#399

backend/app/controllers/post_imports_controller.rb

@@ -70,8 +70,15 @@ class PostImportsController < ApplicationController
     end
     raise ArgumentError, '解析結果が大きすぎます．' if rows.sum { Array(_1['values']).sum(&:bytesize) } > PostImportSourceParser::MAX_BYTES
 
-    { columns: columns.map { |column| column.slice('key', 'label') },
-      rows: rows.map { |row| { source_row: row['source_row'], values: Array(row['values']) } } }
+    parsed_rows = rows.map do |row|
+      source_row = Integer(row['source_row'], exception: false)
+      raise ArgumentError, '元行番号が不正です．' if source_row.nil? || source_row <= 0
+
+      { source_row:, values: Array(row['values']) }
+    end
+    raise ArgumentError, '元行番号が重複しています．' if parsed_rows.map { _1[:source_row] }.uniq.length != parsed_rows.length
+
+    { columns: columns.map { |column| column.slice('key', 'label') }, rows: parsed_rows }
   end
 
   def validate_rows_params