插入HTML到MySQL数据库显示类型错误
我正在开发一个Web应用程序使用Flask。在某些时候,我必须插入某些HTML脚本到MySQL数据库:插入HTML到MySQL数据库显示类型错误
<h3>Welcome!</h3> <p>Some text</p>
当我将其插入到数据库中(当它被瓶中的“render_template”函数返回):
\n\n<h3>Welcome!</h3>\n\n\n\n<p>Some text</p>
我得到以下错误:
TypeError: ProgrammingError(1064, "You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '\\\\\\\\n\\\\n<h3>Welcome!</h3>\\\\n\\\\n\\\\n\\\\n<p>Some text' at line 1") is not JSON serializable
我第一次不明白什么JSON序列化“的意思,我想知道我做错了。我已经尝试脱线(\n
),但它仍然显示相同的错误。为什么?我很感谢你能提供的任何答案。
回答:
编写HTML时数据库通常用于甲解决方案:
1)简单地转换数据库字段类型成团块这样它将接受二进制数据,然后编码HTML为二进制(下面例子)。 2)将数据库字段保留为文本字段,但base64对数据进行编码,以便数据库不会抱怨非法字符。
# Example for case 1. # Note that you need to make sure the database field is a blob:
html = '<h3>Welcome!</h3>\n<p>Some text</p>'
bin = html.encode()
dbhandle.execute('INSERT INTO script (various fields, binhtml) VALUES (..., bin)')
# When you read back the data, remember to decode.
dbhandle.execute('SELECT binhtml FROM script WHERE...')
resultset = dbhandle.fetchall()
htmlresult = resultset.decode()
# Example for case 2.
# Database field can be a text/varchar type because base64 ensures it will work.
import base64
html = '<h3>Welcome!</h3>\n<p>Some text</p>'
# Convert HTML into base64 encoded *text* so it can be stored in text field.
encoded = base64.b64decode(html.encode()).decode()
# Do the database INSERT.
...
# Retrieve the stored text from the database and convert back to HTML
dbhandle.execute('SELECT encodedhtml FROM script WHERE...')
resultset = dbhandle.fetchall()
htmlresult = base64.b64decode(resultset).decode()
以上是 插入HTML到MySQL数据库显示类型错误 的全部内容, 来源链接: utcz.com/qa/265159.html