Spot table structure changes quickly
When a table's columns or inferred types change, turn the detected schema details into a visual summary.
Trigger
Table Schema Changed
Polling trigger that detects when a table's schema changes in Google Sheets. Monitors columns added/removed/renamed and inferred type/format changes. Uses snapshot-based diffing to compare schemas between polls.
Action
HTML to Image
Tool to convert base64-encoded html to an image. use when you need to render raw html or a url into png, jpeg, or webp after content load.
Why this helps
A renamed or removed column can disrupt downstream work before anyone notices the spreadsheet structure changed.
- Make detected column and type changes easier to scan.
- Create a shareable visual reminder when table structure changes.
- Help collaborators review schema changes promptly.
Setup
Build it in a few focused steps.
- 1Connect Google Sheets and Cloudlayer once in the Notis portal.
- 2Create an automation in Automations, then choose a name and prompt.
- 3Tell Notis to render a clear visual summary from the schema changes returned by the trigger.
- 4Choose Table Schema Changed as the trigger and select where run reports go.
- 5Test with one real schema change and review the image.
Questions about this workflow
What schema changes are monitored?
The trigger monitors columns added, removed, or renamed, along with inferred type or format changes.
Will it compare against every historical table version?
The event uses snapshot-based diffing between polls. It does not promise a complete historical schema archive.
Can I include downstream impact in the image?
Only if you provide the impact context or it is included in the available event data.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Sheets to Cloudlayer. A trigger fires from one place; an action lands in another.
Google Sheets triggers
Cloudlayer actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
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Webhook trigger
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Aggregate Metric Changed
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Tool to test api reachability. use when checking if the cloudlayer api is available.
Cell Range Values Changed
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HTML to Image
Tool to convert base64-encoded html to an image. use when you need to render raw html or a url into png, jpeg, or webp after content load.
Conditional Format Rule Changed
Triggers when conditional formatting rules change in a Google Spreadsheet. Detects when rules are added, updated, or removed. Uses snapshot-based diffing to detect changes between polls.
Convert HTML to PDF
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Data Validation Rule Changed
Triggers when data validation rules change (added/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
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Developer Metadata Changed
Triggers when developer metadata entries change (new/updated/removed) in a Google Spreadsheet. Uses snapshot-based diffing to detect changes between polls.
List Storage Configurations
Tool to retrieve a list of all storage configurations. use after authenticating to cloudlayer to view your account's storage settings.
Filtered Range Values Changed
Polling trigger that monitors Google Sheets filtered ranges for value changes. Uses snapshot-based diffing to detect when values matching a data filter change. Emits the matched values when changes are detected.
Convert URL to Image
Tool to convert a webpage url to an image. use when dynamic screenshot parameters are needed.
Connect any two apps with Notis in the middle.
Google Sheets and Cloudlayer, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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