How to set Chinese in mongodb

MongoDB can support Chinese through the following steps: create a UTF-8 encoding database, set UTF-8 encoding as the default encoding, restart MongoDB, insert Chinese records, verify Chinese support, and limit the display length if necessary.

How to set up Chinese support for MongoDB

Introduction:

MongoDB is a popular NoSQL database that does not provide Chinese support by default. However, the database configuration can be modified to support Chinese.

Steps:

1. Create UTF-8 encoding database:

<code>db.createCollection("中文集合", { collation: { locale: "zh" } })</code>

2. Convert UTF- 8 encoding as the default encoding:

Add the following line in the mongodb.conf configuration file:

<code>collation: zh</code>

3. Restart MongoDB:

<code>sudo service mongod restart</code>

4. Verify Chinese support:

Insert a Chinese record in the collection:

<code>db.中文集合.insert({ name: "张三" })</code>

Use find() Method query record:

<code>db.中文集合.find({ name: "张三" })</code>

5. Limit the display length of Chinese characters:

If the length of Chinese characters is too long, you can limit the display length:

<code>db.中文集合.find({ name: "张三" }, { name: { $regex: /^.{0,12}$/ } })</code>

This regular expression limits the display length of Chinese characters to 12.

Tip:

• Make sure that both the client and server character sets are set to UTF-8.
• For an existing database, you can use the db.adminCommand({ setParameter: 1, parameters: { collation: 'zh' } }) command to convert it to UTF-8 encoding.

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