流星方法在客户端和服务器上返回不同的对象

Question

I have a simple method, which should return all available methods on server back to client, but returned response is an empty object.

Client:

Meteor.call("servMethods", function(err, res) {
  if(err) {
    console.log(err);
  }
  if(res) {
    console.log(res);
    // logs only:
    // Object {}
  }
});

Server:

Meteor.methods({
  "met1": function() {
  },
  "met2": function() {
  },
  "servMethods": function() {
    var methods = Meteor.default_server.method_handlers;
    console.log(methods);
    return methods;

    // logs correctly:
    // { met1: [Function: met1],
    //   met2: [Function: met2],
    //   servMethods: [Function: servMethods] }

  }
});

Answer 1

Server–side methods can only return EJSON–able values to the client. Functions are not EJSON-able, and therefore they're filtered out from the result object.

If you want to send the list of all available method names to the client, filter out the functions yourself, for example:

"servMethods": function() {
  return _.keys(Meteor.default_server.method_handlers);
},