PG :: InvalidTextRepresentation：错误：整数的无效输入语法

Question

我正在使用Rails上的预备语句进行“ IN”查询。 我收到PG :: InvalidTextRepresentation错误。

代码：

def mark_ineligible(match_ids)
  ids = match_ids.join(", ")
  result = epr("mark_matches_as_ineligible",
               "UPDATE matches SET is_eligibile=false WHERE id IN ( $1 )",
               [ids])
end

def epr(statementname, statement, params)
  connection = ActiveRecord::Base.connection.raw_connection
  begin
    result = connection.exec_prepared(statementname, params)
    return result
  rescue PG::InvalidSqlStatementName => e
    begin
      connection.prepare(statementname, statement)
    rescue PG::DuplicatePstatement => e
      # ignore since the prepared statement already exists
    end
    result = connection.exec_prepared(statementname, params)
    return result
  end
end

尝试使用以下方法调用此方法：

match_ids = [42, 43]
mark_ineligible match_ids
PG::InvalidTextRepresentation: ERROR:  invalid input syntax for integer: "42, 43"

    from (irb):24:in `exec_prepared'
    from (irb):24:in `rescue in epr'
    from (irb):15:in `epr'
    from (irb):8:in `mark_ineligible'
    from (irb):35

请在这里帮助。 我想知道为什么会出现此错误以及如何解决。

谢谢，

Answer 1

mark_ineligible应该如下所示：

def mark_ineligible(match_ids)
    result = epr("mark_matches_as_ineligible",
           "UPDATE matches SET is_eligibile=false WHERE id IN ( $1 )", match_ids)
end

当您调用mark_ineligible ，将一个数组作为参数传递：

mark_ineligible(match_ids)  #=>match_ids = [42,43]