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

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