英文:
GoLang Gin - Binding JSON data from POST request rewrites all Identifier Fields to 0
问题
我正在使用GoLang迈出第一步，并且正在设置一个API服务器，该服务器能够从POST请求中读取JSON文件并将其保存到内存中。
我有一个以下的JSON文件：
[
{
"id": 0,
"name": "kubernetes",
"uri": "https://github.com/kubernetes/kubernetes"
},
{
"id": 1,
"name": "jenkins",
"uri": "https://github.com/jenkinsci/jenkins"
}
]
我正在将其POST到运行在本地端口上的API服务器。
这是我的setupRoutes()函数：
func setupRoutes() {
// 初始化路由器
router := gin.Default()
// 初始化路由
router.GET("/api/projects", getProjects)
router.GET("/api/projects/:id", getProjectByIdentifier)
router.POST("/api/projects", uploadProjects)
// 启动路由器
router.Run("localhost:8080")
}
这是我的uploadProjects()函数：
// 从POST请求中读取文件，并将其保存到内存中。
func uploadProjects(c *gin.Context) {
// 初始化对象
var obj []Project
// 将JSON数据绑定到对象
c.BindJSON(&obj)
fmt.Println(obj) // 用于测试：绑定的内容是什么。
// 将数据保存到内存中
proj = obj
}
这是Project结构体：
type Project struct {
Identifier int64 json:"id"
Name string json:"name"
Uri string json:"uri"
}
执行完这些代码后，我可以立即打印出数据，即绑定的内容，或者可以通过GET /api/projects调用获取数据，结果始终是：
[{0 kubernetes https://github.com/kubernetes/kubernetes} {0 jenkins https://github.com/jenkinsci/jenkins}]
我尝试过：
- 在结构体的Identifier字段中尝试了string、int和int64类型的交换。
- 进行了大量的谷歌搜索。
这可能是非常简单的问题，但是我真的不知道从哪里开始查找，所以非常感谢任何帮助。
英文:
I am taking my first steps with GoLang, and currently setting up an API Server, which is able to read JSON file from POST Request and save that to Memory.
I have a JSON File as Following:
[
{
"id": 0,
"name": "kubernetes",
"uri": "https://github.com/kubernetes/kubernetes"
},
{
"id": 1,
"name": "jenkins",
"uri": "https://github.com/jenkinsci/jenkins"
}
]
Which I am POST:ing to the API Server running on local port.
Here is my setupRoutes() - function:
func setupRoutes() {
// Initialize Router
router := gin.Default()
// Initialize Routes
router.GET("/api/projects", getProjects)
router.GET("/api/projects/:id", getProjectByIdentifier)
router.POST("/api/projects", uploadProjects)
// Start the Router
router.Run("localhost:8080")
}
and here is my uploadProjects() - function:
// Reads file from POST request, and saves that to Memory.
func uploadProjects(c *gin.Context) {
// Initialize Object
var obj []Project
// Bind JSON Data to Object
c.BindJSON(&obj)
fmt.Println(obj) // For Testing: What is binded.
// Save Data to Memory
proj = obj
}
and here is the Project Struct:
type Project struct {
Identifier int64 `json: id`
Name string `json: name`
Uri string `json: uri`
}
After executing this - I can print that data out right away, what is being binded or I can fetch that with my GET /api/projects - call, and the result is always:
[{0 kubernetes https://github.com/kubernetes/kubernetes} {0 jenkins https://github.com/jenkinsci/jenkins}]
What I've tried:
- I've tried to swap between string, int and int64 types of Identifier Field in my struct.
- Googled a Bunch
This is probably something very simple, but I don't really know where to look at this point, so any help is appreciated.
答案1
得分: 1
id字段与字段名Identifier不匹配。通过使用正确格式的JSON字段标签进行修复。问题中使用的字段标签未被JSON编解码器识别。
type Project struct {
Identifier int64 `json:"id"`
Name string `json:"name"`
Uri string `json:"uri"`
}
请注意，修复后的代码中的字段标签已经使用了正确的格式，即在标签名称前加上了冒号。
英文:
The id field does not match the field name Identifier. Fix by using properly formatted JSON field tags. The field tags used in the question are not recognized by the JSON codec.
type Project struct {
Identifier int64 `json:"id"`
Name string `json:"name"`
Uri string `json:"uri"`
}
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