在Go语言中,是否可能通过编程方式创建结构体类型(即不在编译后的源代码中定义)?
我们有一个特定的用例,其中类型将通过用户定义的元数据创建(因此预先未知模式/类型),并且每个客户的类型都不同。然后,我们需要自动生成这些类型的REST服务,并将它们持久化到NoSQL后端。我们还需要为每个字段定义不同的动态验证器(例如:强制、正则表达式、最大/最小值、对另一类型实例的引用等)。
我想知道Go语言中是否存在类似的功能?
编辑1:
例如:
从前端以JSON格式传输
For customer 1:
{
"id":1,
"patientid":1,
"name":"test1",
"height":"160",
"weight":"70",
"temp":"98"
}
For customer 2:
{
"id":2,
"patientid":1,
"name":"test1",
"height":"160",
"weight":"70"
}
For customer 3
may be different new fields will add
Backend
// For One customer need to have these fields
type Vitalsigns struct {
ID int64 `datastore:"-"`
PatientID int64 `json:"patientid,omitempty"`
Name string `json:"name,omitempty"`
Height string `json:"height,omitempty"`
Weight string `json:"weight,omitempty"`
Temp string `json:"temp,omitempty"`
}
// Another need to have these fields
type Vitalsigns struct {
ID int64 `datastore:"-"`
PatientID int64 `json:"patientid,omitempty"`
Name string `json:"name,omitempty"`
Height string `json:"height,omitempty"`
Weight string `json:"weight,omitempty"`
}
//CreateVitalsignsHandler is to create vitals for a patient
func CreateVitalsignsHandler(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
//Creating the Vitalsigns
kinVitalsigns := &Vitalsigns{}
ctx := appengine.NewContext(r)
if err := json.NewDecoder(r.Body).Decode(kinVitalsigns); err != nil {
RespondErr(w, r, http.StatusInternalServerError, err.Error())
return
}
//Getting namespace
namespace := ps.ByName("namespace")
ctx, err := appengine.Namespace(ctx, namespace)
if err != nil {
log.Infof(ctx, "Namespace error from CreateVitalsignsHandler")
RespondErr(w, r, http.StatusInternalServerError, err.Error())
return
}
//Geting the patientID
pID, err := strconv.Atoi(ps.ByName("id"))
if err != nil {
log.Infof(ctx, "Srting to Int64 conversion error from CreateVitalsignsHandler")
RespondErr(w, r, http.StatusInternalServerError, err.Error())
return
}
patientID := int64(pID)
kinVitalsigns.PatientID = patientID
//Generating the key
vitalsignsKey := datastore.NewIncompleteKey(ctx, "Vitalsigns", nil)
//Inserting the data to the datastore
vk, err := datastore.Put(ctx, vitalsignsKey, kinVitalsigns)
if err != nil {
log.Infof(ctx, "Entity creation was failed from CreateVitalsignsHandler")
RespondErr(w, r, http.StatusInternalServerError, err.Error())
return
}
kinVitalsigns.ID = vk.IntID()
message := "Vitalsigns created successfully!! "
Respond(w, r, http.StatusOK, SuccessResponse{kinVitalsigns.ID, 0, "", message})
return
}