Reply To: How to track custom event occurrences with specific parameters in GA4 using the API?

[Carter]

Your approach is accurate, but you’ve encountered a problem because stringFilter cannot be used with metricFilter. Instead, you should continue to use dimensionFilter. When setting up the event, consider the “userId” as a parameter to your “butt” event, which means it considers to be a part of dimension, not metric.

Here’s how you should filter events where the “userId” parameter matches a certain value:

`javascript
const [response] = await analyticsDataClient.runReport({
property: ‘properties/’+process.env.GA4ID,
dateRanges: [{
startDate: ‘2020-03-31’,
endDate: ‘today’,
}],
dimensions: [
{name: ‘eventName’},
{name: ‘customEvent:userId’}
],
dimensionFilter: {
andGroup: {
filters: [
{
filter: {
fieldName: ‘eventName’,
stringFilter: {value: ‘butt’}
}
},
{
filter: {
fieldName: ‘customEvent:userId’,
stringFilter: {value: ‘VD5894237597126308723423’}
}
},
]
}
},
metrics: [
{name: ‘eventCount’}
],
});
`
This way, you’re checking for two filters: if the event name is ‘butt’ and if the userId matches ‘VD5894237597126308723423’. Now you should get the results filtered for specific userId.