数组，每个数组里都是列内容相同的各行
@@ -109,6 +112,7 @@ module TalltyImportExport
             sheet.add_row row, style: title3, height: @row_height, types: headers.map{|header| header[:format]&.to_sym}
             last_row = row
           end
+        end
         # 需要根据column进行多行的内容合并
         if merge_column_hash.present?
           merge_column_hash.each do |col_index, row_arr|