class-transformer | Decorator-based transformation serialization | JSON Processing library

 by   typestack TypeScript Version: v0.5.1 License: MIT

kandi X-RAY | class-transformer Summary

kandi X-RAY | class-transformer Summary

class-transformer is a TypeScript library typically used in Utilities, JSON Processing applications. class-transformer has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

In JavaScript there are two types of objects:. Plain objects are objects that are instances of Object class. Sometimes they are called literal objects, when created via {} notation. Class objects are instances of classes with own defined constructor, properties and methods. Usually you define them via class notation. So, what is the problem?. Sometimes you want to transform plain javascript object to the ES6 classes you have. For example, if you are loading a json from your backend, some api or from a json file, and after you JSON.parse it you have a plain javascript object, not instance of class you have.
Support
    Quality
      Security
        License
          Reuse

            kandi-support Support

              class-transformer has a medium active ecosystem.
              It has 5854 star(s) with 450 fork(s). There are 39 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 234 open issues and 356 have been closed. On average issues are closed in 74 days. There are 47 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of class-transformer is v0.5.1

            kandi-Quality Quality

              class-transformer has 0 bugs and 0 code smells.

            kandi-Security Security

              class-transformer has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              class-transformer code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              class-transformer is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              class-transformer releases are available to install and integrate.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of class-transformer
            Get all kandi verified functions for this library.

            class-transformer Key Features

            No Key Features are available at this moment for class-transformer.

            class-transformer Examples and Code Snippets

            Add a class transformer .
            javadot img1Lines of Code : 4dot img1License : Permissive (MIT License)
            copy iconCopy
            @Override
                public void addTransformer(ClassTransformer transformer) {
                    throw new UnsupportedOperationException("Not supported yet.");
                }  
            Adds a class transformer .
            javadot img2Lines of Code : 4dot img2License : Permissive (MIT License)
            copy iconCopy
            @Override
                public void addTransformer(ClassTransformer transformer) {
                    transformers.add(transformer);
                }  

            Community Discussions

            QUESTION

            Nest.js - "Invalid command: start"
            Asked 2022-Apr-07 at 18:09

            This app worked for a long time in docker container and recently it even doesn't launch.

            In docker container I've this error:

            ...

            ANSWER

            Answered 2022-Apr-07 at 18:09

            The @nestjs/cli dev dependency should be up on version 8 with the rest of the @nestjs/ dependencies. @nestjs/cli v5 doesn't have a start command

            Source https://stackoverflow.com/questions/71783092

            QUESTION

            Why are class-validator decorators removing properties when used with class-transformer
            Asked 2022-Mar-29 at 10:37

            I'm trying to use class-validator and class-transformer to perform validation on API requests in a Next.js API route.

            I've put together this basic API handler to demonstrate:

            ...

            ANSWER

            Answered 2022-Mar-29 at 10:37

            The problem might be that your babel is not configured properly.

            Try to put this into your babel.config.js (create the file if you don’t have it already):

            Source https://stackoverflow.com/questions/71554886

            QUESTION

            Property-based injection with an Abstract Class
            Asked 2022-Feb-28 at 18:23

            I am trying to add an Abstract method to serialize my response objects in order to hash the id's. That would require to have a property-based injection in order to not pass lots of variables through the constructor.

            The class that will be used to Serialize :

            ...

            ANSWER

            Answered 2022-Feb-28 at 18:23

            You're calling new ClassInstance() so you are 100% in control of the class and it's properties. Nest will not inject anything on a manually instantiated class, because it's not managed by Nest's lifecycle in the first place. You can use moduleRef.create to have Nest create an instance for you, but once you use the keyword new you are in charge of that instance.

            Source https://stackoverflow.com/questions/71299362

            QUESTION

            NestJS - GraphQL not working in my jest E2E "is not a function"
            Asked 2022-Feb-20 at 14:45

            It's 3 days i am on this problem of E2E tests on my GraphQL application with NestJS + Apollo / Express.

            When I am running my app with serverless offline or directly with my main file, it's working perfectly. I have my graph and all things I need :)

            But, when I am running E2E tests with Jest, I received an error from the await app.init() inside the beforeEach.

            After playing with the package.json and dependencies, the error throwed is TypeError: (0 , schema_1.makeExecutableSchema) is not a function.

            Someone have any idea please ? I am totally blocked ... :(

            ...

            ANSWER

            Answered 2022-Feb-20 at 14:45

            After many hours of intense programming ... I finally found the problem.

            Be careful if you use some "alias" for imports, because it can overwrite some of the packages used.

            Here, i use the @graphql alias, and it breaks all my tests. When I remove it, the problem disappear.

            Source https://stackoverflow.com/questions/71175141

            QUESTION

            Typeorm using class-transformer to change value in table
            Asked 2022-Jan-26 at 09:50

            I'm using Nest.js with Typeorm and library class-transformer:

            ...

            ANSWER

            Answered 2022-Jan-26 at 09:50

            You can use transformer option: Specifies a value transformer (or array of value transformers) that is to be used to (un)marshal this column when reading or writing to the database. In case of an array, the value transformers will be applied in the natural order from entityValue to databaseValue, and in reverse order from databaseValue to entityValue.

            transformer has two methods:

            1. to: Used to marshal data when writing to the database.
            2. from: Used to unmarshal data when reading from the database.

            Source https://stackoverflow.com/questions/70857405

            QUESTION

            Module not found: Error: Can't resolve 'class-transformer/storage' - Angular Universal / NestJs
            Asked 2022-Jan-22 at 16:04

            Folks, I've been trying to implement an application using angular with angular universal and NestJs. I believe that is possible to seize the nest server not only for SSR, but also to also provide API endpoints.

            I've made the setup recommended on https://github.com/nestjs/ng-universal using ng add @nestjs/ng-universal, pretty standard. After that I added my code to the angular src folder and installed the needed dependencies.

            The problem is that when I try to import a module to nest app.module, I get the following error: Error: Module not found: Error: Can't resolve 'class-transformer/storage'

            I've tried to use webpack, but since my knowledge on webpack is petty, the results were failure after failure, as expected.

            First, is it possible to seize the server also to provide endpoints? Second, what should I do to resolve this module?

            Please find below the repository for reproducing the issue:

            https://github.com/vitordhers/universal-nest

            Thanks in advance

            ...

            ANSWER

            Answered 2022-Jan-22 at 16:04

            Just faced the exact problem, and when I saw your post my glance of hope just disappeared after I saw the date and zero answers :P
            Anyway, ended up here https://github.com/typestack/class-transformer/issues/563 to finally downgrading the class-transformer package to 0.3.1 Worked for me and I hope it does for you too:

            Source https://stackoverflow.com/questions/70802610

            QUESTION

            How can I sanitize / serialize input data with @nestjs/graphql
            Asked 2022-Jan-21 at 15:14

            I'm working on a NestJs app with graphql, and I'm trying to sanitize my resolvers inputs with class-transformer like this :

            ...

            ANSWER

            Answered 2022-Jan-21 at 15:14

            To use the @Transform() decorator, you need to have the ValidationPipe bound to the route, resolver, or server, and you need to set the transform option to true

            Source https://stackoverflow.com/questions/70794134

            QUESTION

            Typescript lint doesn't recognize type transform decorator
            Asked 2021-Dec-20 at 20:22

            I'm using nestjs with class validator to validate env variables, configuration.service.ts is getting its values from configService file which get what it needs from .env and put it in a json object.

            In the port and timeout properties I expect to receive a string since it came from a .env file, the decorator @Type(() => Number) will try to convert whatever it receives into a Number. As far I'm concerned, the decorator only runs as the function call ends, so the function takes a string and returns a string and after that the string is casted into a Number.

            The problem is the properties port and connectTimeoutMS expects a Number, the typescript lint claims it's receiving a string, looks like it's not recognizing the cast decorator. I want to know whether there's a way to get around this or I have to drop the cast decorator.

            configuration.service.ts

            ...

            ANSWER

            Answered 2021-Dec-15 at 04:21

            In the following line you're (not TS) telling to TSC that this.configService.timeOut is an string

            Source https://stackoverflow.com/questions/70358332

            QUESTION

            Mongoose nested ObjectId Array validation Dto
            Asked 2021-Dec-11 at 13:33

            I have a Dto which looks like this:

            ...

            ANSWER

            Answered 2021-Dec-11 at 13:33

            This is a common import mistake:

            ObjectId can be imported from mongoose and from mongoDB.

            The mongoose import is a Type

            The mongodb import is a class representation of the bson ObjectId Type

            So to fix this issue change your import to: import { ObjectId } from "mongodb";

            But actually there is an option to validate MongoIds with this:

            Source https://stackoverflow.com/questions/70315483

            QUESTION

            Typescript TypeORM best way to create and save data
            Asked 2021-Nov-24 at 15:39

            I'm currently working on a NestJS Project in which i have to store loads of data in a single database table. so i created an entity, a repository, a dto and the route in order to store everything. my dto is, just as my entity, extremely long and packed with alot of variables i have to store. pretty much every variable in my dto is optional and in the entity everything is nullable so i have to verify wether that value exists or not before creating a dataset for it.

            my entity:

            ...

            ANSWER

            Answered 2021-Sep-23 at 08:54

            You can check the DTO object and delete the empty properties: here's the solution:

            Source https://stackoverflow.com/questions/69296230

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install class-transformer

            You can download it from GitHub.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
            CLONE
          • HTTPS

            https://github.com/typestack/class-transformer.git

          • CLI

            gh repo clone typestack/class-transformer

          • sshUrl

            git@github.com:typestack/class-transformer.git

          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Explore Related Topics

            Consider Popular JSON Processing Libraries

            json

            by nlohmann

            fastjson

            by alibaba

            jq

            by stedolan

            gson

            by google

            normalizr

            by paularmstrong

            Try Top Libraries by typestack

            class-validator

            by typestackTypeScript

            routing-controllers

            by typestackTypeScript

            typedi

            by typestackTypeScript

            socket-controllers

            by typestackTypeScript

            class-sanitizer

            by typestackTypeScript