cursor.readPref()¶

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Definition¶

cursor.readPref(mode, tagSet)¶

Append readPref() to a cursor to control how the client routes the query to members of the replica set.

Parameter	Type	Description
`mode`	string	One of the following read preference modes: `primary`, `primaryPreferred`, `secondary`, `secondaryPreferred`, or `nearest`
`tagSet`	array	Optional. A tag set used to specify custom read preference modes. For details, see Tag Sets.

Note

You must apply readPref() to the cursor before retrieving any documents from the database.

← cursor.readConcern() cursor.returnKey() →