Handling file upload via multipart form post in Loopback custom remote method

Tell me if that help you. With upload and check information in loopback3.

/server/server.js

var loopback = require('loopback');var bodyParser = require('body-parser');var multer = require('multer');var boot = require('loopback-boot');var app = module.exports = loopback();app.use(bodyParser.json()); // for parsing application/jsonapp.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencodedapp.use(multer().any()); // for parsing multipart/form-dataapp.start = function() {

/server/midleware.json

  "parse": {    "body-parser#json": {},    "body-parser#urlencoded": {"params": { "extended": true }}  },

final model:

module.exports = function(Offer) {    Offer.add = function (ctx,options,cb) {    console.log(ctx.req.body);    console.log(ctx.req.files[0]);     if(!options) options = {};    ctx.req.params.container = 'x';Container.upload(ctx.req,ctx.result,{container: 'x'},function (err,fileObj) {fileObj.files[''] ...

and remote my is different then your

 Offer.remoteMethod(    'add',    {      description: 'Uploads a file',      accepts: [        { arg: 'ctx', type: 'object', http: { source:'context' } },        { arg: 'options', type: 'object', http:{ source: 'query'} }      ],      returns: {        type: 'object', root: true      },      http: {verb: 'post'}    }  );

I use postman to send data explorer do not allow for files.Something explorer do some error.

with this options:address: http://0.0.0.0:3000/api/Offers/add?access_token=c6qlcG19lhEYp6C6CztcPHYKpXj2uA3qARMJU7nxBL3trjveHbxNTo0BsvV3vleO

type: POST

authentication: no authentication

headers: empty (default content type is included)

body: form-data with data you want to send

How to configure storage connector to filter size and type of file loopback:

      "storage": {    "name": "storage",    "nameConflict": "makeUnique",    "connector": "loopback-component-storage",    "provider": "filesystem",    "root": "./server/storage",    "maxFileSize": "5242880",    "allowedContentTypes":["image/gif", "image/png", "image/tiff", "image/webp", "image/x-icon", "image/jpeg", "image/svg+xml", "image/x-icon"]  }

How to create relation for model and file in loopback?How to save file info in loopback?You need to have model in data base what save name of file.

        Container.upload(ctx.req,ctx.result,{container: 'x'},function (err,fileObj) {cFile  =  fileObj.files[''][0];    Image.create({                 name: cFile.name,                 type: cFile.type,                 originalFilename: cFile.originalFilename,                   offerId: 3,                 container: "x"},    function (err, obj) { ...