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The Cursor Class | App Engine standard environment for Python 2

The Cursor Class

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The Cursor class provides a cursor in the current set search results, allowing you to retrieve the next set based on criteria that you specify. Using cursors improves the performance and consistency of pagination as indexes are updated.

This API is supported for first-generation runtimes and can be used when upgrading to corresponding second-generation runtimes. If you are updating to the App Engine Python 3 runtime, refer to the migration guide to learn about your migration options for legacy bundled services.

The following shows how to use the cursor to get the next page of results:

# Get the first set of results, and return a cursor with that result set.
# The first cursor tells the API to return cursors in the SearchResults object.
results = index.search(search.Query(query_string='some stuff',
    options=search.QueryOptions(cursor=search.Cursor()))

# Get the next set of results with a cursor.
results = index.search(search.Query(query_string='some stuff',
    options=search.QueryOptions(cursor=results.cursor)))

If you want to continue search from any one of the ScoredDocuments in SearchResults, set Cursor.per_result to True:

# get the first set of results, the first cursor is used to specify
# that cursors are to be returned in the SearchResults.
results = index.search(search.Query(query_string='some stuff',
    options=search.QueryOptions(cursor=Cursor(per_result=True)))

# this shows how to access the per_document cursors returned from a search
per_document_cursor = None
for scored_document in results:
    per_document_cursor = scored_document.cursor

# get the next set of results
results = index.search(search.Query(query_string='some stuff',
    options=search.QueryOptions(cursor=per_document_cursor)))

The cursor can be cached as a web safe string that can be used to reconstruct the Cursor. For example,

next_cursor = results.cursor
next_cursor_url_safe = next_cursor.web_safe_string

// save next_cursor_url_safe
...
// extract next_cursor_url_safe

results = index.search(
    search.Query(query_string,
        cursor=search.Cursor(web_safe_string=next_cursor_url_safe)))
Constructor

The constructor for class Cursor is defined as follows:

class Cursor(web_safe_string=None, per_result=False)

Construct an instance of class Cursor.

Arguments

per_result

When true, returns a cursor per ScoredDocument in SearchResults. When false, returns a single cursor for all of SearchResults. Ignored if using QueryOptions.offset, as the user is responsible for calculating a next offset (if any).

web_safe_string

The cursor string returned from the search service to be interpreted by the search service to get the next set of results.

Result value

A new instance of class Cursor.

Exceptions

ValueError

If the web_safe_string provided by the API is not of required format.

Properties

An instance of class Cursor has the following properties:

per_result

Returns whether to return a cursor for each ScoredDocument in results.

web_safe_string

Returns the cursor string generated by the search service.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-07 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["The `Cursor` class enables retrieving subsequent sets of search results, enhancing pagination performance and consistency."],["Cursors can be used to fetch the next set of results for an entire search query or for individual `ScoredDocuments` within the results."],["The `per_result` argument in the `Cursor` constructor determines if a cursor is provided for each `ScoredDocument` or the entire result set."],["Cursors can be serialized into a web-safe string (`web_safe_string`) for storage and later use to reconstruct the cursor for continued searching."],["The `Cursor` class is applicable for first generation runtimes, and migration options should be reviewed when upgrading to the second-generation runtimes."]]],[]]


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