loopbackjs

问题 We're developing a SaaS accounting product that uses the Loopback REST framework and allows authenticated end users to create new tables in their own database instance (MySQL or PostgreSQL). QUESTION : How can we create a new root level Looback REST endpoint in code (on the fly) to access the new table? For example if the user adds a new table named 'cars' we need to expose a new root level REST endpoint in code called '/api/cars' that uses the persisted model to provide full CRUD capability

问题 I have a some models generated from postgresql db using looback-connector postgresql. Id column of these models is a auto incremented integer column of postgresql db. 1) I have a remote method added on one of persisted models, where i perform simple update or insert(upsert. Car.CreateOrUpdateCar = function (carobj, req) { Car.upsert(Carobj, function (err, Car) { if (err) console.log(err); else { req(err, Car); } }); }; 2) have added a remote hook to execute after this remote method. Car

问题 I am trying to find a way to have the same funtionality that happens when I put unique:true in express schema. How do I accomplish this in loopback 4. I tried putting unique true in the property decorator but it did not work. @property({ type: 'string', id: true, required: false, unique: true, }) id: string; This doesnt work 回答1: @property decorator in LB4 borrows the same properties as in LB3. Assuming that I have understood your requirements, you can make use of the index property to

问题 I am using loopback3 for file storage attachment.js and i have the persistedmodel career.js for storing the data. Now i want to fetch the file name in the career.js. how to do this. career.js 'use strict'; const app = require('../../server/server'); module.exports = function(Career) { Career.afterRemote('create', function(context, remoteMethodOutput, next) { next(); // console.log(context.result) Career.app.models.Email.send({ to: 'john@gmail.com', from: 'noreply@gmail.com', subject: 'Career

问题 How can I query a field which is null? I get a a sql error filter=[where][category_id][eq][null] results in SELECT WHERE category_id'null' ORDER BY id using latest version of loopback and loopback-connector-mysql 回答1: You can use filter like /model?filter[where][category_id][eq]=null As you see in loopback /medias?filter[where][keywords][inq]=foo&filter[where][keywords][inq]=bar reference link : here 来源： https://stackoverflow.com/questions/52485321/loopback-where-field-is-null

问题 When I use login function User.login({email: 'foo@bar.com', password: 'bar'}, function(err, accessToken) { console.log(err); console.log(accessToken); }) the error is TypeError : Object [Model session] has no method 'create' 回答1: It looks like you are using an old version of LoopBack. Try upgrading and making sure the user model is attached to a data source. Below are the steps to do this. // # Verify version // Ω slc version // slc v2.1.1 (node v0.10.9) // # upgrade with `npm install strong

问题 I'm new to strongloop and look at documentation and samples but never see my problem as desired. I'v two models, sentence.js and log.js and making post request a sentence from mobile app to rest-api, for example Model sentence.js (dont want save to db this model, only for parsing and creating log model) { name: 'sentence', type: 'string' } Model log.js { name: 'lat', type: 'string' }, { name: 'lng', type: 'string' } [HTTP POST] myserver/api/sentence?d=$GPRMC,123519,A,4807.038,N,01131.000,E

问题 How can I get data from two joined tables? Suppose, there are two models called Category (CategoryId, CategoryName) and Product(ProductId, ProductName, CategoryId), Is there a way to get a result like:(ProductId, ProductName, CategoryId, CategoryName) 回答1: There should be a relation between your Category model and your Product model. A Category hasMany Products and each Product belongsTo a Category. So your model json files should be something like Category: { "name":"Category", "properties":

问题 One day, out of nothing, my app decided not to die. After pressing ctrl + c when I inspect port it's still there and not only on my machine but also on server that is managed by PM2 so I need to go there each time and kill the process by hand. I tried to look for issues in my code and when I couldn't I just though that it's simply one of the dependencies fault and soon there will be a fix. It was slightly annoying but I could kill the process with kill -9 PID and I had most of the tasks I had

问题 In this loopback tutorial we can see how own can create model relationships http://docs.strongloop.com/display/public/LB/Tutorial%3A+model+relations#Tutorial:modelrelations-Createmodelrelations Is the same possible in StrongLoop Arc? Thanks 回答1: Loopback and Arc have sort of different functions. For instance the Loopback framework is a set of Node.js modules that you can use independently or together. While Arc is a visual tool suite for creating, packaging, deploying, profiling, managing,