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[AI Datamapper] Fix crash when LLM returns no mappings #1024

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Merged
merged 3 commits into from
Dec 1, 2025
Merged

[AI Datamapper] Fix crash when LLM returns no mappings #1024

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2172e21
Fix crash when LLM returns no mappings
VellummyilumVinoth Dec 1, 2025
f898443
Merge branch 'main' into zero-mapping-llm
VellummyilumVinoth Dec 1, 2025
759641d
Merge branch 'main' into zero-mapping-llm
xlight05 Dec 1, 2025
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20 changes: 20 additions & 0 deletions workspaces/ballerina/ballerina-extension/src/features/ai/service/datamapper/datamapper.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,12 @@ import { URI } from "vscode-uri";
import fs from 'fs';
import { writeBallerinaFileDidOpenTemp } from "../../../../../src/utils/modification";

const NO_MAPPINGS_GENERATED_WARNING = `**No Relevant Mappings Generated**\n\n` +
`The AI was unable to identify compatible field mappings between the input and output structures.\n\n` +
`**Suggestions:**\n` +
`- Check if input and output record structures are correct\n` +
`- Try providing mapping hints or examples\n`;

// =============================================================================
// ENHANCED MAIN ORCHESTRATOR FUNCTION
// =============================================================================
Expand Down Expand Up @@ -340,6 +346,13 @@ export async function generateMappingCodeCore(mappingRequest: ProcessMappingPara
attachments: mappingRequest.attachments
}, context, eventHandler);

// Check if no mappings were generated
if (!allMappingsRequest.mappings || allMappingsRequest.mappings.length === 0) {
eventHandler({ type: "content_block", content: NO_MAPPINGS_GENERATED_WARNING });
eventHandler({ type: "stop", command: Command.DataMap });
return;
}

const sourceCodeResponse = await getAllDataMapperSource(allMappingsRequest);

await updateSourceCode({ textEdits: sourceCodeResponse.textEdits, skipPayloadCheck: true });
Expand Down Expand Up @@ -694,6 +707,13 @@ export async function generateInlineMappingCodeCore(inlineMappingRequest: Metada
const inlineMappingsResult: InlineMappingsSourceResult =
await generateInlineMappingsSource(inlineMappingRequest, langClient, context, eventHandler);

// Check if no mappings were generated
if (!inlineMappingsResult.allMappingsRequest.mappings || inlineMappingsResult.allMappingsRequest.mappings.length === 0) {
eventHandler({ type: "content_block", content: NO_MAPPINGS_GENERATED_WARNING });
eventHandler({ type: "stop", command: Command.DataMap });
return;
}

await updateSourceCode({ textEdits: inlineMappingsResult.sourceResponse.textEdits, skipPayloadCheck: true });
await new Promise((resolve) => setTimeout(resolve, 100));

Expand Down
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