Row key definition based on fields from the message.
Attributes
Name
Description
key_fields
:noindex:
MutableSequence[str]
Required. The key fields to construct from
the row key. The fields must be present in the
message as a top-level field, i.e. JSON path
expressions will not traverse into nested
objects.
delimiter
:noindex:
bytes
Optional. Byte sequence used to delimit
concatenated fields. Must be specified if
multiple key fields are used. The delimiter must
contain at least 1 character and at most 50
characters.
[[["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 2026-10-20 UTC."],[],[]]