Questions tagged [reflect-metadata]
83 questions
0
votes
0 answers
TypeORM not working with Lambda using SAM/esbuild: Cannot find module 'reflect-metadata'
I've a small lambda configured through SAM
OrganizationPOSTFunction:
Type: AWS::Serverless::Function
Properties:
FunctionName: OrganizationPOST
CodeUri: ../src/
Handler: organization-post.lambdaHandler
Timeout: 900
…
clagccs
- 2,224
- 2
- 21
- 33
0
votes
0 answers
Iterating on prototypes in typescript
I am trying to learn typescript and in my course, there is a section where my tutor is trying to create a class for login controller and I am trying to use decorators to create some kind of modular structure.
Now, what is my problem? I create…
Farbod Shabani
- 422
- 4
- 9
0
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0 answers
Can't get Reflect.metadata to work in React
I have this Typescript code:
import 'reflect-metadata';
export const formatMetadataKey = Symbol("format");
export function format(formatString: string)
{
return Reflect.metadata(formatMetadataKey, formatString);
}
export function…
Adrian Rosca
- 6,922
- 9
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- 57
0
votes
0 answers
How to get the decorators applied to method arguments?
I am looking for a way to get the decorators applied to each method arguments using Reflect.getMetadataKeys.This works perfect to get decorators applied to method itself but I don't know how to get to the arguments decorators. In my case I want to…
0
votes
0 answers
Getting a property type using reflect-metadata
I have a number of classes that all have a body property, e.g:
class MyClass {
body: {
name: string,
address: string,
favouriteThings: Array
}
}
I'd like to have an automated way of getting the type of the body object, so I…
Pezholio
- 2,439
- 5
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- 41
0
votes
0 answers
Get param class type in NestJS cutom param decorator
I have a NestJS TS application that has an xml endpoint. I want to validate an xml body. Here's how I went with parsing xml to js object:
@Injectable()
export class XmlToJsInterceptor implements NestInterceptor {
constructor(private parser:…
deathangel908
- 8,601
- 8
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- 81
0
votes
1 answer
plainToClass to call object.method() in web worker thread
I am using angular, trying to pass an object to the web worker for the background process.
the class is
Article{
method1();
propertyA;
}
addEventListener('message', ({ data }) => {
// if without plainToClass, how to call article.method1()
…
Tonghua
- 57
- 8
0
votes
1 answer
refect-metadata "design:type" circular dependency
In this repo you can clearly see that both of the classes have metadata design:type on the properties. Only one of them though shows when I try to probe for it. Can someone explain?
SamJust
- 101
- 1
- 1
- 4
0
votes
1 answer
Access class decorator argument using reflect-metadata
Consider a class decorator with one argument:
@TableName("Orders")
export class Order {
// ...
}
And the decorator defined as:
import "reflect-metadata";
const classDecoratorKey = Symbol.for("custom:TableName");
export function…
Carlos Torres
- 419
- 2
- 9
- 19
0
votes
1 answer
Cannot define nor retrieve metadata on method
I'm trying to attach a metadata key-value pair to an object key (method in a TS class), but no action is actually being performed on the element.
import 'reflect-metadata';
export const get = (path: string) => (target: any, key: string, desc:…
Leonardo Viada
- 373
- 3
- 13
0
votes
1 answer
Typescript Decorators before class instance
Iam playing around with Typescript decorators and everything is quite good working when I have instanciated a class.
With the following code, my Class-decorator gets called:
import { MyClass } from "./MyClass";
const myClass = new MyClass();
But…
m_____0
- 375
- 5
- 18
0
votes
0 answers
Use a custom ClassDecorator to inject a dependency in class instance
I'm writing a module for NestJS where I'd like to have a custom ClassDecorator that:
Makes a class @Injectable
Injects a dependency in the class instance
Here is a few lines of code that illustrate what I expect:
// app.module.ts
@Module({
…
fwoelffel
- 412
- 7
- 16
0
votes
1 answer
loader exception / circular reference by decorators
Question
I get a circular loader exception. This is may caused by the compiler option "emitDecoratorMetadata":true.
How can I fix it? Thanks for helpful replays!
Introduction
I have prepared a minimal project for reproducing the error. Please take a…
Barock
- 427
- 1
- 4
- 12
0
votes
1 answer
Pass object and attribute at once for reflect-metadata in TypeScript like in C#
In C# we've DataAnnotation to add meta attributes on properties. I need this functionality in TypeScript for a ldap model class. Decorators should set the LDAP attribute which is internally used in the LDAP directory
export class LdapUser {
…
user6643481
0
votes
1 answer
Define a decorator guard in typescript
Imagine that you have classes that implement a certain decorator:
@Component
class A
@Component
class B
If you want to have a variable that holds the class itself of some of this classes, what type would it have?
componentClass: typeof A | typeof…
Sergio Carneiro
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