DataSag guides · Updated 27 October 2026
Install DataSag on Flask with Jinja
Add DataSag to Flask with Jinja through the head of the Jinja base template used by your routes. Create a project first, then replace the example public key with the key from your dashboard.
Where to put the tracking script
Put the deferred external script once in the shared Jinja base template under your application templates directory. Preserve existing blocks, imports and asset links. Confirm that render_template calls for your public routes select children of that base. The tracker remains an external browser script rather than Python application code.
<script defer src="https://www.datasag.com/tracker.js" data-datasag-key="YOUR_PUBLIC_KEY"></script>The project tracking key is public and belongs in this snippet. Account credentials, provider API keys and database secrets do not. Keep your existing consent choices and only load analytics when your site's policy permits it.
Verify the published installation
- Publish the change to the domain visitors actually use. Open a nested page as well as the homepage.
- In browser developer tools, find one tracker.js script with the correct data-datasag-key value.
- Filter Network requests for /api/track. Confirm that a pageview payload names the path you opened and receives a successful response.
- Open the same DataSag project and choose a date range containing your test. Confirm the page appears before measuring campaigns or conversions.
Avoid this Flask with Jinja setup mistake
Blueprint-specific template directories and independent render_template_string responses can bypass the base template. A child head block can replace inherited content unless it retains it. Inspect the generated response from the affected endpoint.
Keep pageviews separate from scroll, click and engagement events. A page can generate several tracking requests while still representing one visit to that path.
Events and conversions
Use an HTML goal attribute for click intent or call the API from a browser handler after success. A Flask view, Python callback or background job cannot directly call the visitor window.
<a href="/signup" data-datasag-goal="signup_click">Create account</a>This attribute measures a click. To record a completed signup, call window.datasag.track in the application's confirmed success handler. Current plan details determine which event and campaign reports are available.
Setup and troubleshooting recipes
- Verify DataSag analytics on Flask with Jinja
Check the rendered script, public project key, browser requests and first pageview before relying on your analytics.
- Fix DataSag analytics not working on Flask with Jinja
Trace missing website visits through script placement, project keys, exclusions, consent, network delivery and report filters.
- Fix duplicate analytics pageviews on Flask with Jinja
Separate legitimate engagement events from duplicate tracker installations and repeated pageview dispatches.
- Track custom events on Flask with Jinja
Add click goals or completed-action events with DataSag's data attribute and browser JavaScript API.
- Track UTM campaigns on your website
Create consistent tagged links and verify that campaign parameters reach your website and DataSag.
- Measure AI referral traffic on your website
Check visits with observable AI referrers and understand the difference between traffic, citations and LLM visibility.
- Configure CSP for DataSag analytics on your website
Diagnose blocked scripts, beacon requests and image fallbacks without disabling your site's Content Security Policy.
- Exclude your own analytics visits on your website
Use DataSag's browser exclusion switch to keep your testing activity out of future tracked visits.
- Load analytics without blocking rendering on Flask with Jinja
Choose a non-blocking script placement and verify actual loading behavior instead of relying on a fixed speed claim.
Platform reference
Official Flask with Jinja documentation explains the platform integration point. DataSag-specific behavior here follows the current tracker and project setup.
Need a different stack? Browse every installation guide.