小编Mar*_*ven的帖子

运行此代码时,我收到一个非常奇怪的JavaScript错误:

<script type = 'text/javascript'>
var ask = confirm('".$message."');
if (ask == false)
{
    return false;     
}

else
{
    return true;
}
</script>

在JavaScript控制台中,它说:

Syntax Error: Illegal return statement

它发生在return true;和return false;

(我从php函数回应这个javascript; $message变量是php参数之一)

我的代码出了什么问题？

为了防止我的数据库变得太大,我希望sqlite只插入尚未插入的值.我做了一些搜索,并认为最好的方法是使用UNIQUE约束.在我看来,当插入一个非UNIQUE的值时,sqlite会崩溃,我该如何规避这个错误并继续下一次提交呢？

以下是一些相关代码.

sql = sqlite3.connect('submissions.db')
cur = sql.cursor()
cur.execute('CREATE TABLE IF NOT EXISTS some_table(id TEXT UNIQUE)')
sql.commit()

for thing in things:
    try:
        # Do some stuff
    except AttributeError:
        pass

    cur.execute('INSERT INTO some_table VALUES(?)', [thing])
    sql.commit()

这是追溯:

Traceback (most recent call last):
  File "D:\Directory\Python\Projects\Oddshotcrawler for Reddit, globaloffensive\oddshotcrawler.py", line 62, in <module>
    oddshotcrawler()
  File "D:\Directory\Python\Projects\Oddshotcrawler for Reddit, globaloffensive\oddshotcrawler.py", line 54, in oddshotcrawler
    cur.execute('INSERT INTO oldposts VALUES(?)', [thing])
sqlite3.IntegrityError: UNIQUE constraint failed: some_table.id
[Finished in 7.1s with exit code 1]