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[fix] show more descriptive error if data returned from load is a non-POJO #7386

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Oct 26, 2022
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[fix] show more descriptive error if data returned from load is a non-POJO #7386

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[fix] show more descriptive error if data returned from is a non-POJO
errmayank Oct 25, 2022
868fe8f
add changes from review
errmayank Oct 25, 2022
4cf5e43
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errmayank Oct 26, 2022
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5 changes: 5 additions & 0 deletions .changeset/shiny-eels-brush.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'@sveltejs/kit': patch
---

Show more descriptive error if data returned from `load` is a non-POJO
14 changes: 14 additions & 0 deletions packages/kit/src/runtime/server/page/render.js
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Original file line number Diff line number Diff line change
Expand Up @@ -182,6 +182,20 @@ export async function render_response({
`Data returned from \`load\` while rendering ${event.routeId} is not serializable: ${error.message} (data.${match[2]})`
);
}

const nonPojoError = /pojo/i.exec(error.message);

if (nonPojoError) {
const constructorName = branch.find(({ server_data }) => server_data?.data?.constructor?.name)
?.server_data?.data?.constructor?.name;

throw new Error(
`Data returned from \`load\` (while rendering ${event.routeId}) must be a plain object${
constructorName ? ` rather than an instance of ${constructorName}` : ''
}`
);
}

throw error;
}

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