Mongo.getReadPrefMode()

Mongo.getReadPrefMode()

Returns:返回：	The current read preference mode for the Mongo() connection object.Mongo()连接对象的当前读取首选模式。

See Read Preference for an introduction to read preferences in MongoDB. 有关MongoDB中读取首选项的介绍，请参阅读取首选项。Use getReadPrefMode() to return the current read preference mode, as in the following example:使用getReadPrefMode()返回当前的读取首选项模式，如下例所示：

db.getMongo().getReadPrefMode()

Use the following operation to return and print the current read preference mode:使用以下操作返回并打印当前读取首选项模式：

print(db.getMongo().getReadPrefMode());

This operation will return one of the following read preference modes:此操作将返回以下读取首选项模式之一：

• primary
• primaryPreferred
• secondary
• secondaryPreferred
• nearest

Tip

See also: 另请参阅：

• Read Preference
• readPref()
• setReadPref()
• getReadPrefTagSet()