Go 无法对json.decoded请求正文进行编码

我有一个服务器实现。现在我正在编写单元测试来检查它的功能。 我无法准备请求，这将在服务器端很好地解组。以下代码导致InvalidUnmarshall错误。我不知道如何进一步调试它

客户端代码：

    body := PatchCatRequest{Adopted: true}
    bodyBuf := &bytes.Buffer{}
    err := json.NewEncoder(bodyBuf).Encode(body)
    assert.NoError(t, err)
    req, err := http.NewRequest("PATCH", URL+"/"+catId, bodyBuf)
    recorder := httptest.NewRecorder()
    handler.PatchCat(recorder, req.WithContext(ctx))

type PatchCatRequest struct {
Adopted bool `json:"adopted"`
}

func (h *Handler) PatchCat (rw http.ResponseWriter, req *http.Request) {
    var patchRequest *PatchCatRequest


if err := json.NewDecoder(req.Body).Decode(patchRequest); err != nil {
    rw.WriteHeader(http.StatusBadRequest)
    logger.WithField("error", err.Error()).Error(ErrDocodeRequest.Error())
    return
}
...
}

服务器端代码：

    body := PatchCatRequest{Adopted: true}
    bodyBuf := &bytes.Buffer{}
    err := json.NewEncoder(bodyBuf).Encode(body)
    assert.NoError(t, err)
    req, err := http.NewRequest("PATCH", URL+"/"+catId, bodyBuf)
    recorder := httptest.NewRecorder()
    handler.PatchCat(recorder, req.WithContext(ctx))

type PatchCatRequest struct {
Adopted bool `json:"adopted"`
}

func (h *Handler) PatchCat (rw http.ResponseWriter, req *http.Request) {
    var patchRequest *PatchCatRequest


if err := json.NewDecoder(req.Body).Decode(patchRequest); err != nil {
    rw.WriteHeader(http.StatusBadRequest)
    logger.WithField("error", err.Error()).Error(ErrDocodeRequest.Error())
    return
}
...
}

---

您正在解组一个nil指针，如错误消息所示：

package main

import (
    "encoding/json"
    "fmt"
)

type PatchCatRequest struct {
    Adopted bool
}

func main() {
    var patchRequest *PatchCatRequest // nil pointer

    err := json.Unmarshal([]byte(`{"Adopted":true}`), patchRequest)
    fmt.Println(err) // json: Unmarshal(nil *main.PatchCatRequest)
}

在解组之前初始化指针：

func main() {
    patchRequest := new(PatchCatRequest) // non-nil pointer

    err := json.Unmarshal([]byte(`{"Adopted":true}`), patchRequest)
    fmt.Println(err) // <nil>
}

func main（）{
patchRequest:=新建（PatchCatRequest）//非零指针
err:=json.Unmarshal（[]字节（`{“已采用”：true}`），patchRequest）
fmt.Println（错误）//
}

---

如果您遇到错误，请在问题中包含错误。

InvalidUnmarshallError