如何在Strongloop Loopback中更改http状态代码 [英] How to change http status codes in Strongloop Loopback

问题描述

我正在尝试修改create的http状态代码。

I am trying to modify the http status code of create.

POST /api/users
{
    "lastname": "wqe",
    "firstname": "qwe",
}

返回200而不是201

Returns 200 instead of 201

我可以为错误做点什么：

I can do something like that for errors:

var err = new Error();
err.statusCode = 406;
return callback(err, info);

但是我找不到如何更改create的状态代码。

But I can't find how to change status code for create.

我找到了创建方法：

MySQL.prototype.create = function (model, data, callback) {
  var fields = this.toFields(model, data);
  var sql = 'INSERT INTO ' + this.tableEscaped(model);
  if (fields) {
    sql += ' SET ' + fields;
  } else {
    sql += ' VALUES ()';
  }
  this.query(sql, function (err, info) {
    callback(err, info && info.insertId);
  });
};

推荐答案

致电 remoteMethod 您可以直接向响应中添加一个函数。这是通过 rest.after 选项完成的：

In your call to remoteMethod you can add a function to the response directly. This is accomplished with the rest.after option:

function responseStatus(status) {
  return function(context, callback) {
    var result = context.result;
    if(testResult(result)) { // testResult is some method for checking that you have the correct return data
      context.res.statusCode = status;
    }
    return callback();
  }
}

MyModel.remoteMethod('create', {
  description: 'Create a new object and persist it into the data source',
  accepts: {arg: 'data', type: 'object', description: 'Model instance data', http: {source: 'body'}},
  returns: {arg: 'data', type: mname, root: true},
  http: {verb: 'post', path: '/'},
  rest: {after: responseStatus(201) }
});

注意：如果 context.result 值为falsey。为了解决这个问题，我只需使用我想要的状态代码传回空对象 {} 。

Note: It appears that strongloop will force a 204 "No Content" if the context.result value is falsey. To get around this I simply pass back an empty object {} with my desired status code.

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