rails - find_by_sql：错误的参数个数（2个为1）

Question

获取wrong number of arguments (2 for 1)以下代码......任何想法？

@user_industry = current_user.industry

@industries = Listing.find_by_sql("SELECT * FROM listings WHERE industry = ?", @user_industry)

Answer 1

您必须使用与AR find

相同的字符串替换

Listing.find_by_sql(["SELECT * FROM listings WHERE industry = ?", @user_industry])

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