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docs: link external connections from custom chart types - #1199

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almeidabbm merged 2 commits into
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docs/chart-type-external-connections
Aug 28, 2026
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docs: link external connections from custom chart types#1199
almeidabbm merged 2 commits into
mainfrom
docs/chart-type-external-connections

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@almeidabbm

@almeidabbm almeidabbm commented Aug 28, 2026

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Relates: https://linear.app/lightdash/issue/PROD-10583/allow-external-connections-in-custom-chart-types
Relates: lightdash/lightdash#28056

Description

Custom chart types render in the data apps sandbox, so images from a URL field are blocked until the chart type is linked to an external connection with public images enabled (shipped in lightdash/lightdash#28136 and #28235). The docs didn't cover the chart type side of that flow.

  • Custom project charts: new Linking external connections section, written as a step-by-step: register the connection, allow public images, choose who can link it, attach it in the builder, check it in the Explorer. Light/dark screenshots of the builder (picker open, linked connection) and of the Explorer rendering an icon per bar, taken against a local image-URL dimension.
  • Custom project charts: the picker wording now matches the Explorer (Configure → Change → Project, with Create new chart type in the same group) instead of the older Custom menu.
  • Data apps → External connections: documents the two connection settings the steps rely on (Who can link it, Allow public images in linked apps), clarifies what builders see in the picker, and links back to the chart types section.

mint broken-links and npm test pass.

Chart types render in the data apps sandbox, so images from a URL field are blocked until a connection with public images enabled is linked. The chart types page now walks through registering, allowing images, and attaching the connection in the builder; the data apps page documents the two connection settings the steps rely on and links back.
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Documentation validation

✅ All blocking checks passed.

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Download the structured JSON artifact.

…icker

The pictures now come from a chart type built inside the Explorer against the demo's payment method icons, so the linked image host is visibly doing its job. The picker copy is updated to Configure → Change → Project, which is what the Explorer shows today.
@almeidabbm
almeidabbm merged commit 3ea059a into main Aug 28, 2026
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@almeidabbm
almeidabbm deleted the docs/chart-type-external-connections branch August 28, 2026 15:43
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