remoteMethod returns "no content" in loopback

Miguel González Aravena

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Aug 17, 2017, 2:13:02 AM8/17/17

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Hi everyone,

I want to build a "Chat" with loopback, but i can't forward because i'm stuck in this error. I use Google and Github and nothing.

This is the model called chat.json

{
  "name": "chats",
  "base": "PersistedModel",
  "idInjection": true,
  "options": {
    "validateUpsert": true
  },
  "properties": {
    "id": {
      "type": "ObjectId",
      "id": true
    },
    "exponente": {
      "type": "ObjectId",
      "required": true
    },
    "usuario": {
      "type": "ObjectId",
      "required": true
    },
    "mensajes": {
      "type": "array"
    }
  },
  "validations": [],
  "relations": {},
  "acls": [],
  "methods": {}
}

And where is the remoteMethod is called chat.js (Both are in common/models/ directory)

'use strict';

module.exports = function(chats) {
  chats.open = function(exponente, usuario, cb) {
    chats.findOrCreate(
      { where: { exponente: exponente, usuario: usuario } },
      { exponente: exponente, usuario: usuario, mensajes: [] },
      function(err, instance, created) {
        console.log('Antes del callback');
        console.log(instance);
        cb(null, instance);
      }
    );
  };

  chats.remoteMethod('open', {
    http: { path: '/open', verb: 'post' },
    accepts: [
      { arg: 'exponente', type: 'string', required: true },
      { arg: 'usuario', type: 'string', required: true }
    ],
    returs: { arg: 'chat', type: 'object' },
    description: 'Find chat id of the document where you can send messages with exponent in the application.'
  });
};

In my model-config.json i have this config with Chat model.

[...]
"charlas": {
    "dataSource": "observatoriotui",
    "public": true
  },
[...]

When i do the query with Loopback page, didn't return a JSON. Response Body say "no content" with Status Code 204.

What can i do? I really need help with this. Sorry for my bad english, i'm Chilean.

Regards.

Raymond Feng

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Aug 17, 2017, 2:23:05 AM8/17/17

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findOrCreate should take the where object itself. The top level where property should be removed.

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Miguel González Aravena

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Aug 17, 2017, 2:28:51 AM8/17/17

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I follow this documentation:
https://apidocs.strongloop.com/loopback/#persistedmodel-findorcreate

Anyway, i tried to return a simple object and have the same Response body "no content" and i don't know why, even i habe other model Charlas with the similar code and this return JSON data.

Francois Laforge

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Aug 17, 2017, 10:12:52 AM8/17/17

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Is a new chat instance being created in the database when none is found when you test your /open endpoint?

I noticed that the name of the model in model-config.json is not the same as in your chat.json file. Is there a reason for this?

Miguel González Aravena

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Aug 21, 2017, 8:06:49 PM8/21/17

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The problem was simple. I write 'returs' instead of 'returns' :D

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