Question

我正在开发超级账本结构...我想开发一个像fabcar这样的应用程序，但想通过go..invoke的方法进行编译。

func (t *SimpleChaincode) queryAllProducts(stub shim.ChaincodeStubInterface) pb.Response {
fmt.Println("Inside queryAllProducts method of barcode Application ")

startKey := "PRODUCT0"
endKey := "PRODUCT999"

resultsIterator, err := stub.GetStateByRange(startKey, endKey)
if err != nil {
    return shim.Error(err.Error())
}
defer resultsIterator.Close()

// buffer is a JSON array containing QueryResults
var buffer bytes.Buffer
buffer.WriteString("[")

bArrayMemberAlreadyWritten := false
for resultsIterator.HasNext() {
    queryResponse, err := resultsIterator.Next()
    if err != nil {
        return shim.Error(err.Error())
    }
    // Add a comma before array members, suppress it for the first array member
    if bArrayMemberAlreadyWritten == true {
        buffer.WriteString(",")
    }
    buffer.WriteString("{\"Key\":")
    buffer.WriteString("\"")
    buffer.WriteString(queryResponse.Key)
    buffer.WriteString("\"")

    buffer.WriteString(", \"Record\":")
    // Record is a JSON object, so we write as-is
    buffer.WriteString(string(queryResponse.Value))
    buffer.WriteString("}")
    bArrayMemberAlreadyWritten = true
}
buffer.WriteString("]")

fmt.Printf("- queryAllProducts:\n%s\n", buffer.String())

return shim.Success(buffer.Bytes())
}

获取这样的输出..无法获取记录

[{"Key":"PRODUCT0", "Record":{}},{"Key":"PRODUCT1", "Record":{}}, 
 {"Key":"PRODUCT2", "Record":{}},{"Key":"PRODUCT3", "Record":{}}]

预期的输出就是这种格式

[{"Key":"CAR0", "Record": 
{"colour":"blue","make":"Toyota","model":"Prius","owner":"Tomoko"}},
{"Key":"CAR1", "Record": 
{"colour":"red","make":"Ford","model":"Mustang","owner":"Brad"}}]

queryResponse.Value不显示queryAllProducts方法的结果..仅显示queryResponse.Key

0 个答案: