{"record":{"id":"bfb3b5df71b1f778","repo":"chroma-core/chroma","slug":"embedding-function-returned-unexpected-number-of-e","errorCode":null,"errorMessage":"Embedding function returned unexpected number of embeddings.","messagePattern":"Embedding function returned unexpected number of embeddings\\.","errorType":"validation","errorClass":"ChromaValueError","httpStatus":null,"severity":"error","filePath":"clients/new-js/packages/chromadb/src/collection.ts","lineNumber":644,"sourceCode":"\n    return resultMetadatas as Metadata[];\n  }\n\n  private async embedKnnLiteral(\n    knn: Record<string, unknown>,\n  ): Promise<Record<string, unknown>> {\n    const queryValue = knn.query as unknown;\n    if (typeof queryValue !== \"string\") {\n      return { ...knn };\n    }\n\n    const keyValue = knn.key as unknown;\n    const key = typeof keyValue === \"string\" ? keyValue : EMBEDDING_KEY;\n\n    if (key === EMBEDDING_KEY) {\n      const embeddings = await this.embed([queryValue], true);\n      if (!embeddings || embeddings.length !== 1) {\n        throw new ChromaValueError(\n          \"Embedding function returned unexpected number of embeddings.\",\n        );\n      }\n      return { ...knn, query: embeddings[0] };\n    }\n\n    const schema = this._schema;\n    if (!schema) {\n      throw new ChromaValueError(\n        `Cannot embed string query for key '${key}': schema is not available. Provide an embedded vector or configure an embedding function.`,\n      );\n    }\n\n    const valueTypes = schema.keys[key];\n    if (!valueTypes) {\n      throw new ChromaValueError(\n        `Cannot embed string query for key '${key}': key not found in schema. Provide an embedded vector or configure an embedding function.`,\n      );","sourceCodeStart":626,"sourceCodeEnd":662,"githubUrl":"https://github.com/chroma-core/chroma/blob/aecdd12c8a891610db8653630b066b32ceb678b5/clients/new-js/packages/chromadb/src/collection.ts#L626-L662","documentation":"Error \"Embedding function returned unexpected number of embeddings.\" thrown in chroma-core/chroma.","triggerScenarios":"Thrown at clients/new-js/packages/chromadb/src/collection.ts:644 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"aecdd12c8a891610db8653630b066b32ceb678b5","analyzedAt":"2026-08-16T21:53:27.228Z","schemaVersion":2},"datasetVersion":"2026-08-16T23:17:17.608Z"}