Filter Out

This transformation enables you to create filters which prevent PostHog from ingesting data from your product unless it passes those filters. Any events which do not match the filter requirements are skipped over and are not ingested.

Requirements

Using this requires either PostHog Cloud with the data pipelines add-on, or a self-hosted PostHog instance running a recent version of the Docker image.

Installation

1. In PostHog, click the "Data pipeline" tab in the left sidebar.
2. Search for 'Filter Out' and select the transformation, press Install.
3. Follow the on-screen steps to configure the transformation.

This transformation will only work on events ingested after the transformation was enabled.

Configuration

The transformation can be configured via a JSON file which specifies the properties you would like to filter.

In the example config below, the transformation will only keep events where all of the following conditions are met:

• Email does not contain yourcompany.com
• Host is not localhost:8000
• Browser version greater than 100

[
  {
    "property": "email",
    "type": "string",
    "operator": "not_contains",
    "value": "yourcompany.com"
  },
  {
    "property": "$host",
    "type": "string",
    "operator": "is_not",
    "value": "localhost:8000"
  },
  {
    "property": "$browser_version",
    "type": "number",
    "operator": "gt",
    "value": 100
  }
]

The followed types and operators are allowed:

FAQ

Q: How can I filter out events from unwanted hosts?

You could use the following config:

[
  {
    "property": "$host",
    "type": "string",
    "operator": "is",
    "value": "posthog.com"
  }
]

Make sure to enable the Keep event if any of the filtered properties are undefined? option, otherwise, any events where the $host property is undefined will be filtered out.

Who maintains this?

This is maintained by the community. If you have issues with it not functioning as intended, please let us know!

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What if my question isn't answered above?

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