|
|
| （相同用户的2个中间修订版本未显示） |
| 第31行： |
第31行： |
| | | | |
| | ===ChainCode代码=== | | ===ChainCode代码=== |
| − | {{{
| + | https://github.com/zs-liu/Fabric-SimpleChaincode |
| − | package main
| + | |
| − | | + | |
| − | import (
| + | |
| − | "fmt"
| + | |
| − | "strings"
| + | |
| − | "encoding/json"
| + | |
| − | "bytes"
| + | |
| − | "time"
| + | |
| − | "strconv"
| + | |
| − | | + | |
| − | "github.com/hyperledger/fabric/core/chaincode/shim"
| + | |
| − | pb "github.com/hyperledger/fabric/protos/peer"
| + | |
| − | )
| + | |
| − | | + | |
| − | type SimpleChaincode struct {
| + | |
| − | }
| + | |
| − | | + | |
| − | type record struct {
| + | |
| − | ObjectType string `json:"docType"`
| + | |
| − | RecordKey string `json:"rkey"`
| + | |
| − | PatientKey string `json:"pkey"`
| + | |
| − | PatientSex string `json:"psex"`
| + | |
| − | PatientAge int `json:"page"`
| + | |
| − | DateInfo time.Time `json:"date"`
| + | |
| − | PatientDisease string `json:"info"`
| + | |
| − | }
| + | |
| − | | + | |
| − | type jsontime time.Time
| + | |
| − | | + | |
| − | const timeFormat = "2006-01-02 15:04:05"
| + | |
| − | | + | |
| − | func main() {
| + | |
| − | err := shim.Start(new(SimpleChaincode))
| + | |
| − | if err != nil {
| + | |
| − | fmt.Printf("Error starting Simple chaincode: %s", err)
| + | |
| − | }
| + | |
| − | }
| + | |
| − | | + | |
| − | func (recordTime jsontime) MarshalJSON() ([]byte, error) {
| + | |
| − | var stamp = fmt.Sprintf("\"%s\"", time.Time(recordTime).Format(timeFormat))
| + | |
| − | return []byte(stamp), nil
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {
| + | |
| − | return shim.Success(nil)
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
| + | |
| − | function, args := stub.GetFunctionAndParameters()
| + | |
| − | fmt.Println("Invoke is running " + function)
| + | |
| − | if function == "insertRecord" {
| + | |
| − | return t.insertPatient(stub, args)
| + | |
| − | } else if function == "queryPatientByKey" {
| + | |
| − | return t.queryPatientByKey(stub, args)
| + | |
| − | } else if function == "queryPatientByAge" {
| + | |
| − | return t.queryRecordByAge(stub, args)
| + | |
| − | } else if function == "queryRecordByKey" {
| + | |
| − | return t.queryRecordByKey(stub, args)
| + | |
| − | } else if function == "queryRecordByDisease" {
| + | |
| − | return t.queryRecordByDisease(stub, args)
| + | |
| − | } else if function == "queryRecordBySex" {
| + | |
| − | return t.queryRecordBySex(stub, args)
| + | |
| − | } else if function == "queryPatientHistory" {
| + | |
| − | return t.queryPatientHistory(stub, args)
| + | |
| − | } else if function == "updatePatientState" {
| + | |
| − | return t.updatePatientState(stub, args)
| + | |
| − | } else if function == "queryPatientByRange" {
| + | |
| − | return t.queryPatientByRange(stub, args)
| + | |
| − | }
| + | |
| − | fmt.Println("Invoke did not find func: " + function) //not supported func
| + | |
| − | return shim.Error("Received unknown function invocation")
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) insertPatient(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | var err error
| + | |
| − | // 0 1 2 3 4 5
| + | |
| − | // "0123","0000","male","35","2006-01-02 15:04:05","Headache"
| + | |
| − | if len(args) != 6 {
| + | |
| − | return shim.Error("Insert: incorrect number of arguments. Expecting 4")
| + | |
| − | }
| + | |
| − | | + | |
| − | // === Insert Running ===
| + | |
| − | fmt.Println("Insert- start insert patient")
| + | |
| − | for i := 0; i < 6; i++ {
| + | |
| − | if len(args[i]) <= 0 {
| + | |
| − | return shim.Error("Insert: " + strconv.Itoa(i) + "th argument must be a non-empty string/integer/time")
| + | |
| − | }
| + | |
| − | }
| + | |
| − | recordKey := args[0]
| + | |
| − | patientKey := args[1]
| + | |
| − | patientSex := strings.ToLower(args[2])
| + | |
| − | patientAge, err := strconv.Atoi(args[3])
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Insert: 3rd argument must be a numeric integer")
| + | |
| − | }
| + | |
| − | dateInfo, err := time.Parse(timeFormat, args[4])
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Insert: 4rd argument must be in time format")
| + | |
| − | }
| + | |
| − | patientDisease := strings.ToLower(args[5])
| + | |
| − | | + | |
| − | // === Check if patient exists ===
| + | |
| − | patientAsBytes, err := stub.GetState(patientKey)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Insert: failed to get patient. " + err.Error())
| + | |
| − | } else if patientAsBytes != nil {
| + | |
| − | fmt.Println("Insert: This patient already exists--" + patientKey)
| + | |
| − | return shim.Error("Insert: This patient already exists--" + patientKey)
| + | |
| − | }
| + | |
| − | | + | |
| − | // === Create record object and marshal to JSON ===
| + | |
| − | objectType := "record"
| + | |
| − | record := &record{objectType, recordKey, patientKey, patientSex, patientAge, dateInfo, patientDisease}
| + | |
| − | recordJSONasBytes, err := json.Marshal(record)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Insert: " + err.Error())
| + | |
| − | }
| + | |
| − | | + | |
| − | // === Save record to state ===
| + | |
| − | err = stub.PutState(patientKey, recordJSONasBytes)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Insert: " + err.Error())
| + | |
| − | }
| + | |
| − | | + | |
| − | // ==== Index the patient to enable age-based range queries, e.g. return all 35-year-old patients ====
| + | |
| − | // An 'index' is a normal key/value entry in state.
| + | |
| − | // The key is a composite key, with the elements that you want to range query on listed first.
| + | |
| − | // In our case, the composite key is based on indexName~patientAge~patientKey.
| + | |
| − | // This will enable very efficient state range queries based on composite keys matching indexName~color~*
| + | |
| − | indexName := "disease~pkey"
| + | |
| − | diseaseKeyIndexKey, err := stub.CreateCompositeKey(indexName, []string{record.PatientDisease, record.PatientKey})
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | // Save index entry to state. Only the key name is needed, no need to store a duplicate copy of the marble.
| + | |
| − | // Note - passing a 'nil' value will effectively delete the key from state, therefore we pass null character as value
| + | |
| − | value := []byte{0x00}
| + | |
| − | stub.PutState(diseaseKeyIndexKey, value)
| + | |
| − | | + | |
| − | // === Record saved and indexed. Return success ====
| + | |
| − | fmt.Println("- end init patient")
| + | |
| − | return shim.Success(nil)
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryPatientByKey(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | var patientKey, jsonResp string
| + | |
| − | var err error
| + | |
| − | | + | |
| − | if len(args) != 1 {
| + | |
| − | return shim.Error("Query: Incorrect number of arguments. Expecting key of the patient to query")
| + | |
| − | }
| + | |
| − | | + | |
| − | patientKey = args[0]
| + | |
| − | valAsbytes, err := stub.GetState(patientKey)
| + | |
| − | if err != nil {
| + | |
| − | jsonResp = "{\"Error\":\"Failed to get state for " + patientKey + "\"}"
| + | |
| − | return shim.Error(jsonResp)
| + | |
| − | } else if valAsbytes == nil {
| + | |
| − | jsonResp = "{\"Error\":\"Patient does not exist: " + patientKey + "\"}"
| + | |
| − | return shim.Error(jsonResp)
| + | |
| − | }
| + | |
| − | | + | |
| − | return shim.Success(valAsbytes)
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryRecordByKey(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | // 0
| + | |
| − | // "0123"
| + | |
| − | if len(args) != 1 {
| + | |
| − | return shim.Error("Query: incorrect number of arguments. Expecting 1")
| + | |
| − | }
| + | |
| − | | + | |
| − | recordKey := args[0]
| + | |
| − | queryString := fmt.Sprintf("{\"selector\":{\"doctype\":\"record\",\"rkey\":\"%s\"}}", recordKey)
| + | |
| − | | + | |
| − | var err error
| + | |
| − | queryResults, err := getQueryResultForQueryString(stub, queryString)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | return shim.Success(queryResults)
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryRecordByAge(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | // 0
| + | |
| − | // "35"
| + | |
| − | if len(args) != 1 {
| + | |
| − | return shim.Error("Query: incorrect number of arguments. Expecting 1")
| + | |
| − | }
| + | |
| − | var err error
| + | |
| − | patientAge, err := strconv.Atoi(args[0])
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Query: 1th argument must be a numeric integer")
| + | |
| − | }
| + | |
| − | | + | |
| − | queryString := fmt.Sprintf("{\"selector\":{\"doctype\":\"record\",\"page\":%s}}", strconv.Itoa(patientAge))
| + | |
| − | | + | |
| − | queryResults, err := getQueryResultForQueryString(stub, queryString)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | return shim.Success(queryResults)
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryRecordByDisease(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | // 0
| + | |
| − | // "headache"
| + | |
| − | if len(args) != 1 {
| + | |
| − | return shim.Error("Query: incorrect number of arguments. Expecting 1")
| + | |
| − | }
| + | |
| − | var err error
| + | |
| − | patientDisease := strings.ToLower(args[0])
| + | |
| − | | + | |
| − | diseasePatientResultsIterator, err := stub.GetStateByPartialCompositeKey("disease~pkey", []string{patientDisease})
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | defer diseasePatientResultsIterator.Close()
| + | |
| − | | + | |
| − | // Iterate through result set and for each patient found
| + | |
| − | var buffer bytes.Buffer
| + | |
| − | var jsonResp string
| + | |
| − | buffer.WriteString("[")
| + | |
| − | for diseasePatientResultsIterator.HasNext() {
| + | |
| − | // Note that we don't get the value (2nd return variable), we'll just get the patient key from the composite key
| + | |
| − | responseRange, err := diseasePatientResultsIterator.Next()
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | | + | |
| − | // Get the disease and patient key from disease~pkey composite key
| + | |
| − | objectType, compositeKeyParts, err := stub.SplitCompositeKey(responseRange.Key)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | returnedDisease := compositeKeyParts[0]
| + | |
| − | returnedPatientKey := compositeKeyParts[1]
| + | |
| − | fmt.Printf("- found a patient from index:%s disease:%s patinet key:%s\n", objectType, returnedDisease, returnedPatientKey)
| + | |
| − | valAsbytes, err := stub.GetState(returnedPatientKey)
| + | |
| − | if err != nil {
| + | |
| − | jsonResp = "{\"Error\":\"Failed to get state for " + returnedPatientKey + "\"}"
| + | |
| − | return shim.Error(jsonResp)
| + | |
| − | } else if valAsbytes == nil {
| + | |
| − | jsonResp = "{\"Error\":\"Patient does not exist: " + returnedPatientKey + "\"}"
| + | |
| − | return shim.Error(jsonResp)
| + | |
| − | }
| + | |
| − | buffer.Write(valAsbytes)
| + | |
| − | buffer.WriteByte('\n')
| + | |
| − | }
| + | |
| − | fmt.Printf("- found patients info as follows:%s\n", buffer.String())
| + | |
| − | return shim.Success(buffer.Bytes())
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryRecordBySex(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | // 0
| + | |
| − | // "male"
| + | |
| − | if len(args) != 1 {
| + | |
| − | return shim.Error("Query: incorrect number of arguments. Expecting 1")
| + | |
| − | }
| + | |
| − | var err error
| + | |
| − | patientSex := strings.ToLower(args[0])
| + | |
| − | | + | |
| − | queryString := fmt.Sprintf("{\"selector\":{\"doctype\":\"record\",\"psex\":\"%s\"}}", patientSex)
| + | |
| − | | + | |
| − | queryResults, err := getQueryResultForQueryString(stub, queryString)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | return shim.Success(queryResults)
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryPatientHistory(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | if len(args) < 1 {
| + | |
| − | return shim.Error("Query: Incorrect number of arguments. Expecting 1")
| + | |
| − | }
| + | |
| − | | + | |
| − | patientKey := args[0]
| + | |
| − | | + | |
| − | fmt.Printf("Query- start query patient's history: %s\n", patientKey)
| + | |
| − | | + | |
| − | resultsIterator, err := stub.GetHistoryForKey(patientKey)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | defer resultsIterator.Close()
| + | |
| − | | + | |
| − | // buffer is a JSON array containing historic values for the marble
| + | |
| − | var buffer bytes.Buffer
| + | |
| − | buffer.WriteString("[")
| + | |
| − | | + | |
| − | bArrayMemberAlreadyWritten := false
| + | |
| − | for resultsIterator.HasNext() {
| + | |
| − | response, 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("{\"TxId\":")
| + | |
| − | buffer.WriteString("\"")
| + | |
| − | buffer.WriteString(response.TxId)
| + | |
| − | buffer.WriteString("\"")
| + | |
| − | | + | |
| − | buffer.WriteString(", \"Value\":")
| + | |
| − | // if it was a delete operation on given key, then we need to set the
| + | |
| − | //corresponding value null. Else, we will write the response.Value
| + | |
| − | //as-is (as the Value itself a JSON marble)
| + | |
| − | if response.IsDelete {
| + | |
| − | buffer.WriteString("null")
| + | |
| − | } else {
| + | |
| − | buffer.WriteString(string(response.Value))
| + | |
| − | }
| + | |
| − | | + | |
| − | buffer.WriteString(", \"Timestamp\":")
| + | |
| − | buffer.WriteString("\"")
| + | |
| − | buffer.WriteString(time.Unix(response.Timestamp.Seconds, int64(response.Timestamp.Nanos)).String())
| + | |
| − | buffer.WriteString("\"")
| + | |
| − | | + | |
| − | buffer.WriteString(", \"IsDelete\":")
| + | |
| − | buffer.WriteString("\"")
| + | |
| − | buffer.WriteString(strconv.FormatBool(response.IsDelete))
| + | |
| − | buffer.WriteString("\"")
| + | |
| − | | + | |
| − | buffer.WriteString("}")
| + | |
| − | bArrayMemberAlreadyWritten = true
| + | |
| − | }
| + | |
| − | buffer.WriteString("]")
| + | |
| − | | + | |
| − | fmt.Printf("- query patient's history returning:\n%s\n", buffer.String())
| + | |
| − | | + | |
| − | return shim.Success(buffer.Bytes())
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) queryPatientByRange(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | if len(args) < 2 {
| + | |
| − | return shim.Error("RangeQuery: Incorrect number of arguments. Expecting 2")
| + | |
| − | }
| + | |
| − | startKey := args[0]
| + | |
| − | endKey := args[1]
| + | |
| − | 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("- queryPatientByRange queryResult:\n%s\n", buffer.String())
| + | |
| − | return shim.Success(buffer.Bytes())
| + | |
| − | }
| + | |
| − | | + | |
| − | func getQueryResultForQueryString(stub shim.ChaincodeStubInterface, queryString string) ([]byte, error) {
| + | |
| − | fmt.Printf("- getQueryResultForQueryString queryString:\n%s\n", queryString)
| + | |
| − | | + | |
| − | resultsIterator, err := stub.GetQueryResult(queryString)
| + | |
| − | if err != nil {
| + | |
| − | return nil, err
| + | |
| − | }
| + | |
| − | defer resultsIterator.Close()
| + | |
| − | | + | |
| − | // buffer is a JSON array containing QueryRecords
| + | |
| − | var buffer bytes.Buffer
| + | |
| − | buffer.WriteString("[")
| + | |
| − | | + | |
| − | bArrayMemberAlreadyWritten := false
| + | |
| − | for resultsIterator.HasNext() {
| + | |
| − | queryResponse, err := resultsIterator.Next()
| + | |
| − | if err != nil {
| + | |
| − | return nil, err
| + | |
| − | }
| + | |
| − | // 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("- getQueryResultForQueryString queryResult:\n%s\n", buffer.String())
| + | |
| − | return buffer.Bytes(), nil
| + | |
| − | }
| + | |
| − | | + | |
| − | func (t *SimpleChaincode) updatePatientState(stub shim.ChaincodeStubInterface, args []string) pb.Response {
| + | |
| − | | + | |
| − | // 0 1 2 3 4
| + | |
| − | // '"0124","0000","35","2006-01-02 15:04:05","legbroke"
| + | |
| − | if len(args) < 4 {
| + | |
| − | return shim.Error("Update: incorrect number of arguments. Expecting 4")
| + | |
| − | }
| + | |
| − | var err error
| + | |
| − | recordKey := args[0]
| + | |
| − | patientKey := args[1]
| + | |
| − | newAge, err := strconv.Atoi(args[2])
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Update: 3rd argument must be a numeric integer")
| + | |
| − | }
| + | |
| − | newDate, err := time.Parse(timeFormat, args[3])
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Update: 4rd argument must be in time format")
| + | |
| − | }
| + | |
| − | newDisease := strings.ToLower(args[4])
| + | |
| − | fmt.Println("Update- start update patient state ", patientKey, ":", recordKey, newAge, newDate, newDisease)
| + | |
| − | | + | |
| − | patientAsBytes, err := stub.GetState(patientKey)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Update: failed to get patient. " + err.Error())
| + | |
| − | } else if patientAsBytes == nil {
| + | |
| − | fmt.Println("Update: This patient does not exist--" + patientKey)
| + | |
| − | return shim.Error("Update: This patient does not exist--" + patientKey)
| + | |
| − | }
| + | |
| − | patientToTransfer := record{}
| + | |
| − | err = json.Unmarshal(patientAsBytes, &patientToTransfer)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | | + | |
| − | // Maintain the index
| + | |
| − | indexName := "disease~pkey"
| + | |
| − | diseaseKeyIndexKey, err := stub.CreateCompositeKey(indexName, []string{patientToTransfer.PatientDisease, patientToTransfer.PatientKey})
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | | + | |
| − | // Delete index entry to state
| + | |
| − | err = stub.DelState(diseaseKeyIndexKey)
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error("Update: Failed to maintain index :" + err.Error())
| + | |
| − | }
| + | |
| − | return shim.Success(nil)
| + | |
| − | | + | |
| − | patientToTransfer.PatientAge = newAge
| + | |
| − | patientToTransfer.DateInfo = newDate
| + | |
| − | patientToTransfer.PatientDisease = newDisease //change info
| + | |
| − | | + | |
| − | // Create new index entry to state
| + | |
| − | newDiseaseKeyIndexKey, err := stub.CreateCompositeKey(indexName, []string{patientToTransfer.PatientDisease, patientToTransfer.PatientKey})
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | // Save index entry to state. Only the key name is needed, no need to store a duplicate copy of the marble.
| + | |
| − | // Note - passing a 'nil' value will effectively delete the key from state, therefore we pass null character as value
| + | |
| − | value := []byte{0x00}
| + | |
| − | stub.PutState(newDiseaseKeyIndexKey, value)
| + | |
| − | | + | |
| − | patientJSONasBytes, _ := json.Marshal(patientToTransfer)
| + | |
| − | err = stub.PutState(patientKey, patientJSONasBytes) //rewrite the patient
| + | |
| − | if err != nil {
| + | |
| − | return shim.Error(err.Error())
| + | |
| − | }
| + | |
| − | fmt.Println("- end update patient state (success)")
| + | |
| − | return shim.Success(nil)
| + | |
| − | }
| + | |
| − | | + | |
| − | }}}
| + | |
