[英]Grails Command Object not getting Bound
I am doing a POC for Command object in Grails Controller and i face a road block where the binding doesn't happen. 我正在Grails Controller中为Command对象做POC,我遇到了没有发生绑定的障碍。
Command Object 命令对象
public class Employee {
String name;
int age;
@Override
public String toString() {
return "Employee{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
}
Controller : 控制器:
class EmployeeController {
def index() {
render (" Employee Index Called ");
}
def emp(Employee employee){
println( employee.toString());
render(" Success");
}
}
I am calling emp action from a rest client as below 我正在从其他客户打电话给emp行动,如下所示
Method: POST 方法:开机自检
URL : http://localhost:8080/Grails/employee/emp 网址 : http:// localhost:8080 / Grails / employee / emp
Request Body : { "name": "Vinod", "age": 34 } 请求正文 : {“ name”:“ Vinod”,“ age”:34}
I get employee.name as null and employee.age=0 always 我将employee.name设置为null,并且employee.age = 0始终
I am suspecting my Request Body is wrong but not sure. 我怀疑我的请求正文有误,但不确定。 Please help where I am going wrong.
请帮我哪里错了。
Thanks 谢谢
As far as I know, json is not bound automatically to command object (defined as action method arg), only plain params
are. 据我所知,json不会自动绑定到命令对象(定义为动作方法arg),只有普通
params
可以绑定。 To get a hold on JSON request you have to call 要保留JSON请求,您必须致电
def json = request.JSON
and then you can try binding it to your object: 然后您可以尝试将其绑定到您的对象:
def co = new MyCommandObject( json )
For POST request method, I had to set 'Content-Type' header as 'application/json' 对于POST请求方法,我必须将“ Content-Type”标头设置为“ application / json”
Grails constructs command object from JSON in request body of POST(JSON to Java Object) Grails在POST的请求正文中从JSON构造命令对象(JSON到Java Object)
Whenever Grails finds 'Content-Type' header as 'application/json' it will automatically parse the request body in JSON to command object and pass it on to the controller method. 每当Grails找到“ Content-Type”标头作为“ application / json”时,它将自动将JSON中的请求正文解析为命令对象,并将其传递给控制器方法。
You may also want to make the command class validatable by doing the following. 您可能还想通过执行以下操作使命令类可验证。 In Grails 3: Your command class can to implement grails.validation.Validateable trait.
在Grails 3中:您的命令类可以实现grails.validation.Validateable特征。
import grails.validation.Validateable
class Employee implements Validateable{
String name
int age
}
In Grails 2.x: You command class can have grails.validation.Validateable annotation 在Grails 2.x中:您的命令类可以具有grails.validation.Validateable批注
@grails.validation.Validateable
class Employee implements Validateable{
String name
int age
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.